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| Number | Title | Issue Date |
| 8176986 | Method of circulating while retrieving bottom hole assembly in casing Retrieving a down hole tool at a lower end of a string of casing can be performed with drill pipe during a casing-while-drilling operation. The operator suspends the casing on a landing sub landed in a drilling rig floor opening. A string of drill pipe is lowered in... | 05/15/2012 |
| 8146668 | Downhole tubular lifter and method of using the same A method of raising a tubular, comprising attaching a lifter to a tubular associated with a wellbore, and operating the lifter to transmit a downward force to a subterranean formation via a surface of the wellbore formed in the subterranean formation while also oper... | 04/03/2012 |
| 8061429 | Systems and methods for downhole completions Systems and methods for downhole completions. A downhole running tool can have a body having a bore formed therethrough. A latch member can be disposed on a first portion of the body. A reset member can be disposed on a second portion of the body. A conduit can be f... | 11/22/2011 |
| 8056639 | Well string injection system and method A continuous feed injection unit used for example for injection and removal of continuous well string from wells operates in a dual speed configuration. The unit comprises a first hydraulic motor, a second hydraulic motor, cooperating continuous well string gripping... | 11/15/2011 |
| 8025105 | Downhole tool retrieval and setting system Apparatuses and methods for retrieving a downhole tool from a wellbore are provided. The method includes running a retrieval tool into a wellbore on a conveyance. The retrieval tool configured to automatically manipulate into an engagement position with the downhole... | 09/27/2011 |
| 8006769 | Shearing tool and methods of use A shearing tool for shearing, trimming, or reducing objects being pulled through a drill string and methods for retrieving retrievable tools with fins from the drill string, where the retrievable tools must pass through restrictions in the drill string having interi... | 08/30/2011 |
| 7967072 | Logging head release mechanism A release mechanism for incorporation into a logging head. The release mechanism may be a tensile release mechanism that employs a plurality of tensile members for interchangeable insertion into a plurality of tensile compartments. As a result, a weakpoint for the l... | 06/28/2011 |
| 7845417 | Method of circulating while retrieving downhole tool in casing Retrieving a down hole tool at a lower end of a string of casing can be performed with drill pipe during a casing-while-drilling operation. The operator suspends the casing in the well from a drilling rig floor opening. A string drill pipe is lowered into the casing... | 12/07/2010 |
| 7836958 | Disconnect apparatus and method A disconnect apparatus and method for use in a well bore. The apparatus includes a top sub having a collet, and an external seal surface. The apparatus further includes a bottom sub having a bore. The external seal surface and the bore cooperate. The apparatus furth... | 11/23/2010 |
| 7819198 | Friction spring release mechanism A one-shot thermally activated release mechanism, the release mechanism including a spiral or helically wound spring wrapped around a set of jaws in a manner that prevents the jaws from expanding; held in this tightened position by two wires, with one wire fixed to ... | 10/26/2010 |
| 7779920 | Controlling backflow pressure during retrieval of bottom hole assembly A bottom hole assembly in a casing-while-drilling operation is retrieved by displacing the fluid in the casing string with a less dense fluid than the fluid in the annulus. The bottom hole assembly moves upward in the casing string in response to an upward force due... | 08/24/2010 |
| 7757773 | Latch assembly for wellbore operations A latch for interconnecting a first wellbore element and a second wellbore element in a manner such that the first and second elements can be conveyed into a wellbore in tandem and then disconnected from one another includes a first latch head connectable to the fir... | 07/20/2010 |
| 7748465 | Production tubing hydraulic release mechanism and method of use A release mechanism for removing a subsurface safety control valve from a production string in a well bore is mounted below the safety valve in operational engagement with the safety valve and the production string. The release mechanism has a two-part construction,... | 07/06/2010 |
| 7708076 | Method of using a drill in sand control liner A liner rotates a bit to make more hole. The liner has openings with inserts in them to lend torque resistance to the liner. The inserts have a passage with a send control media in the passage and a seal so that the liner can hold pressure for run in to get proper c... | 05/04/2010 |
| 7708077 | Retrieval of bottom hole assembly during casing while drilling operations A bottom hole assembly in a casing-while-drilling operation is retrieved attaching a wireline to the bottom hole assembly. The density of the fluid in the casing string is lightened to a lesser density than the fluid in the annulus, thereby creating a pressure diffe... | 05/04/2010 |
| 7665530 | Tubular grippers and top drive systems A tubular gripping system and a top drive drilling system with such a tubular gripping system, in at least some aspects, the gripping system beneath the top drive unit and, in at least some aspects, the gripping system having a body with four spaced-apart grippers m... | 02/23/2010 |
| 7650946 | Disconnect apparatus and method A disconnect apparatus and method for use in a well bore. The apparatus comprises a top sub having a collet, and wherein the top sub has an external seal surface. The apparatus further comprises a bottom sub having a bore, and wherein the external seal surface and t... | 01/26/2010 |
| 7604057 | Incremental U-tube process to retrieve of bottom hole assembly during casing while drilling operations A bottom hole assembly is retrieved through a casing string by lightening the density of the drilling fluid in the casing string above the bottom hole assembly to a lesser density than the drilling fluid in the casing string annulus. The bottom hole assembly moves u... | 10/20/2009 |
| 7431094 | Method for utilizing downhole safety joint A method of operating a safety joint that allows disconnection from a downhole section of a drill string without rotating the drill string. In an example class of embodiments, the innovative safety joint includes a sleeve with a j-slot that fits to a lug attached to... | 10/07/2008 |
| 7426964 | Release mechanism for downhole tool A release mechanism for a downhole tool is actuated by radial movement of a locking member. The locking member provided as much as full circumferential support in the locked position and once released can be prevented from re-gripping the previously connected elemen... | 09/23/2008 |
| 7419007 | Retrievable downhole pumping system A pumping system 10 is provided for pumping fluid from a downhole well to the surface through a production tubing string well. A rotatable drive rod 18 extends from the surface to power the downhole pump, and includes a plurality of rod couplings. The ... | 09/02/2008 |
| 7407005 | Electrically controlled release device A cable release apparatus includes a housing and latch mounted at one end of the housing. The latch has a central opening and a plurality of projecting members extending into the housing. A releasable connector is mounted inside the housing. An actuator has one end ... | 08/05/2008 |
| 7380603 | Well abandonment apparatus A well abandonment apparatus is described. The apparatus can be run on drillstring and does not require the use of explosives to sever the casing. The apparatus includes both a cutting device to perforate and sever the casing and a sealing device to prevent well flu... | 06/03/2008 |
| 7373988 | Liner running system and method A liner running system for placing a liner in a well bore comprises a latch sleeve connected to the liner and a running tool releasably attached to the latch sleeve. The latch sleeve has a wall thickness substantially the same as the wall thickness of the liner, and... | 05/20/2008 |
| 7373974 | Downhole release tool and method A release tool includes a first subassembly and a second subassembly. A connector is operable to selectively coupled the first subassembly to the second subassembly. A release guard is operable to selectively inhibit release of the connector. The release guard opera... | 05/20/2008 |
| 7371289 | Cleaning and doping of tubulars Apparatus for cleaning and doping a pin 2 of a tubular 3 during the making or breaking of a string on a well platform. The apparatus comprises a housing 4 having first and second conosed ends 6,7 and arranged in used to be secured at its ... | 05/13/2008 |
| 7367402 | Blow-out preventor make/break tool The present invention provides a tubular make/break tool having a body section and a center weldment positioned within the body section. There are at least two linear actuators in opposed orientation disposed in the body section and the linear actuators are connecte... | 05/06/2008 |
| 7363985 | Hydraulic latch for capillary tubing string An hydraulic latch for selectively securing and, when necessary, automatically releasing capillary tubing suspended in a well bore in a manner affording clearance of a subsurface safety valve through which the suspended capillary tubing is suspended prior to release... | 04/29/2008 |
| 7360589 | Articulating bail assembly and method An apparatus for performing well intervention work on a rig. The apparatus comprises a first spreader that is operatively connected to a derrick, a pair of I-beams that have a distal end and a proximal end, and wherein the distal end of the pair of I-beams are conne... | 04/22/2008 |
| 7353871 | Downhole automatic tool release and method of use A release tool adapted to be connected between a perforating gun and a tubing for releasing the perforating gun from the tubing after detonation of the perforating gun, the tool including a housing in connection with the tubing, the housing having an axial bore; an ... | 04/08/2008 |
| 7350562 | Drilling flange and independent screwed wellhead with metal-to-metal seal and method of use A drilling flange and an independent screwed wellhead provides a metal-to-metal seal that supplements the traditional elastomeric O-rings for providing a fluid seal between the drilling flange and the wellhead. The metal-to-metal seal may be achieved using a metal r... | 04/01/2008 |
| 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 |
| 7343979 | Method and device for the controlled disconnection of a wireline A method and device for controlling the disconnection of a wireline (4), of the kind used in wireline operations in a wellbore, from a wireline tool (8), the wireline (4) being provided with a conductor (6) arranged to communicate signals... | 03/18/2008 |
| 7337852 | Run-in and retrieval device for a downhole tool A run-in and retrieval device for a downhole tool comprises a first set of lugs disposed on a first component of the device connected to a tool string, and a second set of lugs disposed on a second component of the device connected to the downhole tool, wherein the ... | 03/04/2008 |
| 7337851 | Rotating stuffing box with split standpipe A system comprising a top mounted rotating stuffing box is provided for use with downhole pump (e.g., Progressing Cavity Pump) applications. The system also includes a split standpipe configuration that allows the stuffing box to be quickly installed or removed as n... | 03/04/2008 |
| 7322410 | Controllable production well packer An apparatus and method for operating an electrically powered device in a packer using the piping structure of the well as an electrical conductor for providing power and/or communications. The electrically powered device may comprise an electrically controllable va... | 01/29/2008 |
| 7322430 | Apparatus and method for reducing required torque A method of reducing the torque required to provide relative rotation of two connected members includes providing impacts at or adjacent the connection between the two members at a rate of at least two impacts per second. An apparatus for reducing the torque require... | 01/29/2008 |
| 7320374 | Wellbore top drive systems A system for wellbore operations, the system, in at least certain aspects, including a derrick, a guide beam connected to the derrick, a top drive movable on the guide beam, torque reaction structure connected to the guide beam and to the derrick, skid apparatus hel... | 01/22/2008 |
| 7284616 | Selectively retrievable wear bushing for subsea or surface applications The present invention is directed to an assembly for installing and selectively retrieving a wear bushing in the bore of a subsea or surface wellhead. The assembly includes a bit sub, which is adapted for attachment to a drill string, a drill string adapter removabl... | 10/23/2007 |
| 7281592 | Injecting a fluid into a borehole ahead of the bit A method and system for introducing a fluid into a borehole, in which there is arranged a tubular drill string including a drill bit, wherein the drill bit is provided with a passageway between the interior of the drill string and the borehole, and with a removable ... | 10/16/2007 |
