Abstract: A variable stiffness device includes a first elongated member in a hollow shape extending along a longitudinal axis, and a second elongated member including a heater, disposed inside an inner circumference of the first elongated member, and extending in parallel to the first elongated member along the longitudinal axis. The first elongated member includes a high bending stiffness portion and a low bending stiffness portion alternately aligned along the longitudinal axis. One of the first elongated member and the second elongated member includes a shape-memory pipe. The heater extends through an inner space of the shape-memory pipe and configured to heat the shape-memory pipe to increase stiffness of the shape-memory pipe.

Abstract: A segmented backup ring including a plurality of individual segments each having curved surfaces that define an arcuate portion of the ring, each segment including a body section having the arcuate profile and defining a receptacle therein having a circumferential dimension, a projection section having a head portion and a neck portion and extending from the body section in a circumferential direction of the ring, the projection section being receivable and retainable in the receptacle of an adjacent segment body section, and the head portion having a dimension in line with the circumferential direction of the ring that is shorter than the circumferential dimension of the receptacle.

Abstract: A bridge plug assembly includes a tee bushing including a base and a stem, a coned bushing having a conical section and defining a bore that is configured to receive the stem, a molded assembly that is moveable over the conical section from an initial position to a set position, and a seal. The conical section is configured as a wedge such that when the stem is forced into the conical section during a setting process, the molded assembly and the seal move over the conical section from the initial position to the set position and expand radially outward by a wedge action of the conical section against a well casing. The molded assembly includes a slip assembly having a plurality of slip segments, over-molded with an elastomer. All components are made of dissolvable materials so as to reopen the well casing over time to its original inner diameter.

Abstract: A slip and cone arrangement including a mandrel having a groove, the groove having a run in end and a set end, a deepest portion of the groove on the run in end having a distance from a longitudinal axis of the mandrel that is less than a deepest portion of the groove on the set end; and a slip disposed in the groove, the slip having a radially inward surface having a convex portion in nested contact with the groove.

Abstract: A drag block for retaining slips on a tool includes a body having a substantially annular outer surface and a substantially annular inner surface, and a plurality of drag block members resiliently mounted to the substantially annular outer surface. Each of the plurality of drag block members includes a support element and a block element. The support element has a first end fixedly mounted to the substantially annular outer surface and a second, cantilevered end. The drag block is mounted to the second cantilevered end.

Abstract: A technique facilitates use of a liner hanger in a wide variety of environments by distributing loading. The liner hanger may comprise a liner hanger cone, e.g. an annular cone body, having a plurality of slots for receiving corresponding pipe-gripping slips. The slip slots and the corresponding pipe-gripping slips are staggered both longitudinally and circumferentially to distribute loading. An actuator may be used to shift the slips into gripping engagement with a surrounding pipe, e.g. casing, to improve the load distribution on the surrounding pipe and liner hanger cone once the liner is supported.

Abstract: A tubing hanger system for suspending a tubing string within a wellbore is provided. The system is designed to place the tubing string in tension. The tubing hanger system comprises a tubing hanger and a tubing anchor. Both the tubing hanger and the tubing anchor are designed to reside in series with the production tubing. The tubing hanger is threadedly connected to the tubing string at the top of the wellbore. The tubing anchor is also threadedly connected to the tubing string but is configured to be set within a string of casing downhole. Beneficially, the tubing hanger and the tubing anchor is each uniquely configured to be set through a rotation of the tubing string that is less than one full rotation. This enables use of a stainless steel chemical injection line extending from the tubing hanger to the tubing anchor. A method for hanging a string of production tubing in a wellbore, in tension, is also provided herein.

Abstract: An anchoring tool is presented having radially pivoting arms which are moved from a run-in position to a set position. In the run-in position the un-articulated arms are positioned radially inward to provide a small tool outer diameter. Upon setting, the arms are pivoted radially outward into gripping engagement with a downhole tubular, such as a liner or casing. The pivot arms define a cam surface for interaction with corresponding wedges, where the cam surface allows for greater radial expansion of the arms.

Abstract: The invention provides a downhole apparatus (100) for positioning a tool or toolstring (10) in a wellbore and a method of use. The apparatus comprises a body (102) configured to be coupled to a tool or toolstring to be positioned in the wellbore. A plurality of support elements (108) is located on the body, the support elements comprising a first retracted position and a second open position. In the open position the support elements define one or more support surfaces. When the apparatus is lowered in a wellbore the one or more support surfaces of the support elements are configured to contact a restriction in the wellbore to support the apparatus in the wellbore and prevent downward movement of the apparatus in the wellbore past the restriction.

Abstract: An antirotation stabilizer may include one or more antirotation pads extending from a stabilizer body. Each antirotation pad may be positioned at least partially within a recess formed in the stabilizer body. Each antirotation pad may be coupled to a torsion bar. The torsion bar may couple between the antirotation pad and the stabilizer body and may be under torsional loading such that the antirotation pad is extended from the stabilizer body. The antirotation stabilizer may include one or more rollers.

Abstract: The disclosure provides a downhole anchoring apparatus for use in a downhole tool. An example downhole anchoring apparatus may include a housing with a hub provided within the housing. The hub may be arranged to rotate in a bidirectional fashion about a longitudinal axis. The downhole anchoring apparatus may also include a deployment linkage. The deployment linkage may be coupled to the hub by a hinge so that when the hub is rotated in a first direction, a distal end of the deployment linkage is extended radially outward from the central axis, and when the hub is rotated in a second direction, the distal end of the deployment linkage is retracted toward the central axis.

Abstract: The present invention relates to a rod clamping device, and a rod clamping device for clamping a rod to a driving shaft provided at a head part moving along a lead of a boring machine comprises: a housing coupled to the driving shaft; a locking member screw-coupled to the housing and moving forward and backward according to the forward and reverse rotations of the housing coupled to the driving shaft; a supporting part supported by the housing; and a collet unit extended from the supporting part and inserted into a hollow part of the rod, and including a plurality of collet parts for holding and releasing the rod according to the forward and backward movements of the locking member. The rod clamping device, according to the present invention, can hold the rod by expanding the outer diameter of the collet unit inserted into the rod, and thus can more easily replace the rod.

Abstract: A method and apparatus generally concerning the treatment of hydrocarbon-bearing formations adjacent a wellbore. In one embodiment, fracturing jobs are performed through the use of subs disposed in a casing string having profiles that interact with profiles formed on retractable keys of a tool.

Abstract: A method concerning the treatment of hydrocarbon-bearing formations adjacent a wellbore. In one embodiment, fracturing jobs are performed through the use of subs disposed in a casing string having profiles that interact with profiles formed on retractable keys of a tool.

Abstract: A capillary injection system delivers chemical with a capillary string to a targeted area in a wellbore such as adjacent a rod pump of a reciprocating pump system. The capillary string is disposed along the production string and delivers the chemical downhole. A tubing anchor disposed on the production string anchors the production string in tension in the casing. The tubing anchor has a mandrel coupled to the production string and has a housing disposed on the mandrel. The mandrel accommodates the capillary string outside thereof and defines a guide slot for controlling relative movement of the mandrel and the housing engaged with the guide slot. The housing has a slip movable outward from the mandrel. The mandrel is in a set condition is moved axially in the guide slot, and the slip is moved outward from the mandrel against the casing.

Abstract: A flexible collet on a subterranean tool has sacrificial soft components to protect seal bores through which the collets have to compress to get through. The sacrificial components can be replaced when the tool is removed to the surface. In one embodiment, threaded fasteners are used alone or with washers for height adjustment such that the heads of the fasteners which are softer than the seal bore material ride on the seal bore and take the wear. The tool can ultimately be used to latch into shifting sleeves to move such sleeves to open or close wall ports. Alternatively axial ridges with beveled profile ends can be used or rolling members such as wheels or balls can be used to keep sharp edges off the seal bore. EDM method can be used to create multiple fingers with an axial ridge profile and rounded end transitions.

Abstract: An anchoring system for use with a downhole tool includes a body with anchor members mounted on the body that pivot radially outward from the body and into engagement with an inner surface of a tubular. Curved slots are provided along a portion of the members and a sliding block has a protrusion that projects into the slots. The slots are curved so that when the block is urged axially within the body, the interaction between the slots and protrusions pivots the members radially outward. A piston is urged through the body to drive the block. Optionally, an elongate helical gear may cooperate with grooves formed in an edge of the members so that rotating the gear pivots the members radially outward.

Abstract: An inner surface regulation tool includes a mandrel, a plug which is detachably connected to the mandrel, and a connection member which connects the plug and the mandrel by a magnetic force. One of the plug and the mandrel includes a column-shaped portion which extends in an axial direction of the one, and the other of the plug and the mandrel includes a joining hole which extends in an axial direction of the other and into which the column-shaped portion is inserted. In addition, the connection member is a permanent magnet which is attached to at least one of the column-shaped portion and the joining hole.

Abstract: The lower end assembly of a measurement while drilling tool is secured against shock and vibration while drilling through the use of a locking cuff, an abrasion ring and a locking nut. A mule shoe at a lower end of the assembly has a diameter sized to allow a pulser helix to pass. The locking cuff is installed on one end of the mule shoe. A poppet housing is attached to an end of the pulser helix opposite the mule shoe. An abrasion ring is received about the external diameter of the pulser helix and is received on a shoulder located between the pulser helix and the poppet housing. An externally threaded lower end of the locking nut is received within a mating threaded bore in the extended locking cuff so that a portion of the locking nut is located between the locking cuff and the poppet housing. Tightening the locking nut within the bore of the locking cuff acts to lock the lower end assembly with respect to the mule shoe.

Abstract: An apparatus and method are for cutting and pulling of a casing in a well. The apparatus comprises a housing connected to a wired connection, a cutting tool arranged in connection with the housing, where said cutting tool is rotatable around the longitudinal axis of the housing and arranged to be able to provide at least one cut-out in the wall of the casing and to be able to cut the casing, and a holding device for controlled holding of the housing in the casing. The apparatus is provided with at least one radially displaceable gripping means arranged to go into engagement with the at least one cut-out in the wall of the casing.

Abstract: The present invention provides a system for anchoring an expandable tubular to a borehole wall. The system comprises a support member having a first end fixed relative to the outside of the tubular and a second end comprising a ramping surface. An anchor member has a first end fixed relative to the outside of the tubular and a second end extending toward the support member, said second end being movable relative to the outside of the tubular. Said support member includes a ramp surface that tapers in the direction of said anchor member. Expansion of the portion of the expandable tubular between the first support end and the first anchor end causes the axial device length to shorten, wherein the difference in length is sufficient to cause the second anchor end to move radially outward and engage the borehole wall as a result of engagement with said ramping surface.

Abstract: The present invention provides a system for anchoring an expandable tubular to a borehole wall. The system comprises a support member having a first end fixed relative to the outside of the tubular and a second end comprising a ramping surface. An anchor member has a first end fixed relative to the outside of the tubular and a second end extending toward the support member, said second end being movable relative to the outside of the tubular. Said support member includes a ramp surface that tapers in the direction of said anchor member. Expansion of the portion of the expandable tubular between the first support end and the first anchor end causes the axial device length to shorten, wherein the difference in length is sufficient to cause the second anchor end to move radially outward and engage the borehole wall as a result of engagement with said ramping surface.

Abstract: An anchor mechanism for use in a well including a housing with a plurality of openings evenly distributed along the circumference of the housing and each opening arranged to narrowly house a radially movably slip including first and second end portions, a gripping side facing a well wall, the gripping side being provided with a plurality of teeth, an underside facing the opposite direction, two side faces extending from the gripping side to the underside and to two end faces; the slip having, at its first and second end portions, with a first inclined face and a second inclined face substantially sloping from the end faces and towards the middle portion of the slip on the underside; the slip provided, on its end faces, with laterally projecting tongues having a longitudinal direction parallel to the inclined faces; the slip provided, on its two side faces, with guide portions exhibiting a longitudinal direction perpendicular to the longitudinal direction of the slip and the guide portion complementarily fitti

Abstract: A system for anchoring an expandable tubular to a borehole wall comprises a support member having a first end fixed relative to the outside of the tubular and a second end comprising a ramping surface. An anchor member has a first end fixed relative to the outside of the tubular and a second end extending toward the support member, the second end being movable relative to the outside of the tubular. The support member includes a ramp surface that tapers in the direction of the anchor member. Expansion of the portion of the expandable tubular between the first support end and the first anchor end causes the axial device length to shorten, wherein the difference in length is sufficient to cause the second anchor end to move radially outward and engage the borehole wall as a result of engagement with the ramping surface.

Abstract: A liner hanger includes a mandrel and a slip assembly disposed around the mandrel, wherein the slip assembly includes an expandable non-frangible slip ring and a plurality of gripping members. A liner top packer includes a mandrel, a slip assembly disposed around the mandrel, and a sealing element disposed around the mandrel, wherein the slip assembly includes an expandable non-frangible slip ring and a plurality of gripping members disposed circumferentially around the expandable non-frangible slip ring. A method for setting a tool in a wellbore includes running the tool having a slip assembly disposed around a mandrel of the tool into the wellbore, positioning the tool at a predetermined wellbore location, actuating the tool to impart a force on the slip assembly, and expanding the expandable non-frangible slip ring from a first diameter to a second diameter to displace the gripping members radially outward into engagement with a surrounding surface.

Abstract: A downhole tool slip mechanism including a cone, cage, and slip disposed on a mandrel. The cone and cage can be move in relation to one another, and the cone may be locked into place during run-in and retrieval downhole. The cage contains slip slots contains a spring retaining finger for a spring that resides between the retention finger and the slip. This spring serves to bias the slip inward during run-in and retrieval. The slip slots have load-bearing shoulders used to engage the slip during retrieval. The slips outer surface is completely covered in wickers so that the slip can sustain greater loads when set in place. Additionally, the slip has load-bearing shoulders with an increased thickness cross-section to sustain greater loads during retrieval while minimizing slip and cage failures.

Abstract: A downhole apparatus and assembly for use in a well bore and associated method are disclosed. The downhole apparatus includes a mandrel, a first slip, and a second slip, both slips being disposed on the mandrel. The slips are configured to grippingly engaging the well bore when in a set position. A packer cup is also disposed on the mandrel. The packer cup is provided for sealing an annulus between the mandrel and the well bore. The packer cup is slidable relative to the mandrel, and can be controlled to slide along the mandrel in order to move the slip to the set position. The downhole assembly includes a downhole tool and a setting apparatus. The setting apparatus can be used to lower the downhole apparatus to a desired setting depth and then to release the downhole apparatus.

Abstract: A liner hanger has slips held by a slip body. A potential energy force to move the slips axially when the hanger is in position is selectively released. The nature of the loading between the slips and the casing changes from a radial reaction force from the casing going into the slip and then distributed circumferentially to the slip housing to an essentially axial loading of the slip housing down onto the slip that has penetrated the casing with an opposite reaction force in the casing wall. The contact location between the slip housing and the slip is made broader at the slip end with a wider portion having an undercut to reduce contact stress and to aid in promoting flow past the set slip. The slip housing also has axial flow channels that interact with the undercut to promote flow past the set slips.

Abstract: A slip assembly for a downhole tool, such as a bridge plug, has a slip body composed of independent segments. The segments are affixed together along their longitudinal sides by a bond, which can be composed of thermoplastic or thermoset resins, an elastomer, epoxy adhesives, bonding agent manufactured using ceramic, metallic agent, or a combination of these. The surface area over which the bonding agent is applied can be controlled for a particular implementation. Thus, more or less of the longitudinal sides of the segments can be bonded to other segments. This provides greater control of the required force to break the bond itself, which can be tailored as desired.

Abstract: A weight down system comprises a wellbore comprising a plurality of restrictions, and a weight down tool. The weight down tool comprises a central mandrel configured to be coupled to a wellbore tubular, an outwardly extending indicator disposed about the central mandrel, and a plurality of radially expandable weight down lugs configured to selectively transition between an expanded position and a retracted position. The indicator is configured to expand the weight down lugs into the expanded position in response to moving through one or more restrictions of the plurality of restrictions in an upwards direction, and the weight down lugs are configured to retract to the retracted position in response to the weight down lugs moving through one or more restrictions of the plurality of restrictions in an upwards direction.

Abstract: A method is provided of radially expanding a tubular element (56) in a well-bore using an expander located in the tubular element, the expander (40) comprising an expansion member (48) and a plurality of segments (50) spaced in circumferential direction around the expansion member, the segments being movable between a radially retracted position and a radially expanded position by axial movement of the expansion member relative to the segments. The method includes a plurality of successive expansion cycles, wherein each expansion cycle comprises the steps of: (a) moving the expander (40) in axially forward direction through the tubular element (56) whereby the segments (56) are in the radially retracted position; and (b) radially expanding the tubular element by moving the segments to the radially expanded position by axially moving the expansion member relative to the segments.

Abstract: An expansion tool for use in a wellbore includes an expansion surface made up of a concave portion, a convex portion and a straight section therebetween. The straight section is formed according to a formula Y=(1.26) (X)?0.13, where X is the wall thickness of a tubular and Y is the length of the straight section. The concave portion and the convex portion have an arc length extending the concave portion to a trailing edge of the tool. The concave and convex portions are radius-shaped. The arrangement of the shapes and their relation to each other reduces relatively high and low contact pressures and lessens the effects of axial bending in a tubular or a connection.

Abstract: A swage is made from segments that slide relatively to each other to go from a run in dimension to a maximum or built dimension when the segments move into alignment. The angle of inclination of the sliding axis between the members is less than the swaging angle for the pipe on the exterior of the segments so that once the segments are aligned and driven into a tubular for swaging they are precluded from extending into misalignment to clear an obstruction. In this manner a minimum drift is provided or the swage simply stalls. The swage in a tubular goes to the predetermined maximum dimension using the sliding surfaces that are at an angle to bear the radial reaction forces from the tubular more directly, thereby reducing the contact forces and the resulting friction. The edge connections reduce bending which can cause segment binding as the swage is built in the tubular.

Abstract: A downhole tool includes a first portion having a first metal protrusion configured to seal against a first metal surface and a second portion having a second metal protrusion configured to seal against a second metal surface. A ratcheting device includes a first element having a plurality of grooves, and a second element having at least two sets of teeth, wherein one of the at least two sets of teeth engages the plurality of grooves. Additionally, a method of forming a downhole seal includes disposing in a wellbore a downhole tool including an inner tubular, a lock ring, a lower ring, an upper ring, an insert ring, and a deformable element. The method further includes moving a wedge sleeve axially downward with respect to the downhole tool such that the wedge sleeve engages the deformable ring and forces a first metal protrusion on the deformable element into contact with an outer tubular.

Abstract: A technique facilitates use of frangible components. The frangible components may comprise components of a gripping tool, e.g. anchor, used in a variety of applications, including well related applications. The tool is provided with a plurality of gripping members which each comprise a frangible structure. The gripping members may be selectively deployed to provide the desired gripping within a tubular structure, e.g. an open wellbore or well casing. The frangible structure in each gripping member is designed to break down into smaller portions after being exposed to a predetermined input, thus facilitating removal of the tool from the tubular structure.

Abstract: An anchor and a method for limiting the movement of a tubing string within a wellbore are provided. The anchor comprises a mandrel, a slip body assembly, a drag block assembly, and a mechanism for transitioning the anchor between a release position and a set position. The mechanism is operable by relative movement between the drag block assembly and the mandrel. The anchor is transitionable between the release position and the set position by rotating the mandrel less than half a full turn relative to the drag block assembly.

Abstract: A plurality of rows of locking dogs are provided with housing flexibility between rows to allow them to share a shear loading while leaving enough structural integrity in the housing to define the windows through which the dogs emerge. The dogs can also have extensions with a surface that grippingly engages the housing adjacent the window on extension of the dogs such that loads can transfer from the housing into the extension and into the profile in which the dog is disposed rather than passing the shear stress through the window edge into the dog that is in the profile. The dog configuration can also share the load on multiple contact surfaces of the housing to reduce stress at each contact location.

Abstract: A non-damaging slip assembly includes slips having grit on a smooth surface, the slips preferably made from a ductile material, such that the slips do not cause damage to the wall of a tubular when the slips are set. The slips fail under tensile force during setting. The cone used to expand the slips may have slits that narrow during setting of the slips. The slip assembly may be used to anchor a variety or devices inside a tubular. A drillable, non-damaging bridge plug using the non-damaging slip assembly has a threaded mandrel holding the cone by threads inside the cone. When the slips are set, the slits in the cone narrow such that threads in the cone do not allow rotation of the slips as they are drilled. The bridge plug can be drilled by a PDC bit without damaging the tubular.

Abstract: A system for anchoring an expandable tubular to a borehole wall. The system comprises a support member having a first end fixed relative to the outside of the tubular and a second end comprising a ramping surface. An anchor member has a first end fixed relative to the outside of the tubular and a second end extending toward the support member, the second end being movable relative to the outside of the tubular. The support member includes a ramp surface that tapers in the direction of the anchor member. Expansion of the portion of the expandable tubular between the first support end and the first anchor end causes the axial device length to shorten, wherein the difference in length is sufficient to cause the second anchor end to move radially outward and engage the borehole wall as a result of engagement with the ramping surface.

Abstract: A slip assembly (60) for securing a tool in a well includes an upper and a lower c-ring slip body (12, 14) each including an outer gripping surface (16, 18) and inner gripping surface (20, 22). An actuator member (68) is axially movable relative to both slip bodies and includes a camming surface (70) for engagement with the upper and lower slip bodies. The slip assembly withstands high axial loads, and forces are equally distributed between the slip bodies.

Abstract: A system for performing a downhole operation including a tubular string having a locking profile non-movably located therewith. At least one member is movably mounted with the string and includes an engagement profile. A tool is runnable with the string and has at least one sub with a key. The key is selectively engagable and disengagable with the engagement profile for enabling the tool to control movement of the member with respect to the string when engaged therewith. The key is engagable with the locking profile for restricting relative movement between the string and the tool when engaged therewith. A method of performing a downhole operation is also included.

Abstract: A downhole hydraulically powered tool (10) moves an expander (36) in a well to radially expand a downhole tubular. The tool includes a plurality of fluid-powered pistons (16, 20) for axially stroking the expander relative to a tool mandrel (12), and one or more slips (52) for axially securing the tool in the well. The tool mandrel is rotatably secured to the tubular to rotate with the tubular, thereby rotating a bit (60) at the lower end of the tubular. The expander is moved axially downward in response to axial movement of the pistons to radially expand the tubular after at least a portion of the well is drilled with the bit and while the slips secure the tool in the well.

Abstract: A technique enables anchoring of a tool in a wellbore. The technique provides traction against a well component without creating high stress concentrations that weaken the well component. An anchoring device comprises anchoring members that are selectively movable to an expanded configuration for anchoring the tool. The anchoring members have traction surfaces able to selectively engage a smooth anchoring surface of the well component at any desired location along the well component. Each traction surface is formed to facilitate traction while minimizing stress concentration.

Abstract: A downhole apparatus and for use in a well bore and associated method are disclosed. The downhole apparatus includes a center mandrel. A slip means is disposed on the mandrel. The slip means can include teeth or the like for grippingly engaging the well bore when in a set position. A retractable packer cup is also disposed on the mandrel. The retractable packer cup is provided for sealing an annulus between the mandrel and the well bore. The retractable packer cup is slidable relative to the mandrel, and can be controlled to slide along the mandrel in order to move the slip to the set position. Also disclosed is a downhole assembly that includes a downhole tool and a setting apparatus. The setting apparatus can be used for lowering the downhole apparatus to a desired setting depth and then releasing the downhole apparatus.

Abstract: A limit collar includes a limit component coupled to a surface of a wellbore tubular; and an interface component engaging the limit component. The interface component may include an extension, and wherein at least one surface of the extension is coupled to the limit component. The extension may also include a side extension.

Abstract: A technique enables anchoring of a tool in a wellbore. The technique provides traction against a well component without creating high stress concentrations that weaken the well component. An anchoring device comprises anchoring members that are selectively movable to an expanded configuration for anchoring the tool. The anchoring members have traction surfaces able to selectively engage a smooth anchoring surface of the well component at any desired location along the well component. Each traction surface is formed to facilitate traction while minimizing stress concentration.

Abstract: A plurality of rows of locking dogs are provided with housing flexibility between rows to allow them to share a shear loading while leaving enough structural integrity in the housing to define the windows through which the dogs emerge. The dogs can also have extensions with a surface that grippingly engages the housing adjacent the window on extension of the dogs such that loads can transfer from the housing into the extension and into the profile in which the dog is disposed rather than passing the shear stress through the window edge into the dog that is in the profile. The dog configuration can also share the load on multiple contact surfaces of the housing to reduce stress at each contact location.

Abstract: A load distributing apparatus including, a sleeve configured to be radially expandable, and a wedge in operable communication with the sleeve. The longitudinal movement of the wedge relative to the sleeve causes an increase in longitudinal load on the sleeve by the wedge until an expanded portion of the sleeve reaches a selected dimension of the wedge after which continued movement of the wedge relative to the sleeve maintains a substantially constant longitudinal load on the sleeve.

Abstract: The present invention provides a system for anchoring an expandable tubular to a borehole wall. The system comprises a support member having a first end fixed relative to the outside of the tubular and a second end comprising a ramping surface. An anchor member has a first end fixed relative to the outside of the tubular and a second end extending toward the support member, said second end being movable relative to the outside of the tubular. Said support member includes a ramp surface that tapers in the direction of said anchor member. Expansion of the portion of the expandable tubular between the first support end and the first anchor end causes the axial device length to shorten, wherein the difference in length is sufficient to cause the second anchor end to move radially outward and engage the borehole wall as a result of engagement with said ramping surface.

Abstract: An actuator for connecting to and displacing of a component in a well tubular is disclosed. The actuator includes a tool shaft provided with a radial direction spring-loaded gripping device which are complementary fitting in the component.