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| Number | Title | Issue Date |
| 7854258 | Self-anchoring device with force amplification A downhole tool is provided that includes a grip assembly for contacting a well formation. The grip assembly includes a gripper body; and a centralizer that is attached to and radially expandable with respect to the gripper body and that has a geometry which is lock... | 12/21/2010 |
| 7828052 | Downhole force generator A well tool for applying a pulling or a pushing force to an object in an interior of a well bore comprising: a) an inner member comprising a first elongated member, a second elongated member and an actuation means axially interconnecting the first elongated member a... | 11/09/2010 |
| 7617867 | Overshot tool An overshot tool includes a grapple, a torque sub rotationally fixed to the grapple and a deformable member in operable communication with the torque sub. The torque sub is responsive to torsional movement thereof. A method for retrieving a fish with the tool is als... | 11/17/2009 |
| 7559361 | Downhole force generator A well tool for applying a pulling or a pushing force to an object in an interior of a well bore comprising: a) a inner member comprising an first elongated member, a second elongated member and an actuation means axially interconnecting the first elongated member a... | 07/14/2009 |
| 7357183 | Magnetic fishing tool and method An apparatus and method for retrieving metal objects. The apparatus includes a housing with an inner part, with the housing having a first wall. The apparatus further includes a sleeve disposed within the housing, with the sleeve being constructed of a non-magnetic ... | 04/15/2008 |
| 7350587 | Pipe guide A guide is disclosed for facilitating the movement of tubulars in well operations. In one aspect, the guide is a pipe guide with a base, an upper extension apparatus, a lower extension apparatus with a first end pivotably secured to the upper extension apparatus and... | 04/01/2008 |
| 7325614 | Method for releasing stuck drill string A method for releasing a drill string stuck against a wall of a well bore due to pressure differential between the hydrostatic pressure of a fluid in the well bore and the pressure of a formation at the point where the drill string is stuck. The method includes inje... | 02/05/2008 |
| 7267168 | Spider with discrete die supports The spider, arranged for support on a drilling rig, is fitted with a plurality of slips peripherally distributed about a slip bowl. Each slip has a plurality of pipe gripping dies distributed vertically and resting on individual abutment surfaces on the slip. Each s... | 09/11/2007 |
| 7225879 | Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell An assembly and methods for constructing a MONOWELL includes a monodiameter casing disposed in a monodiameter wellbore having diametric efficiency with a monobore production delivery system disposed within the monodiameter casing. An assembly for constructing a mono... | 06/05/2007 |
| 7207390 | Method and system for lining multilateral wells In accordance with one embodiment of the present invention, a method for lining a lateral wellbore includes drilling a main wellbore extending from a surface to a subterranean zone, casing the main wellbore with a main casing having a plurality of lateral wellbore w... | 04/24/2007 |
| 7207395 | Method and system for testing a partially formed hydrocarbon well for evaluation and well planning refinement A method and system for testing a partially formed well includes forming a first well bore intersecting a subterranean formation. The first well bore includes a portion of a planned well having a first configuration. A production characteristic of the subterranean f... | 04/24/2007 |
| 7188672 | Well string assembly A well string assembly includes an upper tubular well string part having upper and lower ends between which there is formed a passageway, a lower well string part having upper and lower ends, which lower end is spaced apart from the lower end of the upper well strin... | 03/13/2007 |
| 7187620 | Method and apparatus for borehole sensing The present invention provides an apparatus and method for sensing subsurface data. One embodiment of the invention comprises a shuttle attached to a conveyance where the conveyance and shuttle are adapted to be spooled downhole into a borehole for sensing seismic d... | 03/06/2007 |
| 7184076 | Fluid-powered inspection camera A fluid-powered inspection camera adapted to be operated in a contaminated environment where an electric power supply is not readily available includes a housing having a tubular shell terminating at an open end. An imaging device has a portion arranged within the t... | 02/27/2007 |
| 7172028 | Reciprocating slickline pump A reciprocating hydraulic slickline pump for use in a wellbore. The pump comprises a pump member. The pump member is reciprocated axially by slickline in order to form an upstroke and downstroke. The pump is configured such that it pressurizes fluid within a workstr... | 02/06/2007 |
| 7163063 | Method and system for extraction of resources from a subterranean well bore A method for stimulating production of resources from a coal seam includes forming a drainage well bore in the coal bed that has a first end coupled to a ground surface and a second end in the coal seam. The method further includes inserting a liner into the well bo... | 01/16/2007 |
| 7163059 | Method for releasing stuck drill string A method for releasing a drill string stuck against a wall of a well bore due to pressure differential between the hydrostatic pressure of a fluid in the well bore and the pressure of a formation at the point where the drill string is stuck. The method includes inje... | 01/16/2007 |
| 7152674 | Disconnect devices A disconnect device for use as part of a tubing string downhole in an oil or gas well and which comprises a tubular body, at least one slip held within the tubular body, and a sleeve housed within the tubular body to hold the at least one slip in coupling engagement... | 12/26/2006 |
| 7137454 | Apparatus for facilitating the connection of tubulars using a top drive A method and apparatus for facilitating the connection of tubulars using a top drive which, in one aspect, the apparatus includes a body connectable to said top drive. The body includes at least one gripping element radially displaceable by hydraulic or pneumatic fl... | 11/21/2006 |
| 7134494 | Method and system for recirculating fluid in a well system A method for recirculating fluid in a well system includes drilling a first well bore from a surface to a subterranean zone, and drilling an articulated well bore that is horizontally offset from the first well bore at the surface and that intersects the first well ... | 11/14/2006 |
| 7100687 | Multi-purpose well bores and method for accessing a subterranean zone from the surface A well system includes at least two well bores extending from a surface to a subterranean zone. Each of the two well bores is used to form a well bore pattern for the subterranean zone that intersects the other well bore and transports fluid from the subterranean zo... | 09/05/2006 |
| 7100697 | Method and apparatus for reforming tubular connections The present invention generally relates to methods and apparatus for connecting tubulars and reforming the connection between the tubulars. In one aspect of the invention, the tubulars are aligned, connected, and then reformed at the connection. In one embodiment, t... | 09/05/2006 |
| 7096952 | Latch mechanism guide An apparatus and method for guiding a fish into engagement with a latch mechanism on a fishing tool, by expanding the ends of a set of fingers into contact with a bore hole. The ends of the fingers surround the fish and guide the fish and the latch mechanism togethe... | 08/29/2006 |
| 7096951 | Method and apparatus for retrieving an object from a well bore A fishing tool apparatus for retrieving an object from within a well bore, wherein the object has an opening for receiving the apparatus, comprises a support rod, an expandable sleeve, and a biasing means. The expandable sleeve may be externally threaded for engagin... | 08/29/2006 |
| 7083209 | Hydraulic overshot tool without a nozzle, and method of retrieving a cylinder The present invention provides an improved hydraulic overshot tool. The overshot tool mechanically engages a cylindrical body downhole attempting to be retrieved. In the event retrieval is unsuccessful, the overshot tool may be hydraulically released from the cylind... | 08/01/2006 |
| 7077205 | Method and device to free stuck objects A method of freeing stuck objects (16) from a bore (14) comprises running a string (12) into the bore (14), the string (12) including a flow modifier, such as a valve, for producing variations in the flow of fluid through the strin... | 07/18/2006 |
| 7077204 | Whip retrieval method and apparatus The retrieval tool includes a cylindrical member having a body, an inner passage, a guide cylinder and an engaging member. The engaging member may slide within the cylindrical member in order to frictionally engage a whipstock against an inner surface of the guide c... | 07/18/2006 |
| 7073595 | Method and system for controlling pressure in a dual well system A method for controlling pressure of a dual well system includes drilling a substantially vertical well bore from a surface to a subterranean zone and drilling an articulated well bore from the surface to the subterranean zone using a drill string. The articulated w... | 07/11/2006 |
| 7066284 | Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell An assembly and methods for constructing a MONOWELL includes a monodiameter casing disposed in a monodiameter wellbore having diametric efficiency with a monobore production delivery system disposed within the monodiameter casing. An assembly for constructing a mono... | 06/27/2006 |
| 7055596 | Packer releasing methods Methods of releasing a well tool set in a wellbore are provided. In various embodiments, a well tool, such as a packer, is released from sealing and gripping engagement within a wellbore using alternate methods. A dual-string packer is described in which the packer ... | 06/06/2006 |
| 7051810 | Downhole force generator and method for use of same A downhole force generator (60) adapted to be moved to a target location within a wellbore (70) for interaction with a well tool (74) previously positioned in the wellbore (70) comprises a downhole power unit (62) having a moveable... | 05/30/2006 |
| 7036595 | Removal of tubulars from wells Slips slidably disposed on a mandrel for lowering into a well inside a tubular to be removed from the well move outwardly to engage the tubular upon withdrawing the mandrel carrying the slips from the well. In one implementation there is a conical surface such that ... | 05/02/2006 |
| 7025137 | Three-dimensional well system for accessing subterranean zones A drainage system for accessing multiple subterranean zones from the surface includes an entry well extending from the surface. The system also includes two or more exterior drainage wells extending from the entry well through the subterranean zones. The exterior dr... | 04/11/2006 |
| 7025154 | Method and system for circulating fluid in a well system A method for circulating drilling fluid in a well system includes drilling a substantially vertical well bore from a surface to a subterranean zone and drilling an articulated well bore from the surface to the subterranean zone. The articulated well bore is horizont... | 04/11/2006 |
| 7021382 | Downhole axial force generating tool An axial force generating tool for applying a force on a structure positioned within a borehole is taught. The tool includes a housing (19) sized to fit within the borehole in which the tool is required to act; an outer seal (38) disposed about the hou... | 04/04/2006 |
| 6988551 | Jar with adjustable trigger load A jar provided with an adjustable triggering load has a housing defining an anvil surface and a mandrel, movable relative to the housing under an applied load, defining a hammer surface to impact the anvil surface. A trigger mechanism for releasing the mandrel to ca... | 01/24/2006 |
| 6976533 | Method and system for accessing subterranean deposits from the surface Improved An improved method and system for accessing subterranean deposits from the surface that substantially eliminates or reduces the disadvantages and problems associated with previous systems and methods. In particular, the present invention provides an articul... | 12/20/2005 |
| 6964298 | Method and system for accessing subterranean deposits from the surface An improved method and system for accessing subterranean deposits from the surface substantially eliminates or reduces the disadvantages and problems associated with previous systems and methods. In particular, the present invention provides an articulated well with... | 11/15/2005 |
| 6964308 | Method of drilling lateral wellbores from a slant well without utilizing a whipstock In accordance with one embodiment of the present invention, a method for drilling a lateral wellbore from a slant well includes drilling the slant well below the surface of the earth such that the slant well is angled toward a first horizontal direction that coincid... | 11/15/2005 |
| 6942030 | Three-dimensional well system for accessing subterranean zones A method for accessing a plurality of subterranean zones from the surface includes forming an entry well from the surface and forming two or more exterior drainage wells from the entry well through the subterranean zones. The exterior drainage wells each extend outw... | 09/13/2005 |
