Abstract: A downhole tool is disclosed that functions as an expandable anchoring tool, capable of passing through a restricted wellbore diameter while in a collapsed position and thereafter translating to an expanded position for grippingly engaging a larger wellbore diameter. An embodiment of the tool includes a body including a plurality of angled channels formed into a wall of the body and a plurality of moveable slips. The plurality of moveable slips translates along the plurality of angled channels between a collapsed position and an expanded position. The slips may include a plurality of extensions corresponding to and engaging the plurality of channels.

Abstract: A wellbore casing formed by extruding a tubular liner off of a mandrel. The tubular liner and mandrel are positioned within a new section of a wellbore with the tubular liner in an overlapping relationship with an existing casing. A hardenable fluidic material is injected into the new section of the wellbore below the level of the mandrel and into the annular region between the tubular liner and the new section of the wellbore. The inner and outer regions of the tubular liner are then fluidicly isolated. A non hardenable fluidic material is then injected into a portion of an interior region of the tubular liner to pressurize the portion of the interior region of the tubular liner below the mandrel. The tubular liner is then extruded off of the mandrel.

Abstract: A duplex expansion apparatus for expanding a wellbore tubular to two different diameters from an initial diameter is provided. The duplex expansion apparatus includes: a first diameter expansion cone that is, in a relaxed state, of a diameter less than the internal diameter and in an expanded state of a diameter greater than the internal diameter; a second diameter expansion cone that is, in a relaxed state, of a diameter less than the internal diameter and in an expanded state of a diameter greater than the diameter of the first diameter expansion cone in the expanded state; and an assembly mandrel that is capable of transferring both the first diameter expansion cone and the second diameter expansion cone into their expanded states.

Abstract: An anchor to inhibit rotation of a device relative to an oil well casing, comprising a tubular mandrel adapted for direct or indirect connection to the device; a rotatable cylindrical housing with a plurality of apertures and able to receive at least a portion of the mandrel concentrically therethrough; a plurality of spaced apart anchoring slips disposed between the housing and the mandrel in registry with respective ones of the apertures in the housing's outer surface; a rotation mechanism associated with the mandrel to engage and then move respective ones of the anchoring slips radially towards and then into temporarily anchoring contact with the casing; and one or more drag blocks disposed in the housing in registry with respective ones of the apertures in the housing's outer surface to extend radially outwardly therefrom, each of the drag blocks being normally biased into frictional contact with the casing.

Abstract: An anchor assembly for a downhole tool has upper and lower frictional engagement member for engaging with an inner wall of the casing. The upper frictional members are spring-tensioned, while the lower frictional engagement members slide, to certain degrees, in relation to a longitudinal axis of the anchor assembly. At the same time conical engagement between the lower frictional members and the supporting surface causes the lower frictional members to extend outwardly and engage the inner surface of the casing. As a result, the working tool, for instance a sand cutter secured to the anchor assembly is stabilized in the casing, and an even cut may be performed.

Abstract: A tool is provided for preventing the rotation of a downhole tool or rotary pump stator, the tool comprising a tubular housing and a jaw which is biased radially outwardly from the tool to engage the casing wall for arresting tool rotation and providing significant stabilization of a rotary pump. In doing so, the tool housing moves oppositely to rest against the casing opposite the jaw. The tool housing and the downhole tool are thereby restrained and stabilized by the casing wall. The tool's jaw is released by opposite tool rotation. Preferably, the jaw is biased outwardly from the tool housing to a casing-engaging position by a torsional member, housed along the axis of the hinge of the jaw. The tool is released from the casing by opposite tool rotation which increasingly compresses the jaw toward the housing, twisting the torsional member into torsion, which then acts to urge the jaw outwardly again. Overextension of the jaw during assembly is prevented using cooperating stops in the jaw and the housing.

Abstract: A substantially constant force actuator that is applicable to centralizers, anchors and tractors for use in wells and is applicable to lifting devices such as jacks and load supporting devices. One or more sets of linkage arms are angularly movable by the force of one or more force transmitting members from a minimum angle with the force transmitting members at maximum spacing to a maximum angle with the force transmitting members at minimum spacing to impart a substantially constant force to an object or surface, with the direction of the force being substantially perpendicular to the direction of relative linear movement of the force transmitting members. With the linkage arms at their minimum angles, movement control elements on at least one of the force transmitting members react with guide surfaces of the linkage arms to achieve angular linkage movement and to develop a substantially constant force during angular linkage movement.

Abstract: A method and apparatus to affix a tool downhole in a cased wellbore, one embodiment comprising a tubular body with a slot along its length. A portion of the slot is V-shaped to accommodate a wedge with a corresponding V-shape. The outside of the tubular body has integral teeth. To set the apparatus, the wedge is driven into the V-shaped slot. This movement widens the slot and expands the diameter of the tubular body until it intersects with the casing. The teeth on the outside of the body bite into the casing wall to affix the tool to the casing.

Abstract: A hydraulic liner hanger comprises a tubular body and a plurality of slips disposed radially around the outer surface of the body. In one arrangement, each slip has wickers for engaging the inner surface of a surrounding string of casing. Each slip is connected to a slip ring, the slip ring also being circumferentially disposed around the outer surface of the body. At least some of the slip members are received upon a wedge surface, or cone(s). In operation, an expander tool such as a hydraulic setting tool acts upon the liner hanger, causing the slips to be expanded into frictional engagement with the surrounding string of casing. The operator is then able to slack off the weight of the liner, allowing multiple slips to engage the casing and to suspend the liner therebelow.

Abstract: The present invention generally relates to a method and apparatus for sealing a tubular. In one aspect, the apparatus is sealing apparatus for a downhole tool such as a bridge plug, packer, or frac-plug. In one embodiment, the present invention provides for a sealing apparatus having a body and a sealing system disposed about the body. The sealing apparatus further includes one or more extrusion rings disposed at each end of the sealing system. The sealing apparatus may also have a first cone to support the one or more extrusion rings and a second cone expandable over the first cone. A slip member is disposed adjacent the second cone at each end of the sealing system. Upon actuation, the sealing apparatus expands the sealing system and causes the slip member to fold outward and engage the tubular. The sealing apparatus is functionally expandable to at least 25% diametrically to seal the tubular.

Abstract: A tool is used for installing a string of casing in a well. The casing is supported by a casing hanger that lands on a landing shoulder of the wellhead assembly. A running mechanism is releasably secured to the casing hanger for landing the casing hanger and setting a casing hanger seal. A profile is formed in the wellhead assembly above the landing shoulder. The tool includes a body having an upper portion and a lower portion, the lower portion being secured to the running mechanism. A mandrel is mounted to the body for axial movement relative to the body, the mandrel having a threaded upper end for securing to a running string of conduit. A cam surface is formed on the mandrel. A plurality of dogs are mounted to the upper portion of the body in sliding engagement with the cam surface for movement in response to axial movement of the mandrel into engagement with the profile. While in the engaged position, the dogs resist upward movement of the casing hanger during cementing of the string of casing.

Abstract: A sealing device is provided for making a seal against an annular surface. The device includes at least one flexible seal ring having a relaxed position in which the seal ring is out of contact with the surface and an active position in which the seal ring is in sealing contact with the surface, an operating member movable relative to the seal ring in a direction substantially parallel to the annular surface to produce a substantially radial movement of the ring into the active position, and a plurality of elongate, substantially parallel shape-memory material actuators arranged around the annular surface. A change of shape of the actuators produces the movement of the operating member which moves the seal ring into the active position.

Abstract: A downhole tool is disclosed that functions as an expandable anchoring tool, capable of passing through a restricted wellbore diameter while in a collapsed position and thereafter translating to an expanded position for grippingly engaging a larger wellbore diameter. An embodiment of the tool includes a body including a plurality of angled channels formed into a wall of the body and a plurality of moveable slips. The plurality of moveable slips translates along the plurality of angled channels between a collapsed position and an expanded position. The slips may include includes a plurality of extensions corresponding to and engaging the plurality of channels.

Abstract: An apparatus for handling tubular goods which includes an elongate body having a coupling end adapted for mating engagement with a tubular good. The coupling end includes a structural member, a flexible cylindrical cage and a pressure member. Longitudinal strips joined at their opposed ends form the cage coaxial with and connected to the structural member of the body. The coaxial pressure member is disposed in an annulus between the structural member and the cage. The pressure member is adapted to cause radial displacement of the cage, thereby exerting a gripping force to maintain the mating engagement between the tubular good and the coupling end enabling a transfer of force between the body and the tubular good.

Abstract: An apparatus suspends a pipe from the lower end of a tubular body positioned concentrically within an outer casing. Pockets are formed about the outer circumference of the body, each to receive a cone having an inner conical side adjacent the inner wall of each pocket, and a slip having an inner conical side adjacent an outer conical side of the cone. Slots are formed in side walls of the pocket for guiding the slip an securing the slip and cone with respect to the body.

Abstract: A gripping tool 10 may be positioned in a well on a running string RS to at least temporarily secure the gripping tool to a borehole wall. The gripping tool includes a drag member 72, a plurality of slips 40, 48, and a cone member 30, 46. A slip setting mechanism 88 is provided for securing the slips in the radially inward position when the slip setting mechanism is run-in the well. At least one ramp moves the slip setting mechanism to a released position upon rotation of the running string in a first direction. A ratchet member rotationally releases the running string from the slip setting mechanism when the running string is rotated in an opposing direction. The tool may be set, released by pickup and returned to the run-in position, then reset without returning the tool to the surface.

Abstract: A self-lubricating swage expands tubulars and includes a primary swaging tool supported on a mandrel that has a lubricious capacity or a primary swaging tool supported on a mandrel and a nose swage member supported on an end of the mandrel. In the latter the nose swage member is fabricated of, is coated with or otherwise includes and applies a lubricious material that smears onto a surface coming into contact with the nose swage member. The smearing of the lubricious material facilitates the sliding of the swaging member as it contacts the inner walls of the tubular.

Abstract: An apparatus for radially expanding a tubular member.

Abstract: A tool is provided for preventing the rotation of a downhole tool or rotary pump stator, the tool comprising a tubular housing and a jaw which is biased radially outwardly from the tool to engage the casing wall for arresting tool rotation and providing significant stabilization of a rotary pump. In doing so, the tool housing moves oppositely to rest against the casing opposite the jaw. The tool housing and the downhole tool are thereby restrained and stabilized by the casing wall. The tool's jaw is released by opposite tool rotation. Preferably, the jaw is biased outwardly from the tool housing to a casing-engaging position by a torsional member, housed along the axis of the hinge of the jaw. The tool is released from the casing by opposite tool rotation which increasingly compresses the jaw toward the housing, twisting the torsional member into torsion, which then acts to urge the jaw outwardly again.

Abstract: There is disclosed a system in which a liner is lowered into and landed within an outer casing. The casing includes a casing joint having upwardly facing landing shoulders formed about its bore, and the liner has a recess thereabout which receives a “C” shaped hanger carried in a retracted position as it is lowered into the bore. The hanger has teeth about it which are arranged to seat upon the landing shoulders when the hanger is released to expand against the bore so that its teeth may be lowered onto the landing surface.

Abstract: A linkage apparatus for selectively gripping and releasing the inside walls of a conduit, the apparatus comprising: a first arm; a bi-directional gripping cam rotatably attached to the arm; and an extension and locking device adapted to selectively radially extend the arm from a tool housing to an inside wall of a conduit and adapted to selectively lock the arm in an extended position.

Abstract: A wellbore casing formed by extruding a tubular liner off of a mandrel. The tubular liner and mandrel are positioned within a new section of a wellbore with the tubular liner in an overlapping relationship with an existing casing. A hardenable fluidic material is injected into the new section of the wellbore below the level of the mandrel and into the annular region between the tubular liner and the new section of the wellbore. The inner and outer regions of the tubular liner are then fluidicly isolated. A non hardenable fluidic material is then injected into a portion of an interior region of the tubular liner to pressurize the portion of the interior region of the tubular liner below the mandrel. The tubular liner is then extruded off of the mandrel.

Abstract: A high temperature, high pressure retrievable packer adapted for service under extreme operating conditions when the packer apparatus is held in the wellbore with a mechanical slip and a barrel slip. The barrel slip has a barrel slip body with a plurality of openings defined in the outer surface of the body. Cylindrical inserts are received in the openings. The cylindrical inserts define upward facing and downward facing gripping edges that will engage casing when the barrel slip body is radially expanded. The inserts are preferably tungsten carbide inserts. A sufficient number of inserts are included along the length and around the circumference of the barrel slip so that the barrel slip can get a good grip in the casing wall. Separate metals may be used for the barrel slip body and the inserts so that a higher yield strength alloy steel may be utilized than is possible with other barrel slip arrangements.

Abstract: A swedge assembly is disclosed which has the capability of allowing for a sealing connection between an inner tubular and an outer tubular where the outer tubular has significant out of roundness. A resilient segment or segments is disposed on the swedge in contact with the inner tubular to be expanded so as to fill any voids created by out of roundness of the outer tubular. The resilient material may be an elastomer or any pliable metallic or any other material compatible with the applicable well bore conditions.

Abstract: A stacking arrangement for wellhead tubular members wherein the adjoining ends of the tubular members are specially shaped to prevent or limit outward radial deflection and the damage associated therewith. A casing hanger is provided with an upper longitudinal end having an inwardly sloped inner bearing surface and an inwardly sloped outer bearing surface. An outwardly sloped engagement surface adjoins the two bearing surfaces and is designed to be captured radially within a complimentary shaped surface on a running tool or other engaging member landed atop the casing hanger. A grooved section is provided to assist removal of trash from the upper end of the casing hanger.

Abstract: A whipstock assembly 10, 110 for setting within a casing C includes a whipstock body 12, 112 having a whipstock diversion face 24, 124 for diverting a tool with respect to the casing. At least one wedge member 32, 132, 133 is moveable relative to the whipstock body and supports one or more wedge slips, 34, 36, 134, 136 thereon for anchored engagement with the casing. The wedge member has a whipstock body engaging surface 98 for sliding engagement with a lower wedge engaging surface 96 on the whipstock body. An elongate rod or other actuation member 40 moves the at least one wedge member from the run in position to the set position. According to the method of the invention, the whipstock and anchor assembly may be run into the well through a tubing string then set in the casing. The whipstock assembly may be of the type which is retrievable to the surface after having been set in the casing.

Abstract: A downhole anchor for preventing rotational movement of a member within a well has a central tubular member, a slip housing and a drag assembly disposed about the tubular member. The slip housing carries at least two slip members, each slip member being mounted in a slot for slide-in positioning. This slip mounting feature facilitates assembly and refurbishment of the anchor. The slips are inwardly biased toward the tubular member by a spring acting between the slip members and the tubular member. The positioning of the spring in this way also facilitates assembly and refurbishment of the anchor and reduces stress damage to the slip housing.

Abstract: A downhole pulling tool (100) for retrieving downhole devices (102, 104) from a wellbore is disclosed. The downhole pulling tool (100) includes a mandrel (106) and a sleeve (108) that is slidably disposed about the mandrel (106). The sleeve (108) is moveable in a first direction from a first position to a second position relative to the mandrel (106) and is moveable in a second direction from the second position to a third position relative to the mandrel (106). An engagement member (114) radially extends between the mandrel (106) and the sleeve (108) and is operated from a retracted position to an engagement position when the sleeve (108) is moved to the second position relative to the mandrel (106) after equalization.

Abstract: The present invention is a surge anchor mechanism which includes a main body, lower unit slidable in relation to the main body, and slip members. The slip members have at least one inclined end surface. The lower unit has an inclined surface forming a frustoconical shape wherein the slope of the surface complements the inclined end surface of the slip member. The lower unit is aligned along the axis of the main body and movable in relation to the main body along this axis. The slip members are biased towards the lower unit and movable transversely in relation to the axis of the lower unit. As a surge occurs in the well, the lower unit and the main body are forced towards each other. This causes the inclined surface of the lower unit to cooperate with and move along the corresponding inclined surface of the slip member forcing the slip member outward from the lower unit and into engagement with the well casing.

Abstract: An improved cage slip system is disclosed. The cage is constructed so that the cones which actuate the slips extend into the cage openings. The radial extension of the slips is limited so as to retain them if they are extended in an unsupported situation. The cones have a maximum outside dimension equal to the outside dimension of the cage so as to increase the rating of the slips by increasing the bearing area of the cones on the slips. The beneficial features of the cage design are retained while a greater degree of radial expansion of the slips is possible allowing minimization of tool inventory for situations where a lighter wall casing requires further slip extension.

Abstract: A mandrel-operated torque roller anchor for insertion into the casing of a well, which when set resists axial movement and prevents rotation of itself and the string above it in one direction, but permits such motion when rotated in the other direction. The anchor comprises a central mandrel and a slip cage. The slip cage has a number of elongated slots. A number of drag slips rest on the mandrel within the slip cage and provide limited outward movement, through the slots, to bear against the casing. Each drag slip has a surface with wickers to grip the casing and set the anchor, and an adjacent unwickered drag portion to bear against the casing to allow the mandrel to rotate relative to the slips and cage, but permit axial movement of the string. Slots running through the drag portion of the slip provide flow around the anchor. Biasing elements extend between the mandrel and an interior surface of each slip to force the drag portion of the corresponding slip against the casing when in an unset position.

Abstract: A high expansion slip system for anchoring a tool to a downhole wellbore surface. A slip is initially retained within the interior volume of a tool body for installation downhole in the wellbore. The slip has an inclined surface which moves the slip radially outwardly when the slip is move axially along a longitudinal axis through the tool body. Two opposing slips can be operated to center the tool body within the wellbore, and the setting of the two slips can be synchronized to control the tool body position and setting force on each slip. After the slips have been moved from the interior space to engage the wellbore surface, the hollow interior space within the tool body is unobstructed to open an unobstructed flow path for passage of fluids or well tools.

Abstract: A liner hanger will actuate remotely in a well to support a liner in casing. A running tool is secured to drill pipe and attached to the upper end of the liner. The liner hanger mounts to the exterior of the liner and includes a pair of tapered wedge members mounted in opposition to each other. The lower wedge member is stationarily secured to the liner for movement with it. The upper wedge member is carried in an extended running-in position by a retainer. A stop member is mounted above the lower wedge member by a connector. The connector secures the stop member to the liner for movement with it while running-in. Once on bottom, the stop member is released from the connector by stroking the drill pipe. Continued upward movement of the drill pipe will be relative to the stop member because it will engage the casing to remain stationery with the casing. The wedge members will move upward, with the upper wedge member contacting the stop member and being prevented from further upward movement.

Abstract: A tubing tightener which is readily adaptable to either clockwise or anti-clockwise rotational setting operation and which uses a series of drag slips having integral drag and slip surface regions. The drag surface regions are substantially smooth and are advanced into contact with a wellbore with the slip surface regions retracted, when the tightener is in its unlocked orientation. The slip surface regions are serrated to provide a positive engagement with the wellbore and are advanced into engagement with the wellbore with the drag surface regions retracted, when the tightener is in its locked orientation. The drag slips are caused to rock about a point of contact between the drag slip surfaces and the wellbore, located intermediate the drag and slip surface regions, in order to advance the appropriate surface region of each drag slip into engagement with the wellbore. The invention provides for a compact, lightweight construction with improved reliability and increased bypass around the tightener.

Abstract: A torque anchor for the purpose of anchoring well equipment within a well conduit. The device anchors the well equipment from rotation in one direction but allows rotation in the other. The device has a body with slips and a driving portion within the slip. The slip has a friction surface which slides against the well conduit. This prevents damage to the gripping teeth or the well conduit. The slip has a gripping teeth portion which engages the well conduit only when the anchor is set. The slip is urged outward by the use of a spring. A portion of the slip is the drive surface which engages the driving portion. This drive surface is such that the perpendicular distance from the drive surface to the outer edge of the gripping teeth increases along the slip in the direction away from the friction surface. The slip has a portion which retains the slip within the anchor and thereby does not require any retaining means.

Abstract: A tubing tightener which is readily adaptable to either clockwise or anti-clockwise rotational setting operation and which uses a series of drag slips having integral drag and slip surface regions. The drag surface regions are substantially smooth and are advanced into contact with a wellbore with the slip surface regions retracted, when the tightener is in its unlocked orientation. The slip surface regions are serrated to provide a positive engagement with the wellbore and are advanced into engagement with the wellbore with the drag surface regions retracted, when the tightener is in its locked orientation. The drag slips are caused to rock about a point of contact between the drag slip surfaces and the wellbore, located intermediate the drag and slip surface regions, in order to advance the appropriate surface region of each drag slip into engagement with the wellbore. The invention provides for a compact, lightweight construction with improved reliability and increased bypass around the tightener.

Abstract: There is disclosed a running tool for running and setting and then releasing from a well packer of the type having a main body and a setting sleeve vertically shiftable on the main body to set the packer. The setting tool includes a mandrel carrying a latch having left-hand threads for engaging left-hand threads on the body of the packer as well as teeth adapted to engage in notches in the upper end of the packer body to prevent right-hand rotation of the setting tool with respect to the packer as the packer is run on the setting tool into the well bore. When the packer is at the desired level, fluid pressure in the setting tool lowers the setting sleeve to set the packer and releases the setting tool from connection to the packer so that it may be retrieved.

Abstract: A method and a tool for use in commencing the drilling of a deviated well from a gap in the casing of a cased wellbore using a non-rotary drill string while maintaining the desired orientation of the drill bit by minimizing the effects of reactive torque and axial loading on the drill string. The tool comprises a drill bit, a downhole motor, a tubular member connected between the downhole motor and the drill string, and an anchor assembly slidably mounted on the tubular member which is actuated by the tubular member to engage the casing during drilling of the well. The tubular member includes a setting section for actuating the anchor assembly, a freewheel section to facilitate orientation of the drill bit prior to drilling, and a working section for maintaining the orientation of the drill bit during drilling.

Abstract: A hanger (3) is suspended and sealed within a wellhead housing (5) by means of a landing ring which engages teeth (8) on the hanger, and a sealing device consisting of wedge rings (15 and 16) which seal respectively against the teeth (8) and the wall of the housing (5).

Abstract: A cased wellbore extends downhole to a pay zone which is produced by a rod actuated downhole pump that lifts fluid from the bottom of the wellbore up through a tubing string to a wellhead. The pump is seated in a pump cavity, and the tubing string is tensioned and is rotated. The upper end of the tubing string is attached to a fluid conveying swivel and a tubing rotator. A combination tubing anchor having a fluid conveying rotatable mandrel is attached adjacent to and forms part of the lower end of the tubing string by which the lower end of the tubing string is rotatably and releasably affixed to the casing in proximity to the lower end of the wellbore. A plurality of radially active slips are actuated in response to manipulation of the tubing string to extend the slips into engagement with the casing wall and to retract the slips in order to remove the tubing string from the borehole.

Abstract: A well packer for engaging and sealing against the inside of a conduit having a mandrel, friction blocks, slips, and a packer seal. The friction blocks are supported by the mandrel and positioned parallel to the slips providing a short inexpensive packer. The packer can be quickly and easily converted to be either a mechanical set bi-directional packer, a compression set well packer, or a tension set packer.

Abstract: A rotation release apparatus is provided for use in a wellbore tool to selectively couple a first wellbore tool member to a second wellbore tool member until the wellbore tool is lowered to a selected depth within the wellbore. The rotation release apparatus includes a coupling member secured to the first wellbore tool member, and a latch member secured to the second wellbore member. A cam member is secured to the coupling member to release the latch member from the coupling member when the wellbore tool is rotated about a longitudinal axis. The rotation release latching apparatus may be operated to couple the latch member to the coupling member by axial movement of the wellbore tool along a longitudinal axis.

Abstract: An apparatus is established which facilitates the cutting and removal of well casing on a single trip into the wellbore. The apparatus is run into the wellbore on the tubing string and provides a rotatable sleeve including grapples adapted to engage the casing, and to facilitate removal of the casing. The apparatus also includes cutting assemblies coupled to the mandrel, which may be rotated so as to cut the casing, thereby facilitating removal of the casing through use of the grapples.

Abstract: The present invention is a wellbore tool which includes as a component an actuator which is composed at least in-part of a shape-memory material characterized by having a property of switching between a deformed shape and a pre-deformed shape upon receipt of thermal energy of a preselected amount. The wellbore tool further includes a component which is movable in position relative to a wellbore tubular conduit into a selected one of a plurality of configurations. The plurality of configurations include a first configuration with the first component in a first position relative to the wellbore tubular conduit, and corresponding to a first mode of operation of the wellbore tool. The plurality of configurations also includes a second configuration with the first component in a second position relative to the wellbore tubular conduit, and corresponding to a second mode of operation in the wellbore tool.

Abstract: A wedge lock ring apparatus includes an outer housing having a housing bore with a housing groove defined therein. The housing groove has at least one and preferably has upper and lower housing groove tapered sides. An inner sleeve has a cylindrical outer surface with a sleeve groove defined therein, and the sleeve groove has at least one and preferably has upper and lower sleeve groove tapered sides. A wedge lock ring is received in the housing groove and the sleeve groove and has ring tapered edges complementary to the housing groove tapered sides and sleeve groove tapered sides, such that the sleeve and housing are locked against relative rotation by wedged engagement with the lock ring.

Abstract: A releasable boring mechanism for releasably securing a tool downhole in a well includes upper and lower sets of slip expandable radially outward from retracted positions into extended positions for engagement with the inside wall of a well casing when a mandrel attached to a tubing string casing, the anchoring mechanism is lifted to wedge upper and lower frustoconical heads between the mandrel and the slips. In releasing the slips from the well casing, the lower edge of a window in an upper slip cage first engages a primary release shoulder on the bottom of a first to release one of the slips to lift such slip through the application of compression forces from the casing well.

Abstract: A cased wellbore extends downhole to a pay zone which is produced by a rod actuated downhole pump that lifts fluid from the bottom of the wellbore up through a tubing string to a wellhead. The pump is seated in a pump cavity. The tubing string is tensioned and is rotated. The upper end of the tubing string is attached to a fluid conveying swivel means and a tubing rotator. A combination tubing anchor and fluid conveying swivel is attached adjacent the lower end of the tubing string by which the lower end of the tubing string is rotatably and releasably affixed to the casing in proximity to the lower end of the wellbore. The lower swivel is located adjacent the anchor and enables the tubing string to rotate respective to the anchor while conveying fluid through the rotating tensioned production tubing string.

Abstract: A well packer for sealing an annular space within a well bore around a tubing string including a tubular mandrel, an expandable seal assembly on the mandrel for sealing around the mandrel with a well bore wall, a slip assembly on the mandrel for releasably locking the packer with the well bore wall, a drag spring and slip carrier assembly around the slip assembly, and an interlock assembly for selectively coupling the drag spring and slip carrier assembly with the mandrel for operating the packer through running, set, and release modes. The interlock assembly includes running segments movable a limited distance on the mandrel to prevent jamming of the packer parts in response to mandrel rotation in a non-setting direction. The interlock assembly also includes locking segments having structure to fully seat the segments on the mandrel under load and to minimize packer element compression loss during setting.

Abstract: A setting tool for a liner hanger in an oil well completion system wherein the setting tool mechanism incorporates structure for manipulating a liner prior to and subsequent to hanging the liner hanger in a well casing. Prior to setting the liner hanger the setting tool is locked to a liner hanger by an interconnection with a clutch housing. After hanging the liner hanger, rotation of the setting tool mandrel uncouples the coupling nut from the liner hanger to release the setting tool from the liner hanger and further rotation of the setting tool moves a lock nut to a position when the coupling nut locks the clutch housing to the setting tool so that the liner hanger can be rotated after it is hung in a well casing. The liner hanger and the clutch housing have interengageable clutch surfaces.

Abstract: A setting tool for a liner hanger in an oil well completion system wherein the setting tool mechanism incorporates the necessary structure for manipulating a liner prior to and subsequent to hanging the liner hanger in a well casing. Prior to setting the liner hanger the setting tool is keyed to a liner hanger by longitudinal dogs in longitudinal grooves. After hanging the liner hanger, the dogs are released and rotation of the setting tool mandrel uncouples a coupling nut from the liner hanger to release the setting tool from the liner hanger and further rotation locks the setting tool mandrel to the clutch housing with a lock nut so that the liner hanger can be rotated after it is hung in a well casing.