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| Number | Title | Issue Date |
| 7963348 | Expandable earth boring apparatus using impregnated and matrix materials for enlarging a borehole A tool for enlarging a borehole that includes an elongated tubular body; at least one movable arm affixed to the tubular body, the at least one movable arm comprising an outer surface formed of at least one of a matrix material and an abrasive material; and at least... | 06/21/2011 |
| 7954564 | Placement of cutting elements on secondary cutting structures of drilling tool assemblies A secondary cutting structure for sure in a drilling assembly, the secondary cutting structure including a tubular body and a block, extendable from the tubular body, the block including a first arrangement of cutting elements disposed on a first blade and a second ... | 06/07/2011 |
| 7451837 | Advanced expandable reaming tool An expandable reaming tool including at least two reamer pads connected to a tool body. The reamer pads are adapted to be displaced between a retracted position and an expanded position. At least one spiral blade is formed on at least one reamer pad. A plurality of ... | 11/18/2008 |
| 7451836 | Advanced expandable reaming tool An expandable reaming tool including at least two reamer pads connected to a tool body. The reamer pads are adapted to be displaced between a retracted position and an expanded position. At least one spiral blade is formed on at least one reamer pad. A plurality of ... | 11/18/2008 |
| 7410015 | Expandable drill bit An expandable drill bit comprises a body for mounting on a support string DS, a plurality of drill arms 3A, 3B, 3C, 3D, 4A, 4B, 4C, 4D coupled to the body and extending along a central longitudinal axis LL′, ... | 08/12/2008 |
| 7360595 | Method and system for underground treatment of materials A method for underground treatment of subsurface materials comprises providing an injection pattern and a recovery pattern, the injection pattern and the recovery pattern located proximate to a subsurface treatment zone and at least one of the injection pattern and ... | 04/22/2008 |
| 7343988 | Drilling apparatus A drilling apparatus for drilling a deviated bore comprising a tubular outer member having an offset and adapted for rotatably supporting a drill bit. The member has a gripping arrangement for selectively engaging the wall of a bore to restrain the member against ro... | 03/18/2008 |
| 7328637 | Apparatus for machining a cylinder bore surface and method of machining the cylinder bore surface using the apparatus An apparatus for machining a circumferential surface defining a cylindrical bore of a workpiece, the apparatus including a tool holder rotatable about a first rotation axis, and a form roller supported on the tool holder so as to be rotatable about a second rotation... | 02/12/2008 |
| 7293616 | Expandable bit An expandable drill bit for use with earth drilling equipment. The bit includes arms held in a closed position, so that the bit may be inserted through casing or a small bore hole. The arms are expandable to create an expanded drill bit having a crown profile common... | 11/13/2007 |
| 7264048 | Slot cavity A method for accessing a subterranean zone from the surface includes drilling a substantially vertical well bore from the surface to the subterranean zone and forming a slot cavity in the substantially vertical well bore proximate to the subterranean zone. The slot ... | 09/04/2007 |
| 7213644 | Cavity positioning tool and method In accordance with the teachings of the present invention, a method is provided for preventing formation of sludge in a subsurface cavity having particulate laden fluid disposed therein. The method includes positioning a downhole device having a fluid agitator into ... | 05/08/2007 |
| 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 |
| 7195085 | Drill bit An expandable drill bit comprises a body for mounting on a support string and two roller cutters mounted on the body. The cutters are movable between a smaller diameter first configuration and a larger diameter second configuration. In one embodiment the bit is adap... | 03/27/2007 |
| 7182157 | Enlarging well bores having tubing therein An underreamer for forming a cavity within a well bore includes a fluid motor having a first body and a second body arranged about a longitudinal axis. The first body is adapted to rotate about the longitudinal axis in relation to the second body when fluid is passe... | 02/27/2007 |
| 7168507 | Recalibration of downhole sensors In downhole drilling tools, a first set of inexpensive and/or relatively small sensors that typically have lower accuracy and higher drift than conventional downhole sensors are located in the drill string adjacent to the bit. A second set of highly accurate sensors... | 01/30/2007 |
| 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 |
| 7143847 | Drilling apparatus Drilling apparatus, such as an underreamer (20) comprises a generally cylindrical tubular body (22) and two cutting blades (26, 27) pivotally mounted to the body and movable between a retracted position and an extended position. Each cutting bla... | 12/05/2006 |
| 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 |
| 7093675 | Drilling method A method of drilling and lining a bore in an earth formation comprises providing a tubular outer elongate member and an inner elongate member located within the outer member. At least one of the members is spoolable. A drill bit is mounted to one of the members and ... | 08/22/2006 |
| 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 |
| 7048049 | Slant entry well system and method A system for accessing a subterranean zone from the surface includes an entry well bore extending down from the surface. A plurality of slanted well bores extend from the entry well bore to the subterranean zone. Drainage patterns extend from the slanted well bores ... | 05/23/2006 |
| 7036584 | Method and system for accessing a subterranean zone from a limited surface area A method and system for accessing subterranean resources from a limited surface area includes a first well bore extending from the surface to the target zone. The first well bore includes an angled portion disposed between the target zone and the surface to provide ... | 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 |
| 7004684 | Method for construction of piers in soil and a pier construction Apparatus and an associated method for forming a pier in a soil matrix includes a hollow tube with a restricted expansion section connected to and adjacent a soil penetrating bottom head element which is configured to facilitate discharge of pier forming material su... | 02/28/2006 |
| 7004264 | Bore lining and drilling A method of lining and drilling a bore (10) comprises the steps of mounting a first section of bore-lining tubing (20) on the lower end portion of a drill string (18). The method also includes running the drill string and tubing into a bore havi... | 02/28/2006 |
| 6976547 | Actuator underreamer An underreamer for forming a cavity from within a well bore includes a housing adapted to be disposed within the well bore. The underreamer includes an actuator partially slidably positioned in the housing. The actuator comprises a first portion and a second portion... | 12/20/2005 |
| 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 |
| 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 |
| 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 |
| 6962216 | Wedge activated underreamer An underreamer for forming a cavity from within a well bore includes a housing adapted to be disposed within the well bore. The underreamer includes at least one cutter, wherein each cutter has a first end and a second end. The first end of each cutter is pivotally ... | 11/08/2005 |
| 6953096 | Expandable bit with secondary release device The present invention generally relates to an apparatus and method of forming a wellbore. In one aspect, an expandable bit for use in a wellbore is provided. The expandable bit includes a body and a blade assembly disposed on the body. The blade assembly is movable ... | 10/11/2005 |
| 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 |
| 6929076 | Bore hole underreamer having extendible cutting arms A bore hole underreamer is provided having a hollow body with a longitudinal axis, which has an external wall, at least two cylindrical bores provided through the external wall and whose axes are transverse to the longitudinal axis. Each of the bores have a cylindri... | 08/16/2005 |
| 6920945 | Method and system for facilitating horizontal drilling A method for facilitating horizontal drilling by positioning in a well casing a shoe defining a passageway extending from an upper opening in the shoe through the shoe to a side opening in the shoe. A rod is connected, through at least one block and pin assembly ope... | 07/26/2005 |
| 6896077 | Rotary driven pipe-bursting tool An apparatus for bursting pipe is preferably adapted to receive rotational energy from the inner member of a dual-member drill string. In a preferred embodiment, an oscillating pipe-bursting member, driven by the interconnected inner members, cuts or bursts a subter... | 05/24/2005 |
| 6880650 | Advanced expandable reaming tool An expandable reaming tool including at least two reamer pads connected to a tool body. The reamer pads are adapted to be displaced between a retracted position and an expanded position. At least one spiral blade is formed on at least one reamer pad. A plurality of ... | 04/19/2005 |
| 6070677 | Method and apparatus for enhancing production from a wellbore hole An apparatus for enhancing production from a wellbore hole may include a body member having at least one cutting assembly. Each cutting assembly may have an upper, middle, and lower cutting arm. The cutting arms are hingedly connected to one another. An u... | 06/06/2000 |
| 5494121 | Cavern well completion method and apparatus A method and apparatus for increasing the diameter of a well bore in a cavern well completion after a drill pipe has been removed from the well bore and a drill bit has been removed from the drill pipe in which a reaming tool is formed with one or more cu... | 02/27/1996 |
