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| Number | Title | Issue Date |
| 8122960 | Spoolable coiled tubing spear for use in wellbores and methods of using same Coiled tubing spears for retrieving a section of cut coiled tubing comprises a mandrel having attachment members, e.g., spears, at upper and lower ends for facilitating connection of the upper end of the mandrel to a spooled section of coiled tubing and the lower en... | 02/28/2012 |
| 8074716 | Tension-activated fluid bypass device and associated method A fluid bypass tool that can be incorporated into a fishing arrangement between a fluid-operated latching tool and a fluid-operated jarring tool. The latching tool is actuated with fluid from the surface to be latched to and unlatched from a stuck tool in the wellbo... | 12/13/2011 |
| 8002036 | Internal release connector and method A tubing connection release system. The system includes, a male connector having a profile at one end thereof and receptive to a tubular at the other end thereof, a female connector receptive to a tubular at one end thereof and receptive to the male connector at the... | 08/23/2011 |
| 7980311 | Devices, systems and methods for equalizing pressure in a gas well Devices, systems and methods for equalizing pressure in a gas well are provided. A jar device is coupled to a pump deployed in a gas well between areas of low pressure and high pressure. The jar device includes a mandrel and a no-go sleeve. A jarring tool is operate... | 07/19/2011 |
| 7980310 | Backoff sub and method for remotely backing off a target joint A backoff sub includes a housing and a backoff facilitator at least partially within the housing. The backoff sub is a part of the string that is stuck and is capable of adding energy to the string within which the sub is disposed to facilitate backing off of a port... | 07/19/2011 |
| 7931085 | Internal release connector and method A tubing connection release system. The system includes, a male connector having a profile at one end thereof and receptive to a tubular at the other end thereof, a female connector receptive to a tubular at one end thereof and receptive to the male connector at the... | 04/26/2011 |
| 7905289 | Double-acting jar compounder A double-acting compounder is disclosed having a first end and a second end, and comprising an outer housing, an upper mandrel, and a lower mandrel. The outer housing defines the first end. The upper mandrel is at least partially disposed telescopically within the o... | 03/15/2011 |
| 7874364 | Method for jarring with a downhole pulling tool The present invention generally relates to an apparatus and method of jarring with an overpull generator. In one aspect, a method of dislodging an object stuck in a wellbore is provided. The method includes the step of running an assembly into the wellbore on a conv... | 01/25/2011 |
| 7828062 | Downhole tool An extension sub for a downhole fishing tool, the extension sub comprising a tubular having a threaded pin end and a threaded box end, the tubular having an interior wall defining a bore, and cutting elements fixed to the interior wall of the tubular and extending i... | 11/09/2010 |
| RE41759 | Lockable swivel apparatus and method A lockable swivel (4) for use in drilling applications which allows the operator to selectively engage and disengage the swivel (4). The lockable swivel (4) is comprised of a locking mandrel (7) carried in a body (3) which engages,... | 09/28/2010 |
| 7775280 | Jars for wellbore operations An example of an apparatus for jarring a wellbore tool from an obstruction includes four sub-assemblies in communication with three springs such that the springs may be compressed forcing the subassemblies to become adjacent to one another. When the springs are actu... | 08/17/2010 |
| 7708072 | Accessories and method for hollow stem auger retraction Withdrawing a hollow stem auger string from a well includes a retractor having C-shaped inter-coil insertions and a hoist having tong-arms, one which terminates in an inwardly disposed pin. The retractor connects to a drilling rig's hydraulic cylinder vertical drive... | 05/04/2010 |
| 7690430 | Well casing extraction accessories and method A tool for extracting well pipe casings resembles an enlarged pipe-thread tap. The tool is designed to be suspended under and driven by the traveling rotary table and hydraulic vertical drive system of a conventional drilling rig. By this means, well pipe casings ar... | 04/06/2010 |
| 7661477 | System and method for unsticking a tool stuck in a wellbore An unsticking assembly for releasing a tool that is stuck in a wellbore including a first anchor actuatable between an engaging position wherein the first anchor engages a wall of the wellbore and a retracted position wherein the first anchor does not engage the wal... | 02/16/2010 |
| 7637321 | Apparatus and method for unsticking a downhole tool A downhole tool is provided including apparatus for unsticking the tool from the wall or a borehole. The tool may include a housing defining a longitudinal axis and a sleeve coupled to the housing and mounted for rotation relative to the housing, the sleeve having a... | 12/29/2009 |
| 7591314 | Measurement-while-fishing tool devices and methods Methods and devices for sensing operating conditions associated with downhole, non-drilling operations, including, fishing and retrieval operations as well as underreaming or casing cutting operations and the like. A condition sensing device is used to measure downh... | 09/22/2009 |
| 7578348 | Overshot tool for retrieving an object in a well and methods of use therefor An overshot tool for retrieving an object in a well includes a housing having a housing bore with upper and lower portions. A cam having a cam bore is carried in the upper portion of the bore. The housing and the cam are rotatable relative to each other from an alig... | 08/25/2009 |
| 7556101 | Downhole retrieving tool and method Disclosed herein is a downhole retrieving tool. The tool includes, a tubular member with a deformable portion having a reduced internal dimension, and a swage member engagable with the reduced internal dimension such that movement of the swage member through the def... | 07/07/2009 |
| 7533724 | Downhole intelligent impact jar and method for use An intelligent downhole impact jar device is described that is able to sense well bore angle or deviation and alter the effective jar impact load based upon the sensed information. The impact jar device includes a jarring portion for creating jarring impacts within ... | 05/19/2009 |
| 7523786 | Apparatus and method for freeing deployment cables stuck in a wellbore An apparatus for freeing a cable that is lodged in a wellbore without dislodging the well tool carried by cable includes a housing connectable about the cable and means for engaging the cable upon impact with the well tool to reduce the impact of the outer housing o... | 04/28/2009 |
| 7510008 | Method and apparatus for decreasing drag force of trigger mechanism Method and apparatus for decreasing drag force in a mechanism for releasing a mandrel is provided. The mandrel is released by a collet, which is controlled by a trigger sleeve. Most of the axial force on the collet is relieved, thereby decreasing the frictional forc... | 03/31/2009 |
| 7503388 | Circumferentially loaded slip-type overshot retrieval tool Overshot fishing tools for retrieving objects, i.e., “fish” lodged within a wellbore are disclosed. The overshot fishing tool comprises a housing having a housing bore with at least one recess disposed along the inner wall surface of the housing bore. A slip is ... | 03/17/2009 |
| 7497260 | Junk removal tool A junk removal tool (10) for use in a well bore. The tool includes a multi-faceted face (42) of tungsten carbide to break up large pieces of junk. The junk is then captured in the tool via large area inlet ports (40) and collected in a trap (... | 03/03/2009 |
| 7395862 | Combination jar and disconnect tool A combination jarring tool and disconnect device is disclosed in which the jarring events may be followed by separate disconnect event, or in which the jarring events may coincide with disconnect events. The tool generally comprises a housing and a sleeve in concent... | 07/08/2008 |
| 7367397 | Downhole impact generator and method for use of same A downhole impact generator (60) is adapted to be moved to a target location within a wellbore (68) for transmitting a jarring force to a well tool (72) positioned in the wellbore (68). The downhole impact generator (60) includes a... | 05/06/2008 |
| 7363717 | System and method for using rotation sensors within a borehole A system and method for using a survey tool within a borehole is provided. The survey tool includes a plurality of rotation sensors each having a sensing axis and a direction of least acceleration sensitivity. The sensing axes of the plurality of rotation sensors ar... | 04/29/2008 |
| 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 |
| 7357030 | Apparatus and methods for determining at least one characteristic of a proximate environment Methods and an apparatus for determining at least one characteristic of an environment are disclosed. A vibrational energy may be imparted into an environment and a magnitude of damping of the vibrational energy may be measured and at least one characteristic of the... | 04/15/2008 |
| 7343977 | Translating downhole tool A tool for generating a force downhole comprises a body, a longitudinally movable activating member mounted to the body, and a longitudinally movable driven member also mounted to the body. The driven member is operatively associated with the activating member such ... | 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 |
| 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 |
| 7314080 | Slidable sleeve plunger An improved plunger lift mechanism comprises an internal hollow body having bypass orifices that, when exposed, allow fluid to pass through during plunger descent in a downhole tube to the bottom of a production well. A slidable sleeve slides along the hollow body t... | 01/01/2008 |
| 7311149 | Jar with adjustable preload A jar provided with an adjustable preload 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 cause the ... | 12/25/2007 |
| 7299872 | Hydraulic-mechanical jar tool A jar mechanism comprises a housing having a fluid chamber therein, a piston encircled by an annular metering sleeve and movably mounted in the fluid chamber for movement between a first position and a second position, and a jar member moveably mounted in the housin... | 11/27/2007 |
| 7299885 | Downhole drill string having a collapsible subassembly and method of loosening a stuck drillstring A method and apparatus for allowing a downhole drill string to be stuck at one location and continue to rotate above the stuck section. The apparatus provides a method for collapsing the stuck subassembly by reducing its outside diameter. Simultaneous with the subas... | 11/27/2007 |
| 7293614 | Multiple impact jar assembly and method A hydraulic jarring tool may be suspended in a well from a wireline, tubular string or drill string, and may be activated to release a tool stuck in the well, or to release the drill string. Each of an upper and lower jarring section include a housing, a piston, a p... | 11/13/2007 |
| 7281588 | Tubular injector apparatus and method of use The invention generally relates to apparatus and methods for moving tubulars into and out of a well bore, and particularly, a tubular injector with two or more gripping members which bind the outer surface of the tubular, two or more actuators which cause the grippi... | 10/16/2007 |
| 7281575 | Field adjustable impact jar An impact jar including a biasable member, an impactor and an impactee slidably coupled to the impactor. The impactor includes a first down-hole tool connector. The impactee includes a second down-hole tool connector distal from the first down-hole tool connector an... | 10/16/2007 |
| 7267176 | Downhole resettable jar tool with axial passageway and multiple biasing means A wireline jar tool delivers instrument packages into wellbores and retrieves tools when they get stuck. The jar has several stored spring chambers connected to accelerate an upper spring chamber away from a stuck lower carrier chamber that supports instrument packa... | 09/11/2007 |
| 7264055 | Apparatus and method of applying force to a stuck object in a wellbore An apparatus for applying a force to a stuck object in a wellbore that includes a work string extending in the wellbore is provided. A vibrating string has a vibrator engaged with the stuck object. The vibrator drives the vibrating string to impart the force to the ... | 09/04/2007 |
