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| Number | Title | Issue Date |
| 7392857 | Apparatus and method for vibrating a drill bit In one aspect of the invention a drill bit comprises an axis of rotation a body and a working face. The body comprises a fluid passageway with a first seat and houses a jack element substantially coaxial with the axis. A stop element is disposed within the passagewa... | 07/01/2008 |
| 7389833 | Multi-sectional percussive drill bit assembly A multi-sectional percussive drill bit assembly for drilling holes in earth formation primarily used in conjunction with a pneumatic percussive device. The drill bit assembly is comprised of an easily removable bit that is rotationally driven by a lug and pocket str... | 06/24/2008 |
| 7387174 | Device and method of lining a wellbore A method of sealing the wall of a wellbore (1) as it is being drilled through a subterranean formation using a drill string (3) having a drill bit (4) on the lower end thereof comprises fitting to the lower end of a drill string (3) a dev... | 06/17/2008 |
| 7377335 | Method and apparatus for movement of drilling equipment between adjacent locations An apparatus and method for the movement of drilling equipment between topographically adjacent drilling locations comprises positioning a transportable planar surface over the adjacent drilling locations between which it is desired to move the equipment. Ports or o... | 05/27/2008 |
| 7377334 | Rotating drilling head drive Methods and apparatus for rotating a stripper assembly in use with a rotating drilling head. A drive system is disposed external to the rotating drilling head and generates rotational motion to match the rotation of a drillstring running through the rotating drillin... | 05/27/2008 |
| 7370702 | Single mill casing window cutting tool and method An apparatus for cutting a window in a casing pipe in a well, having only a single mill with full gage primary cutting inserts of a very hard, highly wear resistant, material. The primary inserts can be protected from damage by forming each blade on the mill with an... | 05/13/2008 |
| 7367389 | Tubing expansion There are disclosed methods and apparatus for expanding tubing downhole. In one embodiment, there is disclosed a method of expanding downhole tubing such as a liner (10), the method comprising the steps of locating the liner (10) in a borehole (... | 05/06/2008 |
| 7367410 | Method and device for liner system Method for drilling and lining a well wherein at least one liner (1, 2, 32) with a larger external diameter than the substantial part of a drilling riser (10) is pre-installed at a point below the substantial part of the drilling riser (10). A b... | 05/06/2008 |
| 7367405 | Electric pressure actuating tool and method Disclosed herein is a downhole tool actuation arrangement. The arrangement includes a housing having a chamber, at least one piston in operable communication with the chamber and at least one electrode exposed to the chamber. The electrodes are receptive to a power ... | 05/06/2008 |
| 7367143 | Cutter and method for working the soil A cutter for working the soil includes a cutting frame, at least two cutting wheels that are supported on the cutting frame in a rotatably drivable manner about parallel axes of rotation, and an adjusting device, The adjusting device functions to adjust the center d... | 05/06/2008 |
| 7363991 | System and method for relocating extended length objects A system and method for lifting and translating extended length objects includes a power roller assembly attached to an extendable mast. When a roller on the power roller assembly contacts the outer surface of the extended length object, extension or retraction of t... | 04/29/2008 |
| 7363691 | Method and apparatus for forming a mono-diameter wellbore casing A mono-diameter wellbore casing. The mono-diameter wellbore casing is formed by plastically deforming and radially expanding a first tubular member within a wellbore. A second tubular member is then plastically deformed and radially expanded in overlapping relation ... | 04/29/2008 |
| 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 |
| 7363734 | Lubricated trench wall cutter with remote lubricant inlet port The invention relates to a trench wall cutter comprising a bearing shield, on which at least one cutting wheel is supported in a rotatable manner. Between the cutting wheel and the bearing shield at least one sealing member is provided. For the lubrication of the se... | 04/29/2008 |
| 7363733 | Device and method for making a trench wall in the soil The invention relates to a device for making a trench wall in the soil comprising a frame, at least one lower cutting/mixing wheel arranged at the bottom of the frame, at least one further, upper cutting/mixing wheel arranged at the top of the frame, wherein the fra... | 04/29/2008 |
| 7363990 | Cutting device and method for producing a cut hole A cutting device for sinking a cut hole in the ground, having a support on which are mounted in rotary manner about in each case one cutting wheel rotation axis at least two cutting wheels, at least one cutting wheel drive mechanism for the rotary driving of the cut... | 04/29/2008 |
| 7360608 | Rotary drill bits including at least one substantially helically extending feature and methods of operation A rotary drill bit is disclosed, including at least one cutting element affixed thereto and configured to form a distinct borehole surface in response to drilling a subterranean formation. At least one substantially helically extending feature associated with the at... | 04/22/2008 |
| 7360611 | Flow system for a hydraulic choke solids strainer A strainer system having two separate strainers positioned in parallel, where one strainer can be cleaned while still permitting normal flow through the other strainer. The system flow circuit is arranged so that a high pressure backwashing flow can be applied to on... | 04/22/2008 |
| 7360612 | Roller cone drill bits with optimized bearing structures A roller cone drill bit may include optimally designed bearing structures and cutting structures. The roller cone drill bit may include three cone assemblies rotatably mounted on respective spindles via respective bearing structures. Each cone assembly may have a re... | 04/22/2008 |
| 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 |
| 7357188 | Mono-diameter wellbore casing A mono-diameter wellbore casing is formed by radially expanding a first tubular liner off of a mandrel into contact with a second tubular liner. The first and second tubular liners are positioned within the wellbore in an overlapping relationship. The overlapping po... | 04/15/2008 |
| 7357200 | Earth auger An earth auger presents a shank having a spiral earth removing structure therearound. The structure first presents a series of spirally positioned housings with cutting teeth therein followed by a spiral cutting edge about the shank. The teeth are radially, vertical... | 04/15/2008 |
| 7357196 | Method and system for predicting performance of a drilling system for a given formation A method and apparatus for predicting the performance of a drilling system for the drilling of a well bore in a given formation includes generating a geology characteristic of the formation per unit depth according to a prescribed geology model, obtaining specificat... | 04/15/2008 |
| 7353887 | Control systems and methods for active controlled bottomhole pressure systems An active differential pressure device (APD device) in fluid communication with a returning fluid creates a differential pressure across the device, which controls pressure below the APD Device. In embodiments, a control unit controls the APD Device to provide a sel... | 04/08/2008 |
| 7353888 | Tension/collar/reamer assemblies and methods The present invention provides drilling assembles and methods that are especially useful for a bottom hole drilling assembly for drilling/reaming/or other operations related to drilling a borehole through an earth formation. In one embodiment, the drilling assembly ... | 04/08/2008 |
| 7356450 | Methods for designing roller cone bits by tensile and compressive stresses A method for designing a roller cone bit that includes steps of selecting design parameters for the roller cone bit, drilling parameters, and parameters of an earth formation, simulating drilling of the earth formation by the roller cone bit using the selected drill... | 04/08/2008 |
| 7350590 | Instrumentation for a downhole deployment valve The present generally relates to apparatus and methods for instrumentation associated with a downhole deployment valve or a separate instrumentation sub. In one aspect, a DDV in a casing string is closed in order to isolate an upper section of a wellbore from a lowe... | 04/01/2008 |
| 7350595 | Drilling device and drilling method A drilling device is composed so as to drill a drilled object composed of a brittle material with the end of a rotating core bit by using a core bit in which a bit, formed by dispersing and arranging a cemented carbide or super abrasive in a binder phase, is provide... | 04/01/2008 |
| 7350596 | Methods and apparatus for expanding the diameter of a borehole A borehole reamer which may be deployed to a desired depth in an existing uncased borehole or below existing casing and used to substantially expand the diameter of the borehole. The diameter may be expanded by an amount that ranges from a fraction to a multiple of ... | 04/01/2008 |
| 7350586 | Casing running tool and method of using same An automated tubular running tool for use in drilling systems and the like allows for the picking up, positioning, stabbing and threadedly connecting a tubular segment to a tubular string being held by the rig by a spider. The tool comprises a pivoting arm, which ca... | 04/01/2008 |
| 7350587 | Pipe guide A guide is disclosed for facilitating the movement of tubulars in well operations. In one aspect, the guide is a pipe guide with a base, an upper extension apparatus, a lower extension apparatus with a first end pivotably secured to the upper extension apparatus and... | 04/01/2008 |
| 7350571 | Methods of preparing and using coated particulates The present invention involves methods of preparing coated particulates and using such coated particulates in subterranean applications such as production enhancement and sand control. One embodiment of the present invention provides a method of preparing coated par... | 04/01/2008 |
| 7347282 | Steerable soil penetration system A steerable soil penetration system having a steerable penetration head, which compacts and does not cut away the surrounding soil and which is connected to an elongate flexible tubing such that the orientation of the penetration head can be varied relative to the t... | 03/25/2008 |
| 7347285 | Drilling machine having a movable rod handling device and a method for moving the rod handling device A drilling machine including a frame, a tower, a rotary head, and a rod handling device. The frame is supported for movement over the ground and the tower is mounted on the frame. The rotary head is movable along the tower and is engageable with the drill string for... | 03/25/2008 |
| 7347290 | Multi-part energizer for mechanical seal assembly An energizer for a mechanical seal assembly for use in a drill bit is disclosed. The energizer is a composite of at least two resilient materials, one having a durometer hardness that is greater than the other. The material contacting a journal provides relatively h... | 03/25/2008 |
| 7343983 | Method and apparatus for isolating and testing zones during reverse circulation drilling A zone isolating and testing apparatus comprising an isolation tool and a downhole flow control means and a method of using such apparatus. The zone isolating and testing apparatus is particularly useful for testing zones during reverse circulation drilling using co... | 03/18/2008 |
| 7343985 | Bit balling treatment A solid body contains a surfactant and crushed walnut hulls. The solid body is shaped to predetermined dimensions that permit passage through the central interior opening of drill pipe. The solid body dissolves in drilling mud for delivery of a pill to the annulus t... | 03/18/2008 |
| 7341116 | Drilling efficiency through beneficial management of rock stress levels via controlled oscillations of subterranean cutting elements A device and system for improving efficiency of subterranean cutting elements uses a controlled oscillation super imposed on steady drill bit rotation to maintain a selected rock fracture level. In one aspect, a selected oscillation is applied to the cutting element... | 03/11/2008 |
| 7337858 | Drill bit assembly adapted to provide power downhole In one aspect of the invention, a drill bit assembly has a body portion intermediate a shank portion and a working portion, the working portion having at least one cutting element. The working portion also has an opening to an axial chamber disposed in the body port... | 03/04/2008 |
| 7338608 | Solid-liquid separation of oil-based muds This invention relates to a method of achieving a solid-liquid separation of an oil-based mud comprising the step of contacting said oil-based mud with a water-in-oil emulsion comprising a polymer derived from at least one water-soluble monomer, where the polymer is... | 03/04/2008 |
