EP2102443A1 - Device or actuating a bottom tool - Google Patents
Device or actuating a bottom toolInfo
- Publication number
- EP2102443A1 EP2102443A1 EP07701581A EP07701581A EP2102443A1 EP 2102443 A1 EP2102443 A1 EP 2102443A1 EP 07701581 A EP07701581 A EP 07701581A EP 07701581 A EP07701581 A EP 07701581A EP 2102443 A1 EP2102443 A1 EP 2102443A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hollow piston
- tubular
- trigger element
- tool according
- tool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010008 shearing Methods 0.000 claims abstract description 10
- 238000006073 displacement reaction Methods 0.000 claims abstract description 5
- 238000005553 drilling Methods 0.000 claims description 24
- 230000004913 activation Effects 0.000 claims description 20
- 210000003717 douglas' pouch Anatomy 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 8
- 229910000639 Spring steel Inorganic materials 0.000 claims description 3
- 239000004519 grease Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 230000003213 activating effect Effects 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 abstract 1
- 239000010802 sludge Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 238000005056 compaction Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 210000003423 ankle Anatomy 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000036461 convulsion Effects 0.000 description 1
- 230000003100 immobilizing effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
- E21B10/322—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools cutter shifted by fluid pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
- E21B23/04—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells operated by fluid means, e.g. actuated by explosion
- E21B23/0413—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells operated by fluid means, e.g. actuated by explosion using means for blocking fluid flow, e.g. drop balls or darts
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
- E21B23/04—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells operated by fluid means, e.g. actuated by explosion
- E21B23/042—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells operated by fluid means, e.g. actuated by explosion using a single piston or multiple mechanically interconnected pistons
Definitions
- a tubular body (1) provided with an axial cavity (2), a hollow piston (8) capable of sliding in said axial cavity and subjected to variable differential hydraulic pressures, and
- the piston immobilized by the activation device is subjected to a differential pressure that acts on the piston up or down.
- the activation device provides a tubular extension extending the piston. The end of this extension is held fixed in a tubular sleeve by shear pins. The sleeve rests on a ring forming stop and attached to the tubular body of the tool.
- This stop prevents the movement of the piston subjected to a differential pressure and thus producing a tensile force on the tubular sleeve, as long as this pressure remains below a predetermined threshold.
- the shear pins are calibrated so that a pulling force of the piston greater than the aforesaid threshold causes a shear of the pins and releases the hollow piston which can then slide in the axial cavity of the tubular body of the tool. In the case of a widening tool, the piston turned motor then allows the deployment of cutting arms.
- the calibrated value of the shear pins is a compromise between, on the one hand, the limit of use of the tool in its dormant mode, that is to say when the hollow piston is not activated, and the limit of the maximum acceptable pressure by the tool or available from the drilling pumps.
- the caliber of the shear pins is expected as high as possible. Shearing is caused by temporary plugging of the tubular sleeve by a ball and / or by a very large increase in the pressure of the drilling muds. The substantial energy stored by the motor piston must then be dissipated upon release of the piston caused by breakage of the pins. The resulting shock can cause deformations of parts and alter the subsequent operation of the tool.
- the present invention aims to develop an activation device that is not subject to the risk of accidental activation of the hollow piston and that allows selective activation thereof without significant release of energy so as to release the hollow piston in the axial cavity of the drilling tool, always adequate.
- safety measures will be provided to prevent the movement of the parts of the tool is prevented or hampered by drilling muds.
- a trigger element integral with the hollow piston which is displaceable from an immobilization position of the hollow piston, in which the trigger element is held in abutment, against said differential pressures, against a support of the tubular body, towards a position in which the trigger element does not abut against said support and releases the hollow piston,
- a tubular expansion sleeve of the trigger element which, in said position of immobilization of said trigger element, is connected to the hollow piston by at least one shear pin and prevents movement of the trigger element from its position immobilizing the hollow piston at its erasure position, and
- a means for temporarily closing the tubular expansion sleeve which, in the closed position, causes a rise in hydraulic pressure on the tubular sleeve, above a predetermined threshold where shear occurs in said at least one pin. shearing, and a sliding of the tubular expansion sleeve in a release position allowing a displacement of the trigger element from its immobilization position of the hollow piston to its erasing position. It can be seen that, in the dormant mode of the tool, the tensile forces exerted by the hollow piston under the action of a differential pressure are not directly transmitted to the shear pins of the activation device.
- the trigger element that holds the immobilized hollow piston, by pressing on a fixed ring, integral with the tubular body of the tool, the trigger element and the support being in no way intended to to be broken during use.
- a hydraulic pressure can not be applied on the sleeve when it is closed.
- a selective activation of the piston because it can take place only by a desired closure of the sleeve, which is controlled from the surface.
- the tubular expansion sleeve is inserted between the trigger element integral with the hollow piston and an extension of the hollow piston, so as to slide between them after shearing of said at least one pin of shear.
- the tubular sleeve comprises a first wall portion having a first thickness and a second wall portion having a second thickness less than the first and, in its position of immobilization of the hollow piston, the trigger member is radially supported on said first wall portion of the sleeve tubular and, in its erasing position, it bears radially on said second wall portion.
- the trigger element is formed of a ring of blades which extend axially around the first part of the tubular sleeve in the immobilization position of the trigger element and which are supported radially on said second portion of the tubular sleeve when the trigger element is in the erasing position.
- the tubular extension extending the hollow piston is provided with a ring of blades, preferably metal, preferably spring steel.
- the rigid tubular sleeve is fixedly held at this extension by shear pins. In this position the blades rest on the thick part of the sleeve and are therefore kept apart from one another.
- the end of these blades which are advantageously thickened and protrude radially outwards, are then in axial abutment against a retaining ring projecting radially inside the tubular body. This arrangement prevents any movement of the piston and the tool is kept in its dormant mode.
- the temporary sealing means is a ball launched into said axial cavity, the tubular expansion sleeve comprising a seat for receiving this ball and lateral openings to restore a flow of hydraulic fluid when the tubular sleeve is in its release position.
- a hydraulic pressure obtained by closing the passage of the drilling muds by means of said ball exerts a force on the sleeve.
- This effort which can be minimal, causes shearing of the shear pins and releases the sleeve that can be released.
- the blades of the trigger element are then in front of the thinned portion of the sleeve and they can flex radially inwards, for example under a radial thrust of the retaining ring or under the action of an elastic restoring force. In this bent position, the blades can slide inside the retaining ring under the action of the tension of the released hollow piston.
- the tool is then activated.
- the tool further comprises
- a cul-de-sac chamber which extends annularly between said tubular body and said hollow piston and / or a tubular extension thereof, through which drilling muds pass, a surface of the hollow piston axially limiting this chamber in ankle -de-sac, first side,
- annular ring which axially limits the dead-end chamber, on a second side opposite the aforesaid, and which is connected to the tubular body by at least one shear pin,
- the hollow piston released by erasing said trigger element, being capable of sliding between a first position in which the dead-end chamber has a first volume and a second position in which the dead-end chamber presents a second volume higher than the first, as well as
- the tool has an annular chamber in cul-de-sac 10 which extends between, on the one hand, the tubular body 1 and, on the other hand, on the other hand, the hollow piston 8 and its tubular extension 13 through which the drilling muds pass.
- the surface 11 of the piston axially limits the chamber 10, on one side, and, on the opposite side, it is limited by an annular ring 26.
- This annular ring 26 is connected to the tubular body 1 via at least one shear pin 27.
Abstract
The invention relates to a bottom tool comprising a tubular body (1) with an axial chamber, a hollow piston (8) capable of sliding in said axial chamber, and an actuation device including a trigger member (14) connected to the hollow piston and capable of displacement from a hollow-piston immobilisation position to a withdrawal position in which it releases the hollow piston, a detent tubular sleeve (16) of the trigger member connected to the hollow piston by at least one shearing pin (17), and means for temporarily blocking the detent tubular sleeve that generates a hydraulic pressure rise on the tubular sleeve with a shearing of said at least one shearing pin and the sliding of the detent tubular sleeve in a release position in which the trigger member is capable of displacement into its withdrawal position.
Description
DISPOSITIF D' ACTIVATION D ' UN OUTIL DE FOND DEVICE FOR ACTIVATION OF A DOWNHOLE TOOL
La présente invention est relative à un outil de fond comportantThe present invention relates to a background tool comprising
- un corps tubulaire (1) doté d'une cavité axiale (2), - un piston creux (8) capable de coulisser dans ladite cavité axiale et soumis à des pressions hydrauliques différentielles variables, eta tubular body (1) provided with an axial cavity (2), a hollow piston (8) capable of sliding in said axial cavity and subjected to variable differential hydraulic pressures, and
- un dispositif d'activation du piston creux.an activation device for the hollow piston.
On connaît des outils de fond de ce genre, par exemple des outils d'élargissement et de stabilisation à mettre en œuvre dans un trou de forage (voir par exemple WO 2005/124094).Background tools of this type are known, for example widening and stabilization tools to be implemented in a borehole (see for example WO 2005/124094).
Les outils de forage, d'élargissement ou autres, doivent être descendus avec le piston creux maintenu de manière fixe à l'intérieur du corps tubulaire et ensuite, lorsque l'outil est en position, le piston creux peut être activé. On a déjà envisagé un système de verrouillage du piston qui, dans une position de fermeture, maintient axialement le piston creux dans une position d'immobilisation et qui est amené en position de libération par commande électrique.The drilling, widening or other tools must be lowered with the hollow piston held fixedly inside the tubular body and then, when the tool is in position, the hollow piston can be activated. It has already been envisaged a piston locking system which, in a closed position, keeps the hollow piston axially in a position of immobilization and which is brought into the release position by electrical control.
Toutefois, d'une manière générale, il est plus courant de commander l'activation du piston creux par voie hydraulique, à l'aide du fluide formé par les boues de forage. Lors de la circulation de celles-ci dans le train de tiges qui relie l'outil à la surface, le piston immobilisé par le dispositif d'activation est soumis à une pression différentielle qui agit sur le piston vers le haut ou vers le bas. Le dispositif d'activation prévoit une extension tubulaire prolongeant le piston . L'extrémité de cette extension est maintenue fixe dans un manchon tubulaire par des goupilles de cisaillement. Le manchon s'appuie sur une bague formant
butée et fixée au corps tubulaire de l'outil. Cette butée empêche le mouvement du piston soumis à une pression différentielle et produisant donc un effort de traction sur le manchon tubulaire, tant que cette pression reste inférieure à un seuil prédéterminé. Les goupilles de cisaillement sont calibrées de façon qu'une force de traction du piston supérieure au seuil susdit provoque un cisaillement des goupilles et libère le piston creux qui peut alors coulisser dans la cavité axiale du corps tubulaire de l'outil. Dans le cas d'un outil d'élargissement, le piston devenu moteur permet alors le déploiement de bras de coupe.In general, however, it is more common to control the activation of the hollow piston hydraulically with the aid of the fluid formed by the drilling muds. As they flow through the drill string that connects the tool to the surface, the piston immobilized by the activation device is subjected to a differential pressure that acts on the piston up or down. The activation device provides a tubular extension extending the piston. The end of this extension is held fixed in a tubular sleeve by shear pins. The sleeve rests on a ring forming stop and attached to the tubular body of the tool. This stop prevents the movement of the piston subjected to a differential pressure and thus producing a tensile force on the tubular sleeve, as long as this pressure remains below a predetermined threshold. The shear pins are calibrated so that a pulling force of the piston greater than the aforesaid threshold causes a shear of the pins and releases the hollow piston which can then slide in the axial cavity of the tubular body of the tool. In the case of a widening tool, the piston turned motor then allows the deployment of cutting arms.
La valeur calibrée des goupilles de cisaillement est un compromis entre, d'une part, la limite d'utilisation de l'outil dans son mode dormant, c'est-à-dire lorsque le piston creux n'est pas activé, et la limite de la pression maximale acceptable par l'outil ou disponible par les pompes de forage.The calibrated value of the shear pins is a compromise between, on the one hand, the limit of use of the tool in its dormant mode, that is to say when the hollow piston is not activated, and the limit of the maximum acceptable pressure by the tool or available from the drilling pumps.
Afin de ne pas limiter les capacités de travail de l'outil en mode dormant, et d'éviter, ce qui n'est pas toujours possible, les risques d'une activation accidentelle qui pourrait être causée par exemple par un à-coup de pression, le calibre des goupilles de cisaillement est prévu le plus élevé possible. Le cisaillement est provoqué par une obturation temporaire du manchon tubulaire par une bille et/ou par une augmentation très importante de la pression des boues de forage. L'énergie substantielle stockée par le piston moteur doit alors être dissipée à la libération du piston provoquée par la rupture des goupilles. Le choc qui en résulte peut provoquer des déformations de pièces et altérer le fonctionnement ultérieur de l'outil.In order not to limit the working capacities of the tool in dormant mode, and to avoid, which is not always possible, the risks of an accidental activation which could be caused for example by a sudden jerk of pressure, the caliber of the shear pins is expected as high as possible. Shearing is caused by temporary plugging of the tubular sleeve by a ball and / or by a very large increase in the pressure of the drilling muds. The substantial energy stored by the motor piston must then be dissipated upon release of the piston caused by breakage of the pins. The resulting shock can cause deformations of parts and alter the subsequent operation of the tool.
D'autre part, l'expérience a montré que des volumes morts et des jeux entre pièces pouvaient présenter un obstacle au bon fonctionnement de la mécanique de l'outil. En effet, les particules présentes dans les boues de forage peuvent se compacter ou se
cimenter à ces endroits de façon à gêner ou à empêcher les mouvements des pièces.On the other hand, experience has shown that dead volumes and interplay between parts can be an obstacle to the proper functioning of the tool's mechanics. In fact, the particles present in the drilling muds can be compacted or cement at these locations to interfere with or prevent movement of the parts.
La présente invention a pour but de mettre au point un dispositif d'activation qui ne soit pas soumis aux risques d'activation accidentelle du piston creux et qui permette une activation sélective de celui-ci sans dégagement important d'énergie de façon à libérer le piston creux dans la cavité axiale de l'outil de forage, de manière toujours adéquate. Avantageusement, des mesures de sécurité seront prévues pour éviter que le mouvement des pièces de l'outil ne soit empêché ou gêné par les boues de forage.The present invention aims to develop an activation device that is not subject to the risk of accidental activation of the hollow piston and that allows selective activation thereof without significant release of energy so as to release the hollow piston in the axial cavity of the drilling tool, always adequate. Advantageously, safety measures will be provided to prevent the movement of the parts of the tool is prevented or hampered by drilling muds.
On résout ces problèmes par un dispositif tel qu'indiqué au début, qui comprendThese problems are solved by a device as indicated at the beginning, which includes
- un élément de gâchette solidaire du piston creux qui est déplaçable depuis une position d'immobilisation du piston creux, dans laquelle l'élément de gâchette est retenu en butée, à rencontre desdites pressions différentielles, contre un appui du corps tubulaire, vers une position d'effacement dans laquelle l'élément de gâchette n'est pas en butée contre ledit appui et libère le piston creux,a trigger element integral with the hollow piston which is displaceable from an immobilization position of the hollow piston, in which the trigger element is held in abutment, against said differential pressures, against a support of the tubular body, towards a position in which the trigger element does not abut against said support and releases the hollow piston,
- un manchon tubulaire de détente de l'élément de gâchette qui, dans ladite position d'immobilisation dudit élément de gâchette, est relié au piston creux par au moins une goupille de cisaillement et empêche un déplacement de l'élément de gâchette de sa position d'immobilisation du piston creux à sa position d'effacement, eta tubular expansion sleeve of the trigger element which, in said position of immobilization of said trigger element, is connected to the hollow piston by at least one shear pin and prevents movement of the trigger element from its position immobilizing the hollow piston at its erasure position, and
- un moyen d'obturation temporaire du manchon tubulaire de détente qui, en position d'obturation, provoque une élévation de pression hydraulique sur le manchon tubulaire, au-dessus d'un seuil prédéterminé où a lieu un cisaillement de ladite au moins une goupille de cisaillement, et un coulissement du manchon tubulaire de détente dans une position de libération permettant un déplacement de l'élément de gâchette de sa position d'immobilisation du piston creux à sa position d'effacement.
On peut constater que, en mode dormant de l'outil, les efforts de traction exercés par le piston creux sous l'action d'une pression différentielle ne sont pas directement transmis aux goupilles de cisaillement du dispositif d'activation. Au contraire, c'est l'élément de gâchette qui retient le piston creux immobilisé, par appui sur une bague fixe, solidaire du corps tubulaire de l'outil, l'élément de gâchette et l'appui n'étant en aucune façon destinés à être rompus pendant l'utilisation. Les risques d'activation accidentelle durant la phase de travail en mode dormant de l'outil sont ainsi écartés. D'autre part, une pression hydraulique ne peut s'appliquer sur le manchon que lorsque celui-ci est obturé. Il y a donc une activation sélective du piston, car celle-ci ne peut avoir lieu que par une obturation voulue du manchon, laquelle est commandée depuis la surface. Puisqu'il n'y a pas de lien direct entre les efforts de traction exercés par le piston et les efforts de cisaillement des goupilles, celles-ci peuvent être calibrées à une valeur de résistance beaucoup plus basse qu'auparavant et la pression d'activation nécessaire pour les rompre peut être relativement faible, ce qui permet d'éviter une mise en jeu d'énergie trop importante et donc des dommages potentiels à l'équipement. Suivant une forme de réalisation de l'invention, le manchon tubulaire de détente est inséré entre l'élément de gâchette solidaire du piston creux et une extension du piston creux, de manière à pouvoir coulisser entre eux après cisaillement de ladite au moins une goupille de cisaillement. Suivant une forme avantageuse de réalisation de l'invention, le manchon tubulaire comporte une première partie à paroi présentant une première épaisseur et une deuxième partie à paroi présentant une deuxième épaisseur inférieure à la première et, dans sa position d'immobilisation du piston creux, l'élément de gâchette est en appui radialement sur ladite première partie de paroi du manchon
tubulaire et, dans sa position d'effacement, il est en appui radialement sur ladite deuxième partie de paroi.- A means for temporarily closing the tubular expansion sleeve which, in the closed position, causes a rise in hydraulic pressure on the tubular sleeve, above a predetermined threshold where shear occurs in said at least one pin. shearing, and a sliding of the tubular expansion sleeve in a release position allowing a displacement of the trigger element from its immobilization position of the hollow piston to its erasing position. It can be seen that, in the dormant mode of the tool, the tensile forces exerted by the hollow piston under the action of a differential pressure are not directly transmitted to the shear pins of the activation device. On the contrary, it is the trigger element that holds the immobilized hollow piston, by pressing on a fixed ring, integral with the tubular body of the tool, the trigger element and the support being in no way intended to to be broken during use. The risks of accidental activation during the dormant work phase of the tool are thus eliminated. On the other hand, a hydraulic pressure can not be applied on the sleeve when it is closed. There is therefore a selective activation of the piston, because it can take place only by a desired closure of the sleeve, which is controlled from the surface. Since there is no direct link between the tensile forces exerted by the piston and the shear forces of the pins, they can be calibrated to a resistance value much lower than before and the pressure of activation needed to break them can be relatively low, which avoids too much energy play and therefore potential damage to the equipment. According to one embodiment of the invention, the tubular expansion sleeve is inserted between the trigger element integral with the hollow piston and an extension of the hollow piston, so as to slide between them after shearing of said at least one pin of shear. According to an advantageous embodiment of the invention, the tubular sleeve comprises a first wall portion having a first thickness and a second wall portion having a second thickness less than the first and, in its position of immobilization of the hollow piston, the trigger member is radially supported on said first wall portion of the sleeve tubular and, in its erasing position, it bears radially on said second wall portion.
Suivant une forme perfectionnée de réalisation de l'invention, l'élément de gâchette est formé d'une couronne de lames qui s'étendent axialement autour de la première partie du manchon tubulaire en position d'immobilisation de l'élément de gâchette et qui viennent en appui radialement sur ladite deuxième partie du manchon tubulaire lorsque l'élément de gâchette est en position d'effacement.According to an improved embodiment of the invention, the trigger element is formed of a ring of blades which extend axially around the first part of the tubular sleeve in the immobilization position of the trigger element and which are supported radially on said second portion of the tubular sleeve when the trigger element is in the erasing position.
L'extension tubulaire prolongeant le piston creux est donc pourvue d'une couronne de lames, de préférence métalliques, avantageusement en acier à ressort. Le manchon tubulaire, rigide, est maintenu de manière fixe à cette extension par des goupilles de cisaillement. Dans cette position les lames reposent sur la partie épaisse du manchon et sont donc maintenues écartées l'une de l'autre. L'extrémité de ces lames, qui sont avantageusement épaissies et font saillie radialement vers l'extérieur, sont alors en appui axial contre une bague de retenue faisant saillie radialement à l'intérieur du corps tubulaire. Cet agencement empêche tout mouvement du piston et l'outil est maintenu dans son mode dormant. Suivant encore une forme de réalisation de l'invention le moyen d'obturation temporaire est une bille lancée dans ladite cavité axiale, le manchon tubulaire de détente comportant un siège pour recevoir cette bille et des ouvertures latérales permettant de rétablir une circulation de fluide hydraulique lorsque le manchon tubulaire est dans sa position de libération.The tubular extension extending the hollow piston is provided with a ring of blades, preferably metal, preferably spring steel. The rigid tubular sleeve is fixedly held at this extension by shear pins. In this position the blades rest on the thick part of the sleeve and are therefore kept apart from one another. The end of these blades, which are advantageously thickened and protrude radially outwards, are then in axial abutment against a retaining ring projecting radially inside the tubular body. This arrangement prevents any movement of the piston and the tool is kept in its dormant mode. According to another embodiment of the invention the temporary sealing means is a ball launched into said axial cavity, the tubular expansion sleeve comprising a seat for receiving this ball and lateral openings to restore a flow of hydraulic fluid when the tubular sleeve is in its release position.
Une pression hydraulique obtenue par l'obturation du passage des boues de forage au moyen de ladite bille exerce un effort sur le manchon. Cet effort, qui peut être minime, provoque le cisaillement des goupilles de cisaillement et libère le manchon qui peut se dégager. Les lames de l'élément de gâchette se trouvent alors en face de la partie amincie du manchon et elles peuvent fléchir radialement vers l'intérieur,
par exemple sous une poussée radiale de la bague de retenue ou sous l'action d'une force de rappel élastique. Dans cette position fléchie, les lames peuvent coulisser à l'intérieur de la bague de retenue sous l'action de la traction du piston creux libéré. L'outil est alors activé. Suivant une autre forme de réalisation de l'invention, l'outil comprend en outreA hydraulic pressure obtained by closing the passage of the drilling muds by means of said ball exerts a force on the sleeve. This effort, which can be minimal, causes shearing of the shear pins and releases the sleeve that can be released. The blades of the trigger element are then in front of the thinned portion of the sleeve and they can flex radially inwards, for example under a radial thrust of the retaining ring or under the action of an elastic restoring force. In this bent position, the blades can slide inside the retaining ring under the action of the tension of the released hollow piston. The tool is then activated. According to another embodiment of the invention, the tool further comprises
- une chambre en cul-de-sac qui s'étend annulairement entre ledit corps tubulaire et ledit piston creux et/ou une extension tubulaire de celui-ci où passent des boues de forage, une surface du piston creux limitant axialement cette chambre en cul-de-sac, d'un premier côté,a cul-de-sac chamber which extends annularly between said tubular body and said hollow piston and / or a tubular extension thereof, through which drilling muds pass, a surface of the hollow piston axially limiting this chamber in ankle -de-sac, first side,
- une bague annulaire qui limite axialement la chambre en cul-de-sac, d'un second côté opposé au premier susdit, et qui est reliée au corps tubulaire par au moins une goupille de cisaillement,an annular ring which axially limits the dead-end chamber, on a second side opposite the aforesaid, and which is connected to the tubular body by at least one shear pin,
- une communication pour fluide entre l'intérieur du piston creux et/ou de son extension tubulaire et la chambre en cul-de-sac, ladite surface du piston creux étant ainsi soumise auxdites pressions hydrauliques différentielles variables desdites boues de forage,a communication for fluid between the interior of the hollow piston and / or its tubular extension and the dead-end chamber, said surface of the hollow piston thus being subjected to said variable differential hydraulic pressures of said drilling muds,
- le piston creux, libéré par effacement dudit élément de gâchette, étant capable de coulisser entre une première position dans laquelle la chambre en cul-de-sac présente un premier volume et une deuxième position dans laquelle la chambre en cul-de-sac présente un deuxième volume supérieur au premier, ainsi quethe hollow piston, released by erasing said trigger element, being capable of sliding between a first position in which the dead-end chamber has a first volume and a second position in which the dead-end chamber presents a second volume higher than the first, as well as
- des moyens de rappel qui agissent sur le piston creux pour le ramener à sa première position, ladite au moins une goupille de cisaillement étant, lorsqu'un obstacle empêche le piston creux de retourner à sa première position et augmente ainsi la pression appliquée sur la bague annulaire au-delà d'un seuil prédéterminé, cisaillée en libérant la bague annulaire et en permettant ainsi un retour du piston creux à sa première position. D'autres particularités de l'invention sont indiquées dans les revendications annexées.
D'autres détails de l'invention ressortiront de la description donnée ci-après, à titre non limitatif, d'une forme de réalisation de l'outil de fond muni d'un dispositif d'activation suivant l'invention.- return means which act on the hollow piston to bring it back to its first position, said at least one shear pin being, when an obstacle prevents the hollow piston from returning to its first position and thus increases the pressure applied to the annular ring beyond a predetermined threshold, sheared by releasing the annular ring and thus allowing a return of the hollow piston to its first position. Other features of the invention are indicated in the appended claims. Other details of the invention will become apparent from the description given below, without limitation, of an embodiment of the bottom tool provided with an activation device according to the invention.
Les figures 1 et 2 représentent une vue en coupe axiale d'un même outil d'élargissement doté d'un dispositif d'activation suivant l'invention.Figures 1 and 2 show an axial sectional view of the same enlargement tool provided with an activation device according to the invention.
La figure 3 représente une vue en coupe axiale d'un dispositif d'activation suivant l'invention, dans laquelle l'outil fonctionne en mode dormant. La figure 4 représente une vue en coupe axiale du dispositif d'activation suivant la figure 3, dans laquelle l'outil est en mode activé.FIG. 3 represents a view in axial section of an activation device according to the invention, in which the tool operates in a dormant mode. FIG. 4 represents an axial sectional view of the activation device according to FIG. 3, in which the tool is in activated mode.
La figure 5 représente une vue en perspective partiellement brisée du dispositif d'activation illustré sur les figures 3 et 4.FIG. 5 represents a partially broken perspective view of the activation device illustrated in FIGS. 3 and 4.
La figure 6 représente une vue à l'échelle agrandie du détail A de la figure 2.FIG. 6 represents an enlarged view of detail A of FIG. 2.
Sur les différents dessins les éléments identiques ou analogues portent les mêmes références.In the different drawings, identical or similar elements bear the same references.
La description des figures 1 et 2 porte sur un exemple d'outil de fond suivant l'invention sur lequel un dispositif d'activation peut être agencé. On a prévu ici, à titre d'exemple, que l'outil est un outil d'élargissement et de stabilisation à mettre en œuvre dans un trou de forage. Il pourrait cependant s'agir de tout outil faisant usage d'un piston moteur qui doit être activé uniquement lorsque l'outil est en position dans le trou de forage et qui est immobilisé pendant la descente. L'outil illustré sur les figures 1 et 2 comprend un corps tubulaire 1 à monter entre une première section d'un train de tiges et une deuxième section de celui-ci. Ce corps tubulaire 1 présente une cavité axiale 2 dans laquelle circule les boues de forage. En périphérie le corps tubulaire 1 comporte des logements 3 pourvus d'une ouverture vers l'extérieur.
Dans l'exemple illustré, un élément de couteau 4 est logé dans chaque logement 3 et il comporte deux bras de coupe 5 et 6 articulés entre eux ainsi que sur un moyen de transmission en forme de coulisseau 7. Dans la position illustrée les bras 5 et 6 sont en retrait dans leur logement et l'outil est en mode dormant.The description of FIGS. 1 and 2 relates to an example of a bottom tool according to the invention on which an activation device can be arranged. By way of example, the tool is intended here to be a widening and stabilization tool to be implemented in a borehole. It could however be any tool using a piston engine that must be activated only when the tool is in position in the borehole and is immobilized during the descent. The tool illustrated in Figures 1 and 2 comprises a tubular body 1 to be mounted between a first section of a drill string and a second section thereof. This tubular body 1 has an axial cavity 2 in which the drilling muds circulate. At the periphery, the tubular body 1 comprises housings 3 provided with an opening towards the outside. In the example illustrated, a knife element 4 is housed in each housing 3 and it comprises two cutting arms 5 and 6 hinged together and on a transmission means in the form of a slide 7. In the illustrated position the arms 5 and 6 are recessed in their housing and the tool is in sleep mode.
Dans l'exemple illustré, un moyen moteur conçu sous la forme d'un piston creux 8 est agencé à l'intérieur du corps tubulaire 1 , en permettant une circulation des boues sans entrave à l'intérieur du corps tubulaire. Le piston creux 8 est relié au coulisseau 7. Ainsi qu'il ressort des figures 1 , 2 et 6, les boues de forage peuvent s'accumuler dans une chambre ou cul-de-sac annulaire 10 où le piston 8 est, par sa surface 11 , en contact avec le fluide hydraulique sous pression formé par les boues de forage. Le piston, est, dans le cas illustré, indirectement en appui sur un ressort de rappel 12 qui, à son extrémité opposée, bute sur un élément solidaire du corps tubulaire 1 et agit en sens inverse à la pression susdite du fluide hydraulique passant par la cavité axiale 2.In the illustrated example, a motor means designed in the form of a hollow piston 8 is arranged inside the tubular body 1, allowing unhindered flow of sludge inside the tubular body. The hollow piston 8 is connected to the slide 7. As can be seen in FIGS. 1, 2 and 6, the drilling muds can accumulate in an annular chamber or cul-de-sac 10 where the piston 8 is, by its surface 11, in contact with the hydraulic fluid under pressure formed by the drilling muds. The piston is, in the illustrated case, indirectly supported on a return spring 12 which, at its opposite end, abuts on an element integral with the tubular body 1 and acts in the opposite direction to the above-mentioned pressure of the hydraulic fluid passing through the axial cavity 2.
Ainsi qu'il est représenté de manière plus détaillée dans l'exemple de réalisation illustré sur les figures 3 à 5, le piston 8 est doté d'une extension tubulaire 13 du côté aval autour de laquelle le ressort de rappel est agencé en prenant appui sur elle, ce qui permet une disposition décentrée du ressort 12 par rapport aux bras de coupe. Cette extension est pourvue d'un élément de gâchette 14 qui est donc solidaire du piston 8. Dans l'exemple illustré, l'élément de gâchette est formé d'une couronne de lames 15 avantageusement flexibles, par exemple en acier à ressort, qui s'étendent axialement en direction aval, autour d'une partie de l'extension tubulaire 13.As is shown in more detail in the exemplary embodiment illustrated in FIGS. 3 to 5, the piston 8 is provided with a tubular extension 13 on the downstream side around which the return spring is arranged while taking support on it, which allows an off-center arrangement of the spring 12 relative to the cutting arms. This extension is provided with a trigger element 14 which is therefore integral with the piston 8. In the example illustrated, the trigger element is formed of a ring of blades 15 which are advantageously flexible, for example made of spring steel, which extend axially downstream around a portion of the tubular extension 13.
Un manchon tubulaire de détente 16 est inséré entre les lames 15 de l'élément de gâchette 14 et ladite extension tubulaire 13 du piston creux 8. Ce manchon est relié à l'extension 13 par des goupilles de cisaillement 17, dont une seule est représentée.
Dans l'exemple illustré, dans sa partie aval 18, le manchon tubulaire 16 présente une plus grande épaisseur que dans sa partie amont 19 et avantageusement la transition entre les parties aval et amont est réalisée en pente. Dans la position illustrée sur la figure 3 où le manchon tubulaire 16 est immobilisé sur l'extension tubulaire 13, les lames 15 de l'élément de gâchette 14 sont en appui sur la partie aval 18 plus épaisse du manchon et sont donc maintenues écartées radialement vers l'extérieur.A tubular expansion sleeve 16 is inserted between the blades 15 of the trigger element 14 and said tubular extension 13 of the hollow piston 8. This sleeve is connected to the extension 13 by shear pins 17, only one of which is shown . In the illustrated example, in its downstream portion 18, the tubular sleeve 16 has a greater thickness than in its upstream portion 19 and advantageously the transition between the downstream and upstream parts is made sloping. In the position illustrated in FIG. 3, where the tubular sleeve 16 is immobilized on the tubular extension 13, the blades 15 of the trigger element 14 bear against the thicker downstream part 18 of the sleeve and are thus kept radially spaced apart. outwards.
Dans cette position d'écartement, l'extrémité libre 20, avantageusement épaissie, des lames 15 vient axialement en butée contre une bague de retenue 21 , solidaire du corps tubulaire 1 de l'outil.In this spacing position, the free end 20, advantageously thickened, blades 15 comes axially abutting against a retaining ring 21 integral with the tubular body 1 of the tool.
Lorsque l'outil est descendu en mode dormant, même si la pression hydraulique des boues exercées sur le piston 8 est importante et développe un effort de traction vers le haut, celle-ci est contrecarrée par la butée des lames 15 contre la bague de retenue 21.When the tool is lowered in the sleeping mode, even if the hydraulic pressure of sludge exerted on the piston 8 is large and develops an upward pulling force, it is counteracted by the stop of the blades 15 against the retaining ring 21.
A son extrémité aval le manchon tubulaire de détente 16 est pourvu d'un siège de réception 22 destiné à recevoir un moyen d'obturation 23, une bille dans le cas illustré, qui est lancé depuis la surface. Le manchon 16 est aussi pourvu d'ouvertures latérales 24, dont une seule est représentée sur la figure 3. Lorsqu'une bille est amenée à obturer le passage des boues dans la cavité axiale, l'augmentation brusque de pression exercée sur le manchon tubulaire 16 a pour effet de cisailler les goupilles 17 en libérant le manchon. Celui-ci peut alors coulisser vers l'aval entre les lames 15 de l'élément de gâchette et l'extension tubulaire 13 du piston creux. Dans cette position illustrée sur la figure 4, les ouvertures latérales 24 permettent de rétablir la circulation des boues dans la cavité axiale.At its downstream end the tubular expansion sleeve 16 is provided with a receiving seat 22 for receiving a closure means 23, a ball in the illustrated case, which is launched from the surface. The sleeve 16 is also provided with lateral openings 24, only one of which is shown in FIG. 3. When a ball is brought to close the passage of the sludge in the axial cavity, the sudden increase in pressure exerted on the tubular sleeve 16 has the effect of shearing the pins 17 by releasing the sleeve. This can then slide downstream between the blades 15 of the trigger member and the tubular extension 13 of the hollow piston. In this position illustrated in FIG. 4, the lateral openings 24 make it possible to restore the circulation of the sludge in the axial cavity.
Ainsi qu'il ressort de la figure 4, les lames 15 sont parvenues, par rappel élastique, en appui radial contre la partie amincie 19 du manchon tubulaire de détente 16. On pourrait aussi prévoir que ce fléchissement des lames 15 résulte d'une déformation élastique sous une
poussée en sens radial de l'extrémité en biais de la bague de retenue 21. Les lames 15 sont ainsi passées dans une position d'effacement dans laquelle elles ne sont plus en appui axial contre la bague de retenue 21. Sous l'action du piston creux 8 soumis à une pression hydraulique qui le pousse vers l'amont, les lames 15 de l'élément de gâchette 14 en position d'effacement peuvent passer à l'intérieur de ladite bague 21. Le piston creux 8 est à présent libéré et l'outil est activé. Dans le cas présent, le piston peut commander un déploiement des bras de coupe 5 et 6 pour procéder par exemple à un élargissement du trou de forage.As is apparent from FIG. 4, the blades 15 have reached, by elastic return, a radial abutment against the thinned portion 19 of the tubular expansion sleeve 16. It could also be provided that this deflection of the blades 15 results from a deformation elastic under a thrust in the radial direction of the biased end of the retaining ring 21. The blades 15 are thus moved into an erasing position in which they are no longer in axial abutment against the retaining ring 21. Under the action of hollow piston 8 subjected to a hydraulic pressure which pushes it upstream, the blades 15 of the trigger element 14 in the erasing position can pass inside said ring 21. The hollow piston 8 is now released and the tool is activated. In this case, the piston can control a deployment of the cutting arms 5 and 6 to proceed for example to an enlargement of the borehole.
Ainsi qu'il ressort de la figure 6, et comme déjà indiqué précédemment, l'outil compte une chambre annulaire en cul-de-sac 10 qui s'étend entre, d'une part, le corps tubulaire 1 et, d'autre part, le piston creux 8 et son extension tubulaire 13 par où passent les boues de forage. La surface 11 du piston limite axialement la chambre 10, d'un côté, et, du côté opposé, elle est limitée par une bague annulaire 26. Cette bague annulaire 26 est reliée au corps tubulaire 1 par l'intermédiaire d'au moins une goupille de cisaillement 27.As is apparent from FIG. 6, and as already indicated above, the tool has an annular chamber in cul-de-sac 10 which extends between, on the one hand, the tubular body 1 and, on the other hand, on the other hand, the hollow piston 8 and its tubular extension 13 through which the drilling muds pass. The surface 11 of the piston axially limits the chamber 10, on one side, and, on the opposite side, it is limited by an annular ring 26. This annular ring 26 is connected to the tubular body 1 via at least one shear pin 27.
Une communication pour fluide, sous la forme d'orifices 25, permet une pénétration des boues de forage à l'intérieur du piston creux 8 dans la chambre annulaire 10. La surface 11 du piston 8 est ainsi soumise aux variations de pression des boues de forage passant par l'outil. Le piston creux 8, libéré par effacement de l'élément de gâchette, est ainsi capable de coulisser entre une première position représentée sur la figure 6, qui correspond à la position d'immobilisation du piston non libéré, et une position où la chambre annulaire 10 présente un volume supérieur à celui de la première position, le piston étant repoussé vers le haut sous la pression des boues de forage. Le piston peut être rappelé vers sa première position par le ressort de rappel 12 en cas de diminution de la pression des boues de forage passées dans le corps de l'outil.
Chaque mouvement du piston moteur 8 entraîne un phénomène de succion (augmentation du volume de la chambre 10 quand le piston est en position haute) et de rejet (diminution du volume 10 quand le piston est en position basse) de la boue de forage par les orifices 25 dans et respectivement hors de la chambre en cul-de-sac 10. Ces mouvements de boue, associés à des effets de décantation de particules solides de la boue ou à des effets centrifuges des particules solides de la boue, peuvent provoquer un encrassement excessif du volume de la chambre 10. De plus, le pourcentage du volume de boue stagnante, qui n'est pas renouvelé, peut présenter un phénomène de cimentation. Le bourrage du volume de la chambre 10 peut ainsi empêcher la course complète du mouvement du piston moteur, en entravant le retrait complet des bras de coupe 5 et 6.A communication for fluid, in the form of orifices 25, allows penetration of the drilling muds inside the hollow piston 8 in the annular chamber 10. The surface 11 of the piston 8 is thus subjected to pressure variations of the sludge. drilling passing through the tool. The hollow piston 8, released by erasure of the trigger element, is thus able to slide between a first position shown in FIG. 6, which corresponds to the immobilization position of the non-released piston, and a position where the annular chamber 10 has a volume greater than that of the first position, the piston being pushed up under the pressure of drilling muds. The piston can be returned to its first position by the return spring 12 in the event of a reduction in the pressure of the drilling muds passed through the body of the tool. Each movement of the engine piston 8 causes a phenomenon of suction (increase of the volume of the chamber 10 when the piston is in the raised position) and rejection (decrease of the volume 10 when the piston is in the lower position) of the drilling mud by the orifices 25 in and respectively out of the dead-end chamber 10. These sludge movements, associated with settling effects of solid particles of the sludge or centrifugal effects of the solid particles of the sludge, can cause fouling excessive volume of the chamber 10. In addition, the percentage of stagnant sludge volume, which is not renewed, may present a cementing phenomenon. Stuffing the volume of the chamber 10 can thus prevent the complete stroke of the movement of the motor piston, hindering the complete removal of the cutting arms 5 and 6.
Dans cette configuration, les bras de coupe partiellement exposés à l'extérieur du corps tubulaire principal 1 forment un obstacle à la remontée de l'outil, au moment du passage à l'endroit d'une restriction du diamètre du puits. La réaction sur les bras de coupe, due à l'effort de traction de l'outil bloqué par la restriction du diamètre du trou, transmet, par l'intermédiaire des coulisseaux 7, une force de rappel supplémentaire au piston moteur. L'accroissement de l'effet de compactage des particules dans le volume mort de la chambre 10 engendre une pression sur la bague 26. Cette force de pression sur la bague 26 provoque, au- delà d'un seuil prédéterminé, un cisaillement des goupilles 27 de cette bague 26. La bague n'étant plus solidaire du corps tubulaire principal 1 peut sous l'effet de la pression du compactage se déplacer vers le bas, en permettant alors le mouvement complet du piston moteur et par conséquence le retrait complet des bras de coupe.In this configuration, the cutting arms partially exposed outside the main tubular body 1 form an obstacle to the rise of the tool, at the time of passage at the location of a restriction of the diameter of the well. The reaction on the cutting arms, due to the tensile force of the tool blocked by the restriction of the diameter of the hole, transmits, via the sliders 7, an additional restoring force to the engine piston. The increase in the compacting effect of the particles in the dead volume of the chamber 10 generates a pressure on the ring 26. This pressure force on the ring 26 causes, beyond a predetermined threshold, a shear of the pins. 27 of the ring 26. The ring no longer secured to the main tubular body 1 can under the effect of the compaction pressure move downwards, while allowing the complete movement of the engine piston and consequently the complete withdrawal of cutting arm.
Avantageusement on peut prévoir de remplir les jeux entre pièces et les volumes morts de la mécanique par une graisse ou un gel déterminé. Cela permet d'empêcher la boue de forage de venir occuper ces volumes et de gêner le fonctionnement de l'outil. Il peut être
intéressant par conséquent de remplir la chambre annulaire en cul-de- sac 10 par une telle matière, cette chambre pouvant être considérée comme un volume mort.Advantageously, it is possible to fill the gaps between the pieces and the dead volumes of the mechanism by a determined grease or gel. This makes it possible to prevent the drilling mud from coming to occupy these volumes and to hinder the operation of the tool. He can be It is therefore interesting to fill the annular chamber in cul-de-sac 10 with such a material, this chamber can be considered as a dead volume.
Par ailleurs, on peut constater que les mouvements longitudinaux de la mécanique provoquent des variations de volume à divers endroits de l'outil, comme c'est le cas par exemple dans la chambre annulaire 10. Ces variations de volume engendrent des effets de succion et de rejet de la boue de forage avec les inconvénients connus précités. II est donc avantageux de dimensionner les pièces de façon à obtenir un volume mort le plus grand possible en comparaison de la variation de volume provoquée par les mouvements mécaniques, ceci afin de limiter les effets de compactage de la boue.Furthermore, it can be seen that the longitudinal movements of the mechanics cause volume variations at various locations of the tool, as is the case, for example, in the annular chamber 10. These variations in volume generate suction and discharge of the drilling mud with the aforementioned disadvantages. It is therefore advantageous to size the pieces so as to obtain the largest possible dead volume in comparison with the volume variation caused by the mechanical movements, in order to limit the effects of compaction of the sludge.
Il doit être entendu que la présente invention n'est en aucune façon limitée à la forme de réalisation décrite ci-dessus et que bien des modifications peuvent y être apportées sans sortir du cadre des revendications annexées.It should be understood that the present invention is in no way limited to the embodiment described above and that many modifications can be made without departing from the scope of the appended claims.
On peut par exemple prévoir que le piston et son extension tubulaire soient agencés de manière à subir de la part des boues de forage une pression dirigée vers le bas.
For example, it is possible for the piston and its tubular extension to be arranged so as to undergo downward pressure from the drilling muds.
Claims
1. Outil de fond comportant1. Background tool featuring
- un corps tubulaire (1) doté d'une cavité axiale (2),a tubular body (1) having an axial cavity (2),
- un piston creux (8) capable de coulisser dans ladite cavité axiale et soumis à des pressions hydrauliques différentielles variables, eta hollow piston (8) capable of sliding in said axial cavity and subjected to variable differential hydraulic pressures, and
- un dispositif d'activation du piston creux, caractérisé en ce que le dispositif d'activation comprenda device for activating the hollow piston, characterized in that the activation device comprises
- un élément de gâchette (14) solidaire du piston creux (8) qui est déplaçable depuis une position d'immobilisation du piston creux, dans laquelle l'élément de gâchette est retenu en butée, à rencontre desdites pressions différentielles, contre un appui du corps tubulaire, vers une position d'effacement dans laquelle l'élément de gâchette (14) n'est pas en butée contre ledit appui et libère le piston creux,a trigger element (14) integral with the hollow piston (8) which is movable from an immobilization position of the hollow piston, in which the trigger element is held in abutment, against said differential pressures, against a support of the tubular body, to an erasing position in which the trigger element (14) does not abut against said support and releases the hollow piston,
- un manchon tubulaire de détente (16) de l'élément de gâchette (14) qui, dans ladite position d'immobilisation dudit élément de gâchette, est relié au piston creux (8) par au moins une goupille de cisaillement (17) et empêche un déplacement de l'élément de gâchette de sa position d'immobilisation du piston creux à sa position d'effacement, et - un moyen d'obturation temporaire (23) du manchon tubulaire de détente (16) qui, en position d'obturation, provoque une élévation de pression hydraulique sur le manchon tubulaire (16), au-dessus d'un seuil prédéterminé où a lieu un cisaillement de ladite au moins une goupille de cisaillement (17), et un coulissement du manchon tubulaire de détente (16) dans une position de libération permettant un déplacement de l'élément de gâchette (14) de sa position d'immobilisation du piston creux (8) à sa position d'effacement.a tubular expansion sleeve (16) of the trigger element (14) which, in said position of immobilization of said trigger element, is connected to the hollow piston (8) by at least one shear pin (17) and prevents a displacement of the trigger element from its immobilization position of the hollow piston to its erasure position, and - a temporary closure means (23) of the tubular expansion sleeve (16) which, in the position of sealing, causes a hydraulic pressure rise on the tubular sleeve (16), above a predetermined threshold where shearing of said at least one shear pin (17) takes place, and a sliding of the tubular expansion sleeve ( 16) in a release position allowing a displacement of the trigger element (14) from its immobilization position of the hollow piston (8) to its erasing position.
2. Outil suivant la revendication 1 , caractérisé en ce que le manchon tubulaire de détente (16) est inséré entre l'élément de gâchette (14) solidaire du piston creux (8) et une extension (13) du piston creux, de manière à pouvoir coulisser entre eux après cisaillement de ladite au moins une goupille de cisaillement (17).2. Tool according to claim 1, characterized in that the tubular expansion sleeve (16) is inserted between the trigger member (14) integral with the hollow piston (8) and an extension (13) of the hollow piston, so as to slide between them after shearing said at least one shear pin (17).
3. Outil suivant la revendication 2, caractérisé en ce que le manchon tubulaire (16) comporte une première partie (18) à paroi présentant une première épaisseur et une deuxième partie (19) à paroi présentant une deuxième épaisseur inférieure à la première et en ce que, dans sa position d'immobilisation du piston creux, l'élément de gâchette (14) est en appui radialement sur ladite première partie de paroi (18) du manchon tubulaire et, dans sa position d'effacement, il est en appui radialement sur ladite deuxième partie de paroi (19).3. Tool according to claim 2, characterized in that the tubular sleeve (16) has a first wall portion (18) having a first thickness and a second wall portion (19) having a second thickness less than the first and in its position of immobilization of the hollow piston, the trigger element (14) rests radially on said first wall portion (18) of the tubular sleeve and, in its erasing position, it bears radially on said second wall portion (19).
4. Outil suivant la revendication 3, caractérisé en ce que, comme appui susdit, le corps tubulaire comporte une bague de retenue (21 ) faisant saillie radialement vers l'intérieur de ladite cavité axiale et en ce que, dans sa position d'immobilisation du piston creux (8), l'élément de gâchette (14) est en butée axialement contre ladite bague et, dans sa position d'effacement, il est entraîné par le piston creux libéré à l'intérieur de ladite bague (21).4. Tool according to claim 3, characterized in that, as aforesaid support, the tubular body comprises a retaining ring (21) projecting radially inwardly of said axial cavity and in that in its immobilization position of the hollow piston (8), the trigger element (14) abuts axially against said ring and, in its erasing position, is driven by the hollow piston released inside said ring (21).
5. Outil suivant l'une des revendications 3 et 4, caractérisé en ce que l'élément de gâchette (14) est formé d'une couronne de lames (15) qui s'étendent axialement autour de la première partie (18) du manchon tubulaire (16) en position d'immobilisation de l'élément de gâchette (14) et qui viennent en appui radialement sur ladite deuxième partie de paroi (19) lorsque l'élément de gâchette (14) est en position d'effacement. 5. Tool according to one of claims 3 and 4, characterized in that the trigger element (14) is formed of a ring of blades (15) which extend axially around the first portion (18) of the tubular sleeve (16) in immobilization position of the trigger element (14) and which bear radially on said second wall portion (19) when the trigger element (14) is in the erasing position.
6. Outil suivant la revendication 5, caractérisé en ce que les lames (15) de ladite couronne sont en acier à ressort.6. Tool according to claim 5, characterized in that the blades (15) of said ring are made of spring steel.
7. Outil suivant l'une des revendications 5 et 6, caractérisé en ce que les lames (15) susdites présentent une extrémité libre épaissie (20) qui fait saillie radialement vers l'extérieur et qui, en position d'immobilisation de l'élément de gâchette (14), sont en appui axial contre ladite bague de retenue (21 ). 7. Tool according to one of claims 5 and 6, characterized in that the blades (15) above have a thickened free end (20) which projects radially outwards and which, in the immobilization position of the trigger element (14) are in axial abutment against said retaining ring (21).
8. Outil suivant l'une quelconque des revendications 1 à 7, caractérisé en ce que le moyen d'obturation temporaire (23) est une bille lancée dans ladite cavité axiale (2) et en ce que le manchon tubulaire de détente (16) comporte un siège (22) pour recevoir cette bille et des ouvertures latérales (24) permettant de rétablir une circulation de fluide hydraulique lorsque le manchon tubulaire (16) est dans sa position de libération.8. Tool according to any one of claims 1 to 7, characterized in that the temporary closure means (23) is a ball launched into said axial cavity (2) and in that the tubular expansion sleeve (16) comprises a seat (22) for receiving this ball and lateral openings (24) for restoring a flow of hydraulic fluid when the tubular sleeve (16) is in its release position.
9. Outil suivant l'une quelconque des revendications 1 à 8, caractérisé en ce qu'il est un élargisseur muni d'éléments de couteau (4) formés de bras de coupe (5, 6) articulés entre eux et en ce que le piston creux (8) est un moyen moteur permettant une extension des bras de coupe hors du corps tubulaire (1 ) de l'outil.9. Tool according to any one of claims 1 to 8, characterized in that it is an enlarger provided with knife elements (4) formed of cutting arms (5, 6) hinged together and that the hollow piston (8) is a motor means for extending the cutting arms out of the tubular body (1) of the tool.
10. Outil suivant la revendication 9, caractérisé en ce qu'il comprend en outre un ressort de rappel (12) qui agit sur le piston creux (8) pour le ramener en direction de sa position d'immobilisation, dans laquelle lesdits bras de coupe sont en position de retrait.10. Tool according to claim 9, characterized in that it further comprises a return spring (12) which acts on the hollow piston (8) to return it towards its immobilization position, wherein said arms of cut are in the retracted position.
11. Outil suivant la revendication 10, caractérisé en ce que le ressort de rappel (12) est agencé autour d'une extension tubulaire (13) du piston creux de manière à prendre appui sur elle. 11. Tool according to claim 10, characterized in that the return spring (12) is arranged around a tubular extension (13) of the hollow piston so as to bear against it.
12. Outil suivant l'une quelconque des revendications 1 à12. Tool according to any one of claims 1 to
11 , caractérisé en ce que lesdites pressions hydrauliques variables agissant sur le piston creux (8) sont dirigées vers le haut.11, characterized in that said variable hydraulic pressures acting on the hollow piston (8) are directed upwards.
13. Outil suivant l'une quelconque des revendications 1 à13. Tool according to any one of claims 1 to
12, caractérisé en ce qu'il comprend en outre - une chambre en cul-de-sac (10) qui s'étend annulairement entre ledit corps tubulaire (1 ) et ledit piston creux (8) et/ou une extension tubulaire (13) de celui-ci où passent des boues de forage, une surface (11 ) du piston creux limitant axialement cette chambre en cul-de-sac, d'un premier côté, - une bague annulaire (26) ,qui limite axialement la chambre en cul-de- sac (10), d'un second côté opposé au premier susdit, et qui est reliée au corps tubulaire par au moins une goupille de cisaillement (27),12, characterized in that it further comprises - a cul-de-sac chamber (10) which extends annularly between said tubular body (1) and said hollow piston (8) and / or a tubular extension (13). ) of the latter where drilling muds pass, a surface (11) of the hollow piston axially limiting this dead-end chamber, a first side, - an annular ring (26), which axially limits the bag-shaped chamber (10), a second side opposite to the aforesaid first, and which is connected to the tubular body by at least one shear pin (27) ,
- une communication pour fluide (25) entre l'intérieur du piston creux (8) et/ou de son extension tubulaire (13) et la chambre en cul-de-saca fluid communication (25) between the interior of the hollow piston (8) and / or its tubular extension (13) and the dead-end chamber
(10), ladite surface (11) du piston creux étant ainsi soumise auxdites pressions hydrauliques différentielles variables desdites boues de forage,(10), said surface (11) of the hollow piston being thus subjected to said variable differential hydraulic pressures of said drilling muds,
- le piston creux (8), libéré par effacement dudit élément de gâchette (14), étant capable de coulisser entre une première position dans laquelle la chambre en cul-de-sac (10) présente un premier volume et une deuxième position dans laquelle la chambre en cul-de-sac présente un deuxième volume supérieur au premier, ainsi quethe hollow piston (8), released by erasing said trigger element (14), being capable of sliding between a first position in which the cul-de-sac chamber (10) has a first volume and a second position in which the cul-de-sac chamber has a second volume greater than the first, as well as
- des moyens de rappel (4, 5, 6, 7, 12) qui agissent sur le piston creux pour le ramener à sa première position, ladite au moins une goupille de cisaillement (27) étant, lorsqu'un obstacle empêche le piston creux de retourner à sa première position et augmente ainsi la pression appliquée sur la bague annulaire au-delà d'un seuil prédéterminé, cisaillée en libérant la bague annulaire (26) et en permettant ainsi un retour du piston creux à sa première position.- return means (4, 5, 6, 7, 12) which act on the hollow piston to return it to its first position, said at least one shear pin (27) being, when an obstacle prevents the hollow piston to return to its first position and thus increases the pressure applied to the annular ring beyond a predetermined threshold, sheared by releasing the annular ring (26) and thus allowing a return of the hollow piston to its first position.
14. Outil suivant la revendication 13, caractérisé en ce qu'il présente des jeux entre pièces et des volumes morts et ce que ces jeux et volumes morts sont remplis d'une graisse ou d'un gel.14. Tool according to claim 13, characterized in that it has games between parts and dead volumes and that these games and dead volumes are filled with a grease or a gel.
15. Outil suivant la revendication 14, caractérisé en ce que la chambre en cul-de-sac (10) susdite est un volume mort de l'outil. 15. Tool according to claim 14, characterized in that the cul-de-sac chamber (10) aforesaid is a dead volume of the tool.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/BE2007/000004 WO2008083448A1 (en) | 2007-01-11 | 2007-01-11 | Device or actuating a bottom tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2102443A1 true EP2102443A1 (en) | 2009-09-23 |
| EP2102443B1 EP2102443B1 (en) | 2010-08-11 |
Family
ID=38476902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07701581A Not-in-force EP2102443B1 (en) | 2007-01-11 | 2007-01-11 | Device or actuating a bottom tool |
Country Status (8)
| Country | Link |
|---|---|
| US (2) | US8251161B2 (en) |
| EP (1) | EP2102443B1 (en) |
| CN (1) | CN101636551B (en) |
| AT (1) | ATE477396T1 (en) |
| CA (1) | CA2674030C (en) |
| DE (1) | DE602007008471D1 (en) |
| NO (1) | NO20092683L (en) |
| WO (1) | WO2008083448A1 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004071767A1 (en) | 2003-02-11 | 2004-08-26 | Agfa-Gevaert | Heat-sensitive lithographic printing plate precursor. |
| EP1826001A1 (en) | 2006-02-28 | 2007-08-29 | Agfa Graphics N.V. | A heat-sensitive positive-working lithographic printing plate precursor |
| EP1854627A1 (en) | 2006-05-12 | 2007-11-14 | Agfa Graphics N.V. | Method for making a lithographic printing plate |
| EP2366545A1 (en) | 2010-03-19 | 2011-09-21 | Agfa Graphics N.V. | A lithographic printing plate precursor |
| WO2013034474A1 (en) | 2011-09-08 | 2013-03-14 | Agfa Graphics Nv | Method of making a lithographic printing plate |
| WO2014106554A1 (en) | 2013-01-01 | 2014-07-10 | Agfa Graphics Nv | (ethylene, vinyl acetal) copolymers and their use in lithographic printing plate precursors |
| EP2933278A1 (en) | 2014-04-17 | 2015-10-21 | Agfa Graphics Nv | (Ethylene, vinyl acetal) copolymers and their use in lithographic printing plate precursors |
| EP2944657A1 (en) | 2014-05-15 | 2015-11-18 | Agfa Graphics Nv | (Ethylene, Vinyl Acetal) Copolymers and Their Use In Lithographic Printing Plate Precursors |
| EP2955198A1 (en) | 2014-06-13 | 2015-12-16 | Agfa Graphics Nv | (Ethylene, vinyl acetal) copolymers and their use in lithographic printing plate precursors |
| EP2963496A1 (en) | 2014-06-30 | 2016-01-06 | Agfa Graphics Nv | A lithographic printing plate precursor including ( ethylene, vinyl acetal ) copolymers |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1884372B1 (en) | 2006-08-03 | 2009-10-21 | Agfa Graphics N.V. | A lithographic printing plate support |
| DE602007008471D1 (en) | 2007-01-11 | 2010-09-23 | Halliburton Energy Services N | DEVICE FOR ACTUATING A DRILLING TOOL |
| ATE516953T1 (en) | 2007-04-27 | 2011-08-15 | Agfa Graphics Nv | LITHOGRAPHY PRINTING PLATE PRECURSOR |
| EP2159049B1 (en) | 2008-09-02 | 2012-04-04 | Agfa Graphics N.V. | A heat-sensitive positive-working lithographic printing plate precursor |
| US9022117B2 (en) | 2010-03-15 | 2015-05-05 | Weatherford Technology Holdings, Llc | Section mill and method for abandoning a wellbore |
| US8469106B2 (en) * | 2010-07-26 | 2013-06-25 | Schlumberger Technology Corporation | Downhole displacement based actuator |
| US8936099B2 (en) | 2011-02-03 | 2015-01-20 | Smith International, Inc. | Cam mechanism for downhole rotary valve actuation and a method for drilling |
| CN102155164B (en) * | 2011-02-24 | 2013-06-05 | 平顶山五环实业有限公司 | Thrust auxiliary reamer bit |
| CN104736793B (en) * | 2012-09-18 | 2017-05-03 | 国际壳牌研究有限公司 | Expansion assembly, top anchor and method for expanding a tubular in a wellbore |
| US9938781B2 (en) | 2013-10-11 | 2018-04-10 | Weatherford Technology Holdings, Llc | Milling system for abandoning a wellbore |
| GB201409816D0 (en) * | 2014-06-01 | 2014-07-16 | Wojciech Buczak | Through tubing reamer |
| MX2017005771A (en) * | 2014-12-01 | 2017-07-28 | Halliburton Energy Services Inc | Flow controlled ball release tool. |
| US10487602B2 (en) * | 2015-03-24 | 2019-11-26 | Halliburton Energy Services, Inc. | Hydraulic control of downhole tools |
| US10801285B2 (en) | 2016-12-22 | 2020-10-13 | Shell Oil Company | Retrievable self-energizing top anchor tool |
| CA3077491A1 (en) | 2020-03-30 | 2021-09-30 | Plainsman Mfg. Inc. | Shear coupling and method of assembling same |
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- 2007-01-11 WO PCT/BE2007/000004 patent/WO2008083448A1/en active Application Filing
- 2007-01-11 AT AT07701581T patent/ATE477396T1/en not_active IP Right Cessation
- 2007-01-11 CA CA2674030A patent/CA2674030C/en not_active Expired - Fee Related
- 2007-01-11 CN CN200780049705.0A patent/CN101636551B/en not_active Expired - Fee Related
- 2007-01-11 US US11/995,495 patent/US8251161B2/en active Active
- 2007-01-11 EP EP07701581A patent/EP2102443B1/en not_active Not-in-force
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004071767A1 (en) | 2003-02-11 | 2004-08-26 | Agfa-Gevaert | Heat-sensitive lithographic printing plate precursor. |
| EP1826001A1 (en) | 2006-02-28 | 2007-08-29 | Agfa Graphics N.V. | A heat-sensitive positive-working lithographic printing plate precursor |
| EP1854627A1 (en) | 2006-05-12 | 2007-11-14 | Agfa Graphics N.V. | Method for making a lithographic printing plate |
| EP2366545A1 (en) | 2010-03-19 | 2011-09-21 | Agfa Graphics N.V. | A lithographic printing plate precursor |
| WO2011113693A1 (en) | 2010-03-19 | 2011-09-22 | Agfa Graphics Nv | A lithographic printing plate precursor |
| WO2013034474A1 (en) | 2011-09-08 | 2013-03-14 | Agfa Graphics Nv | Method of making a lithographic printing plate |
| WO2014106554A1 (en) | 2013-01-01 | 2014-07-10 | Agfa Graphics Nv | (ethylene, vinyl acetal) copolymers and their use in lithographic printing plate precursors |
| EP2933278A1 (en) | 2014-04-17 | 2015-10-21 | Agfa Graphics Nv | (Ethylene, vinyl acetal) copolymers and their use in lithographic printing plate precursors |
| EP2944657A1 (en) | 2014-05-15 | 2015-11-18 | Agfa Graphics Nv | (Ethylene, Vinyl Acetal) Copolymers and Their Use In Lithographic Printing Plate Precursors |
| EP2955198A1 (en) | 2014-06-13 | 2015-12-16 | Agfa Graphics Nv | (Ethylene, vinyl acetal) copolymers and their use in lithographic printing plate precursors |
| WO2015189092A1 (en) | 2014-06-13 | 2015-12-17 | Agfa Graphics Nv | (ethylene, vinyl acetal) copolymers and their use in lithographic printing plate precursors |
| EP2963496A1 (en) | 2014-06-30 | 2016-01-06 | Agfa Graphics Nv | A lithographic printing plate precursor including ( ethylene, vinyl acetal ) copolymers |
| WO2016001023A1 (en) | 2014-06-30 | 2016-01-07 | Agfa Graphics Nv | A lithographic printing plate precursor including (ethylene, vinyl acetal) copolymers |
Also Published As
| Publication number | Publication date |
|---|---|
| US20120318497A1 (en) | 2012-12-20 |
| US20100126715A1 (en) | 2010-05-27 |
| ATE477396T1 (en) | 2010-08-15 |
| US8251161B2 (en) | 2012-08-28 |
| EP2102443B1 (en) | 2010-08-11 |
| WO2008083448A1 (en) | 2008-07-17 |
| US8936112B2 (en) | 2015-01-20 |
| CA2674030C (en) | 2015-06-30 |
| NO20092683L (en) | 2009-10-06 |
| CN101636551A (en) | 2010-01-27 |
| CN101636551B (en) | 2012-07-11 |
| CA2674030A1 (en) | 2008-07-17 |
| DE602007008471D1 (en) | 2010-09-23 |
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