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| Number | Title | Issue Date |
| 7694752 | Dry drilling A method and apparatus for drilling a bore through a target includes advancing a drill bit into the target along a direction of advancement and injecting a directing gas in the direction of advancement through at least one aperture in the drill bit. As the bore is d... | 04/13/2010 |
| 7387176 | Down hole air diverter A down hole air diverter having a first opening in communication with the central passageway of a drillstring; a second opening in communication with the well bore annulus; and a means to control the flow of pneumatic fluid between the first opening and the second o... | 06/17/2008 |
| 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 |
| 7350597 | Drilling system and method A drilling system for drilling a bore hole into an earth formation, the bore hole having an inside wall. A drill string reaches into the bore hole from a surface, leaving a drilling fluid return passage between the drill string and the bore hole inside wall. A botto... | 04/01/2008 |
| 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 |
| 7281593 | Method for the circulation of gas when drilling or working a well A method for the circulation of gas when drilling or working a well. The method includes the step of pressurizing at least two chambers of a multi-chambered accumulator with inert gas. The chambers of the multi-chambered accumulator are operatively connected to one ... | 10/16/2007 |
| 7281886 | Suction device A suction device that is used with a power drilling tool for aspirating material removable during operation of the drilling tool, and which includes a suction head (20) displaceable relative to the drilling tool (2) in a direction opposite a drilling d... | 10/16/2007 |
| 7270186 | Downhole well pump The pump and pump system of the present invention is designed to remove liquids, gas, sand and coal fines from gas and/or oil well bores. There is a need in the oil and gas industry to develop a more efficient operating pump that is capable of operating in wells tha... | 09/18/2007 |
| 7270182 | Earth loop installed with sonic apparatus A method for installing a heat exchange pipe loop in a borehole, the method, in at least certain aspects, including drilling a borehole with a sonic drill system having a head and casing connected thereto, a drill apparatus on a lower end of the casing movable by th... | 09/18/2007 |
| 7267512 | Power assisted drill press A power assisted drill press having a feed cylinder fed by a variable pressure regulator which allows a user to controllably feed a bit and work material together while activating a drill motor to rotate the bit. An embodiment of the power assisted drill press utili... | 09/11/2007 |
| 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 |
| 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 |
| 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 |
| 7185719 | Dynamic annular pressure control apparatus and method A drilling system for drilling a bore hole into a subterranean earth formation, wherein at least a portion of the mud flow from the primary mud pump is diverted to the mud discharge outlet, thereby creating a backpressure system to readily increase annular pressure.... | 03/06/2007 |
| 7178592 | Closed loop multiphase underbalanced drilling process The present invention provides apparatus and methods for handling fluids returning from a well. The fluids are introduced into a separator and a separated gas stream is recovered or recycled. The gas stream may comprise more than one phase. The separated gas stream ... | 02/20/2007 |
| 7168488 | Method and plant or increasing oil recovery by gas injection A method and a plant for simultaneous production of a gas for injection into an oil field and production of methanol, dimethyl ether and/or other oxygenated hydrocarbons or production of higher hydrocarbons from natural gas is disclosed. An air separation unit (ATR)... | 01/30/2007 |
| 7165634 | Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells The steel drill string attached to a drilling bit during typical rotary drilling operations used to drill oil and gas wells is used for a second purpose as the casing that is cemented in place during typical oil and gas well completions. Methods of operation are des... | 01/23/2007 |
| 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 |
| 7147068 | Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells The steel drill string attached to a drilling bit during typical rotary drilling operations used to drill oil and gas wells is used for a second purpose as the casing that is cemented in place during typical oil and gas well completions. Methods of operation are des... | 12/12/2006 |
| 7143846 | Method for drilling and drilling apparatus to enable reverse circulation The invention relates to a method for drilling, being carried out by a drilling apparatus, having a drilling device (1) that comprises a casing part (2) and a drilling unit (3), in the drilling head (I) of which there are first drilling means ( | 12/05/2006 |
| 7140455 | Valve method for drilling with casing using pressurized drilling fluid A valve (30), a drill string valve assembly (10) and a method of drilling using compressed fluid as a drill drilling fluid are described. The valve and valve assembly (10) may be used in order to prevent escape of compressed fluid during the tim... | 11/28/2006 |
| 7131795 | Tool device, and method for drilling A tool, a device, and a method for drilling capable of very easily forming a hole part in a drilled matter by extremely smoothly discharging chips produced at drilled positions so as to maintain an excellent drilling efficiency. By using a drilling tool having a sha... | 11/07/2006 |
| 7107875 | Methods and apparatus for connecting tubulars while drilling The present invention provides an apparatus that permits sections of tubulars to be connected to or disconnected from a string of pipe during a drilling operation. The apparatus further permits the sections of drill pipe to be rotated and to be axially translated du... | 09/19/2006 |
| 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 |
| 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 |
| 7093657 | Earth loop installed with sonic apparatus A method for installing a heat exchange pipe loop in a borehole, the method, in at least certain aspects, including drilling a borehole with a sonic drill system having a head and casing connected thereto, a drill apparatus on a lower end of the casing movable by th... | 08/22/2006 |
| 7090023 | Apparatus and methods for drilling with casing The present invention provides an apparatus and methods to reduce ECD and pressure associated therewith while drilling with casing. In one aspect, the invention provides an energy transfer assembly locatable at a predetermined location in a casing string. The assemb... | 08/15/2006 |
| 7090436 | Process to prepare in-situ pilings in clay soil A method of forming in-situ pilings in clay soil. An auger stirrer is rotatably and axially forced into the ground. Water, dry binder (cement/or lime), and air are injected to lubricate the tool, and liquify the mix of clay soil, binder and air to form a uniform str... | 08/15/2006 |
| 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 |
| 7073589 | System for fracturing wells using supplemental longer-burning propellants A system for fracturing wells uses a primary propellant charge to initially produce pressures within the well in excess of the maximum fracture extension pressure of the surrounding formation, but below that which would cause damage to the well. A supplemental prope... | 07/11/2006 |
| 7048050 | Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells The steel drill string attached to a drilling bit during typical rotary drilling operations used to drill oil and gas wells is used for a second purpose as the casing that is cemented in place during typical oil and gas well completions. Methods of operation are des... | 05/23/2006 |
| 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 |
| 7040419 | Foamed compositions and methods of use in subterranean zones The current invention provides improved methods and compositions for completing a well bore. In one aspect, the current invention provides a process for preparing a foamed well composition. The process utilizes air to foam the composition after the air has been trea... | 05/09/2006 |
| 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 |
| 7036610 | Apparatus and method for completing oil and gas wells A method of drilling and completing a wellbore in a geological formation to produce hydrocarbons from a well comprising at least the following four steps: drilling the well with a retrievable drill bit attached to a casing; removing the retrievable drill bit from th... | 05/02/2006 |
| 7028585 | Wrenching tong Apparatus for applying torque to a first tubular relative to a second tubular, the apparatus comprising a first tong for gripping the first tubular and a second tong for gripping the second tubular, wherein the first tong is provided with teeth around a peripheral s... | 04/18/2006 |
| 7028586 | Apparatus and method relating to tongs, continous circulation and to safety slips A tong system includes an upper tong having grips for gripping a tubular and a rotation mechanism to rotate the grips and the tubular. A lower tong also has grips and a rotation mechanism to rotate the grips to provide rotation to a lower tubular, such that the uppe... | 04/18/2006 |
| 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 |
| 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 |
