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| Number | Title | Issue Date |
| 7398832 | Mono-diameter wellbore casing An apparatus and method for forming a monodiameter wellbore casing. The casing includes a second casing positioned in an overlapping relation to a first casing. The inside diameter of the overlapping portion and at least a portion of the second casing are substantia... | 07/15/2008 |
| 7363970 | Expandable packer An integral bodied composite packer is constructed entirely of a composite material. It can include an expandable middle portion with an elastomeric cover to engage an exterior surface of a well bore. The expandable portion can include continuous strands of polymeri... | 04/29/2008 |
| 7347274 | Annular barrier tool The present invention provides for an annular barrier tool to block or restrict the flow of well fluids in the annular region of a well. ... | 03/25/2008 |
| 7341110 | Slotted slip element for expandable packer A packer device includes a central packer mandrel and a radially surrounding expansion mandrel that can expand radially. At least one slip mandrel carrying wickers surrounds the expansion mandrel and a plurality of axial slots are disposed within the slip mandrel. | 03/11/2008 |
| 7290609 | Subterranean well secondary plugging tool for repair of a first plug A secondary plugging tool is disclosed for use in a subterranean plug, such as in a plugged and/or abandoned well. The repaired plug may be of a cementicious material, or a mechanically, hydraulically or electrically set plug or packer. The plugging tool includes an... | 11/06/2007 |
| 7225870 | Hydraulic tools for setting liner top packers and method for cementing liners Embodiments of the present invention relate to hydraulic tools which may be used to set a liner top packer and/or may be used to resist the lifting forces of cementing pack-offs. One embodiment of a tool string for use in wellbore operations comprises a hydraulic an... | 06/05/2007 |
| 7222669 | Method of repair of collapsed or damaged tubulars downhole A method of repairing tubulars downhole is described. A swage is secured to a force magnification tool, which is, in turn, supported by an anchor tool. Applied pressure sets the anchor when the swage is properly positioned. The force magnification tool strokes the s... | 05/29/2007 |
| 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 |
| 7172029 | Bi-directionally boosting and internal pressure trapping packing element system The present invention is a packer for sealing an annular region in a wellbore. The packer includes a packing element which is held through bidirectional forces. The packer first comprises an inner mandrel. Disposed around the inner mandrel are three tubulars: (1) a ... | 02/06/2007 |
| 7165611 | Single trip perforation/packing method A method for performing single trip perforation and packing operations via a downhole assembly in a cased well bore is described. The assembly is provided with an upper packer and a lower packer and has fluid communication established therethrough. The upper packer ... | 01/23/2007 |
| 7096938 | Slip energized by longitudinal shrinkage A slip for an expanding hanger or patch is disclosed. The slip is mounted over the hanger body and has an internal profile that nests within a mating profile on the exterior of the hanger. When a compressive force is applied to the hanger, it shrinks longitudinally ... | 08/29/2006 |
| 7025146 | Alternative packer setting method Fluid setting pressure is delivered to a hydraulically set well packer through an external conduit strapped to the exterior of a well workstring above the packer assembly. The continuity of the external conduit is continued past the packer assembly by following a fl... | 04/11/2006 |
| 7017670 | Apparatus and method for expanding and fixing a tubular member within another tubular member, a liner or a borehole An apparatus for securing a tubular member within a liner or borehole has a seal means connected within the tubular member, and a pressure control device operable to increase the pressure within the tubular member, such that operation of the pressure control means c... | 03/28/2006 |
| 6959759 | Expandable packer with anchoring feature An expandable packer or anchor is disclosed. It features a gripping device integral to or mounted in a sleeve over the mandrel and mating undulating surfaces to help maintain grip under changing load conditions. Upon expansion, pressure on a sealing element is enhan... | 11/01/2005 |
| 6957698 | Downhole activatable annular seal assembly Devices and methods are described for establishing an effective annular seal about between an active pressure differential device and a surrounding wellbore sidewall. In other aspects, the invention provides a means of selectively activating such a seal during drill... | 10/25/2005 |
| 6938698 | Shear activated inflation fluid system for inflatable packers A subterranean well packer is inflated by a pumped transfer of rheotropic fluid through a tortuous flow channel into a packer sealing element expansion chamber. The tortuous flow channel and fluid delivery pressure are coordinated with the fluid properties to impose... | 09/06/2005 |
| 6926089 | Downhole actuation system utilizing electroactive fluids Downhole wellbore tools are actuated by electrically controllable fluids energized by a magnetic field, for example. When energized, the viscosity state of the fluid may be increased by a degree depending on the fluid formulation. Reduction of the controllable fluid... | 08/09/2005 |
| 6917176 | Gas main robotic inspection system The present invention provides a long-range, untethered, live, in-pipe inspection system that includes a self-propelled train having a plurality of modules; joint members for interconnecting adjacent modules, data collection components, and wireless communication co... | 07/12/2005 |
| 6908121 | Locking arrangement for a threaded connector A connector arrangement used for connecting and locking tubular members. The connector consists of two tubular members and a coupling member. The tubular members are threaded together to create a threaded connection. The locking arrangement is provided by a pathway ... | 06/21/2005 |
| 6902008 | Bi-directionally boosting and internal pressure trapping packing element system Present invention is a packer for sealing an annular region in a wellbore. The packer includes a packing element which is held through bi-directional forces. The packer first comprises an inner mandrel. Disposed around the inner mandrel are three tubulars: (1) a top... | 06/07/2005 |
| 6779601 | Inflatable packing element An inflatable packing element for a bridge plug. The packing element has an anchor portion and a sealing cover portion, each of which is expanded in order to engage and seal a surrounding string of casing or borehole. The anchor portion has a minimum length defined ... | 08/24/2004 |
| 6715560 | Collet-cone slip system for releasably securing well tools A selectively released well tool anchor has a tubular wicker shoe cage and a tubular setting sleeve in sliding assembly over a tubular mandrel. The wicker shoe cage confines a plurality of independent wicker shoes. The tubular setting sleeve has a conical slip face ... | 04/06/2004 |
| 6702031 | Anchoring device removal method and apparatus A method and apparatus for severing the mandrel of an anchor device such as a packer to release the packer and remove it from a well. A cutter locator profile above the packer assembly and a cutter locator element on the cutting tool are located so as to ... | 03/09/2004 |
| 6651749 | Well tool actuators and method The present inventions contemplate an improved well tool actuator and method that does not require more expensive downhole equipment and can be utilized with limited actuation pressures. According to the improved well tool actuator and method of the present ... | 11/25/2003 |
| 6568470 | Downhole actuation system utilizing electroactive fluids Downhole wellbore tools are actuated by electrically controllable fluids that are energized by a magnetic field. When energized, the viscosity state of the fluid may be increased by a degree depending on the fluid formulation. Reduction of the controllabl... | 05/27/2003 |
| 6341654 | Inflatable packer setting tool assembly An inflatable packer setting tool assembly is lowerable into a subterranean well bore and operable to set an inflatable packer therein. The tool assembly includes a fluid supply housing and a setting tool that is releasably interconnected to an inflatable... | 01/29/2002 |
| 6315041 | Multi-zone isolation tool and method of stimulating and testing a subterranean well A tool for isolating segments of a wellbore. The tool includes a packing cup housed in a protective sheath during the insertion of the device into the wellbore. The packing cup is radially outward biased. The protective sheath is removable. Upon removal o... | 11/13/2001 |
| 6230798 | Inflatable packer A hydraulic anchor packer for use in a well bore having an inflatable packer element (36) with a cylinder 38 and an elastomer sleeve 44 is provided on the exterior surface thereof. The elastomer sleeve 44 is retained by a suitable adhesive or fixing agent... | 05/15/2001 |
| 6223821 | Inflatable packer inflation verification system An inflation verification system for an inflatable tool includes at least an information collector associated with the inflatable element of the inflatable tool connected to a controller with a predetermined set of instructions for inciting communications... | 05/01/2001 |
| 6145598 | Hydrostatic, slow actuating subterranean well tool manipulation device and method A pressure balanced, slow actuating device and method for manipulation of an auxiliary tool within a subterranean well in which the hydrostatic pressure within well fluids in the well are utilized to meter and extend the timing of actuation of a component... | 11/14/2000 |
| 6129118 | Downstream plug A downstream plug is disclosed of a simplified structure where a dragging disc is used at a rear end to induce the expansion of locking elements engaging the pipeline. The locking results in an expansion cone being firmly held in place and forming a solid... | 10/10/2000 |
| 6032929 | Arrangement in connection with a yoke in a hoisting system for a derrick A hydraulically-operated hoist is disclosed. The hoist includes a plurality of hydraulic piston/cylinder arrangements, each having an upper end. Two guide rails are disposed in parallel with the hydraulic piston/cylinder arrangements. A self-aligning yoke... | 03/07/2000 |
| 5743333 | External casing packer with element end sleeve to collar retainer and method An external casing packer 10 is provided for positioning downhole along a tubular string in a well. Packer 10 includes a mandrel 12, an elastomeric sealing element 14, and an inflation chamber 26 for inflating the sealing element into sealing engagement w... | 04/28/1998 |
| 5505263 | Packer set safety valve for controlling dual fluid flows A packer set safety valve assembly for controlling annular and tubing flows within a subterranean wellbore is disclosed. The packer set safety valve assembly controls the annular and tubing flows through dual flow paths. The assembly includes a means, tha... | 04/09/1996 |
| 5404955 | Releasable running tool for setting well tool A well tool assembly and a method of operating same including a clutch which provides a rotary-driving connection between a running tool and well tool mandrel when the running tool is rotated in a first direction (e.g. clockwise) and has cammed surfaces w... | 04/11/1995 |
| 5297633 | Inflatable packer assembly An inflatable packer assembly for use in a subterranean well bore to isolate an interval of the well bore and/or adjacent subterranean formation for treatment. The assembly comprises a hanger assembly, a fluid piston assembly and at least one inflatable p... | 03/29/1994 |
| 5293905 | Pipeline plug A pipeline plug is disclosed wherein the rear portion of the plug is axially movable relative to the body of the plug and is provided with pipeline engaging drag inducing members. While the plug is propelled by the pipeline fluid flow, the dragging effect... | 03/15/1994 |
| 5271462 | Zone isolation apparatus A zone isolation apparatus is provided which allows for selective communication of fluid between a workstring and one or more subterranean zones. Fluid-pressure actuated packers may be placed in any desired location within a workstring without regard to t... | 12/21/1993 |
| 5220959 | Gripping inflatable packer A gripping inflatable packer having an elastomeric bladder expandable to sealingly engage the outer surface thereof against the wall surface of the well bore to effectively inhibit the passage of well fluid through the well bore. The gripping inflatable p... | 06/22/1993 |
| 5207272 | Electrically actuated well packer A method and apparatus of electrically and sequentially completing an oil and/or gas well through a tubing production string in a well casing. The operation includes electrically and sequentially actuating downhole equipment such as well packers, a safety... | 05/04/1993 |
