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| Number | Title | Issue Date |
| 7624797 | Downhole tool operated by shape memory material The invention features the use of a shape memory material in a downhole application to provide an energy source for at least in part setting the tool. In a specific application the springs that set slips for a liner hanger are made from the shape memory material and... | 12/01/2009 |
| 7121350 | Torque anchor 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 th... | 10/17/2006 |
| 7082991 | Slip spring with heel notch In order to prevent premature separation of the slip and slip spring and to simplify production of the slip casing, a self-centering spring engageable with a packer tool slip is modified according to the present invention. A groove located at a lower center of the s... | 08/01/2006 |
| 7028770 | Tubular expansion apparatus and method Tools for expanding downhole tubulars into each other or in open hole are disclosed. One embodiment uses a movable cone biased by Bellville washers to move longitudinally against such bias and allow collets to move radially in or out to a predetermined maximum diame... | 04/18/2006 |
| 6920927 | Method and apparatus for anchoring downhole tools in a wellbore A wellbore anchoring device for anchoring a down-hole tool within a string of casing is provided, comprising an expandable cone having at least one annular integral shoulder, defining the large end of at least one conical annular recess on an outer surface of the co... | 07/26/2005 |
| 6880642 | Well abandonment plug A method and apparatus of plugging and abandoning a well includes using a plug apparatus and installing bentonite elements in an oil well production casing having a bore. The plug apparatus is lowered into the production casing bore to a selected elevation using a s... | 04/19/2005 |
| 6702014 | Deflector tool for deflecting items through a window in borehole casing A well bore deflector tool which is used primarily for deflecting tools, lining and the like through a window which has been milled in the side of a well bore casing includes a deflector face (3) at an upper end thereof and slips (9, 10) for selectively g... | 03/09/2004 |
| 6241018 | Hydraulic running tool The present invention generally provides a running tool which can be released using hydraulic pressure and can provide continued rotation to a liner hanger or other tool disposed below and rotationally connected to the running tool. In one aspect, a hydra... | 06/05/2001 |
| 6152233 | Surge anchor assembly 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 fru... | 11/28/2000 |
| 6152219 | Downhole pulling tool 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 movea... | 11/28/2000 |
| 5829531 | Mechanical set anchor with slips pocket A mechanical set anchor wherein a plunger extending from a base end of an anchor body activates a pin type trigger which releases a spring utilized to set multiple slips extending from the body of the anchor. Continued downward compressive forces fully se... | 11/03/1998 |
| 5538082 | Downhole running system & method for setting a downhole tool in a bore A downhole running system for use in setting a downhole tool in a bore includes a running tool comprising: radially extending members for holding the tool at a desired location in a bore and being selectively configurable, in a first configuration, to per... | 07/23/1996 |
| 5488989 | Whipstock orientation method and system A deflecting tool or whipstock is oriented and anchored in a well casing during a single trip of a running string so that a window can be formed in the wall of the casing at a selected azimuth. The angular orientation of the deflecting tool is measured, a... | 02/06/1996 |
| 5348090 | Expanded slip well anchor A well anchor having a body with a mandrel movably extending therethrough with first and second slips connected to the mandrel. Each of the slips includes a wedge surface and the wedge surfaces engage each other whereby movement of the first and second sl... | 09/20/1994 |
| 5275239 | Anchoring device for tubing string A device anchors a tubing string within a stationary well casing against rotation in a predetermined angular direction. A housing is installed in-line in the tubing string. Anchoring mechanisms are spaced circumferentially about the housing. Each anchorin... | 01/04/1994 |
| 5240076 | Casing tension retainer A wellhead housing a supports a string of casing in tension by using a load ring. The load ring mounts to the exterior of a casing hanger which secures to the upper end of the string of casing. The load ring is split, resilient and outwardly biased. The l... | 08/31/1993 |
| 5002131 | Casing tensioning mechanism for a casing hanger A mechanism mounts to a casing hanger for supporting the casing in tension. The mechanism includes a plurality of dogs mounted around the exterior of the casing hanger. Each of the dogs has wickers on its exterior which engage wickers formed in the bore o... | 03/26/1991 |
| 4765402 | Self-locating seal assembly A self-locating seal assembly is shown for sealing between a well string and the bore of a surrounding well conduit, the surrounding conduit being provided with an internal recess for engagement by the seal assembly. A mandrel has an internal bore, an ext... | 08/23/1988 |
| 4715755 | Securing device for securing in cavities A securing device for securing in cavaties and comprising a number of clamping jaws (11), provided under influence of a changeable tension body (21) to expand against opposite wall portions (13) in said cavity. The clamping jaws (11) have engagement surfa... | 12/29/1987 |
| 4712615 | Liner hanger assembly with setting tool A setting tool and liner hanger where the liner hanger has a threaded release section and elongated slip slots for receiving slips. The slips have inclined tongue and groove interconnections along the sides of the slots defining expander surfaces. The set... | 12/15/1987 |
| 4640354 | Method for actuating a tool in a well at a given depth and tool allowing the method to be implemented A downhole tool is actuated at chosen well depth by selection of a control element that melts at the chosen depth well temperature. In one form of tool, a fusible pin melts to release spring-loaded jaws which move against an expansion cone to anchor the t... | 02/03/1987 |
| 4497367 | Liner hanger A liner hanger having an elongate vertical body with a central flow passage means at its lower end engaged with a depending liner, releasable coupling means at its upper end releasably engaging a setting tool on a string of setting pipe. The body has a pl... | 02/05/1985 |
| 4349071 | Cement retainer and setting tool assembly A well tool assembly comprising a drillable cement retainer and setting tool includes a connection between a setting-tool mandrel and a retainer mandrel allowing for opening and closing of a cement valve in the retainer without disconnecting the setting t... | 09/14/1982 |
| 4340116 | Slip deployment mechanism A slip deployment mechanism for use in conjunction with a packer in a tubing string includes a cylindrical retainer telescoped over the upper ends of a plurality of slip segments and interfitting means on the segments and a mandrel coact with the retainer... | 07/20/1982 |
| 4287949 | Setting tools and liner hanger assembly A liner hanger and setting tool for use in oil well completions employing a liner hanger having a one piece body member and spring biased slips and a setting tool having a hydraulically actuated slip release mechanism normally retaining the slips in a ret... | 09/08/1981 |
| 4273372 | Apparatus for use in lowering casing strings An apparatus for use in lowering casing strings or other parts from a floating unit to a subsea well which includes an expansion-type casing running tool employing extendible latches that have left-handed threads cut on their exterior for engagement with ... | 06/16/1981 |
| 4043390 | Anchoring device and running tool for downhole apparatus In accordance with an illustrative embodiment of the present invention, there is disclosed herein a device for anchoring downhole apparatus such as a safety valve in a tubing landing nipple, and a running tool for lowering the anchoring device at the end ... | 08/23/1977 |
