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| Number | Title | Issue Date |
| 7677334 | Anti-surge/reverse thruster An anti-surge/reverse thrusting tool for reducing the forces on a drill bit used in subterranean well drilling operations along with methods for drilling wells using a drill string employing the tool. The tool utilizes the pressure differential between drilling flui... | 03/16/2010 |
| 7677333 | Drill bit with multiple cutter geometries A drill bit has cutting elements with multiple cutting surface geometries that are positioned so that their cutting profiles overlap, but do not completely contain or engulf one another. The different cutting surface geometries and the specific overlap create a zone... | 03/16/2010 |
| 7673706 | Down-the-hole hammer with pilot and method of enlarging a hole A down-the-hole hammer includes a piston movably disposed in a casing and a percussion bit at an end of the casing. The percussion bit includes an integral bit and shank and a pilot removably fastened at a forward end of the bit. A method of enlarging a preexisting ... | 03/09/2010 |
| 7673707 | Drilling apparatus and system for drilling wells A device for boring a well. The device is attached to a motor that has a power shaft for imparting rotational movement. The device comprises a driver operatively connected to the power shaft, with the driver containing a tubular body, a first bit having a first end ... | 03/09/2010 |
| 7665545 | Pressure controlled downhole operations A method and apparatus for temporarily increasing fluid pressure at a specific location in a work string to perform an operation in an oil or gas well bore. Apparatus is provided which, in a first position provides fluid flow through the work string; in a second pos... | 02/23/2010 |
| 7661487 | Downhole percussive tool with alternating pressure differentials A downhole percussive tool is disclosed comprising an interior chamber and a piston element slidably sitting within the interior chamber forming two pressure chambers on either side. The piston element may slide back and forth within the interior chamber as drilling... | 02/16/2010 |
| 7658241 | Underreaming and stabilizing tool and method for its use Provided is a drilling tool that includes a tubular body defining a longitudinal axial cavity extending therethrough. The tubular body also defines at least one radial guidance channel extending radially from the axial cavity through the tubular body. A cutter eleme... | 02/09/2010 |
| 7658243 | System and method for preventing slippage and rotation of components in a tubular housing Systems and methods for preventing slippage and rotation of components installed in a tubular housing member and/or along a rotatable tubular shaft during drilling operations are disclosed herein. The housing and/or rotatable shaft include a shoulder disposed proxim... | 02/09/2010 |
| 7658242 | Hole coring system with lever arm A hole coring system for drilling large diameter holes with a handheld tool. The drill bit is guided by a mandrel attached to the concrete and serves as a central guidepost that ensures precise centering of the drill bit. Commonly available tools may be used to rota... | 02/09/2010 |
| 7654341 | Drill stem coupling and method for a directional drill A drill stem connection assembly includes a first drill stem section and a second drill stem section. At least one engaging feature is located at an end of the first drill stem section. At least one mating feature accepts the at least one engaging feature. The at le... | 02/02/2010 |
| 7654342 | Underreaming and stabilization tool for use in a borehole and method for its use An underreaming tool may include a tubular body, a drive tube, at least one blade element (“the blade element”), at least one wedge element (“the wedge element”), and a stop mechanism. The drive tube may include at least one longitudinal groove (“the longi... | 02/02/2010 |
| 7650951 | Resettable actuator for downhole tool In one embodiment of the invention, a downhole tool string component comprising a through bore running there through formed to accept drilling fluid. At least one mechanical actuation device is also disposed within the through bore. A guide channel is disposed withi... | 01/26/2010 |
| 7647989 | Backup safety flow control system for concentric drill string A technique is presented for providing a double-barrier to formation fluids during drilling operations with a concentric drill string having an inner bore and an annulus. A primary flow control system is used to provide a first barrier to formation fluids in the inn... | 01/19/2010 |
| 7640999 | Coiled tubing and drilling system A technique facilitates combined drilling and coiled tubing operations from a single bed of a rig. A mast is mounted to the bed, and a coiled tubing injector is connected to the mast. The coiled tubing injector is able to move coiled tubing into and out of a wellbor... | 01/05/2010 |
| 7637329 | Methods and systems for drilling auxiliary holes Systems and methods for drilling auxiliary holes such as conductor holes, ratholes, and mouseholes useful in drilling operations. The systems and methods include the use of a portable drilling apparatus that is selectively mountable on a rig's drill floor and is rem... | 12/29/2009 |
| 7624819 | Universal joint assembly A universal joint assembly includes an assembly housing, an assembly cap coupled to the assembly housing, a rotatable mandrel, a plurality of substantially spherical drive balls, and a floating washer. The assembly housing has a plurality of pockets formed in an int... | 12/01/2009 |
| 7624818 | Earth boring drill bits with casing component drill out capability and methods of use A drill bit includes a bit body having a face on which two different types of cutting elements are disposed, the first type being cutting elements for drilling at least one subterranean formation and the second type being cutting elements for drilling through a casi... | 12/01/2009 |
| 7617887 | Method for casing drilling, drilling unit and adapter device A method for casing drilling, a drilling unit and an adapter device. The adapter device to be used in extension drill equipment drilling comprises an inner piece which can be rotated by the rotation device of the rock drilling machine. Around the inner piece, there ... | 11/17/2009 |
| 7607496 | Drilling apparatus and system for drilling wells A device for boring a well with casing. The device is attached to a motor that has a power shaft for imparting rotational movement. The device comprises a driver operatively connected to the power shaft, with the driver containing a cylindrical body, a first bit hav... | 10/27/2009 |
| 7600585 | Coiled tubing drilling rig The present invention provides a rig capable of both coiled tubing and conventional drilling. The rig comprises a mast unit having a drilling mast and a catwalk. The mast unit is adapted for rotary drilling and casing operations. The rig further comprises a drill fl... | 10/13/2009 |
| 7594551 | Downhole supercharger process A method and apparatus to stop the influx of down hole fluids while drilling utilizing the downhole Supercharger Process including the steps of providing a down hole fluid supercharger tool in he drilling operation; detecting permeable zones at the surface while dri... | 09/29/2009 |
| 7571778 | Method of drilling a bore hole A method to drill a borehole includes drilling the borehole through an overburden with a drill bit selected to optimize a drilling performance parameter and drilling the borehole through a production zone with another drill bit selected to optimize a production perf... | 08/11/2009 |
| 7568534 | Dual-edge working surfaces for polycrystalline diamond cutting elements A polycrystalline diamond cutting element for earth boring drill bits presents regions of different abrasion resistance to the earthen formation when in operation. The cutting element has an end working surface and a region which is substantially free of catalyzing ... | 08/04/2009 |
| 7568533 | Pipehandler A pipe handling system is disclosed with an elongated base that is dimensioned to receive and support a movable tray in a position parallel to the base with at least two degrees of freedom of movement. The movable tray is also dimensioned to receive at least one sec... | 08/04/2009 |
| 7549485 | Expandable reamer apparatus for enlarging subterranean boreholes and methods of use An expandable reamer apparatus and methods for reaming a borehole are disclosed, including at least one laterally movable blade carried by a tubular body selectively positioned at an inward position and an expanded position. The at least one laterally movable blade,... | 06/23/2009 |
| 7549486 | Screen apparatus and method A screen apparatus for use in a well bore. The apparatus comprises a latch; a first tubular disposed within the latch, the first tubular having an internal retrieving profile; a screen extending from the first tubular, and wherein the screen contains a first portion... | 06/23/2009 |
| 7546886 | Method of creating a borehole in an earth formation A method of creating a borehole in an earth formation is provided. The method involves the steps of drilling a section of the borehole and lowering an expandable tubular element into the borehole whereby a lower portion of the tubular element extends into the drille... | 06/16/2009 |
| 7540338 | Single joint drilling system with inclined pipe handling system A pipe handling system comprises a pipe erector that is operable to move a pipe from a horizontal storage position to an inclined position. In the inclined position, an upper end of the pipe is adjacent to an elevated drill floor of a drilling rig and the pipe is at... | 06/02/2009 |
| 7520341 | Drill head assembly A drill housing rotatably supports a shaft having an internal cavity for receiving a drilling device, such as a drill steel, bolt driver, and rock anchor adaptor. The upper end of the housing is closed by a cover plate and a flinger having an opening for receiving p... | 04/21/2009 |
| 7520340 | Method of avoiding the need for a scraper run in drill out operations and a downhole drilling motor assembly A method of avoiding the need for a scraper run in drill out operations. The method involves the single step of incorporating a rotary scraper into the downhole drilling motor assembly in such a manner that the rotary scraper rotates with the drill bit and follows t... | 04/21/2009 |
| 7506697 | Recoil auger with clutch bearing A recoil auger enables holes to be drilled by using only straight line motions of a person's hand, arm, and shoulder. The recoil auger is comprised of a recoil drive system connected to an output shaft, which in turn is connected to an auger. The recoil drive system... | 03/24/2009 |
| 7506698 | Cutting elements and bits incorporating the same Cutting elements and bits incorporating such cutting elements are provided. The cutting elements have a substrate, a first ultra hard material layer formed over the substrate, and a second ultra hard material layer formed over the first ultra hard material layer. Th... | 03/24/2009 |
| 7503404 | Methods of well stimulation during drilling operations Present embodiments may include methods of stimulating a section of a subterranean formation comprising (a) forming at least a portion of a well bore that at least penetrates a section of the subterranean formation using a drilling operation; (b) stimulating a secti... | 03/17/2009 |
| 7493967 | Tractor with improved valve system A hydraulically powered tractor adapted for advancement through a borehole including an elongate body, aft and forward gripper assemblies, and a valve control assembly housed within the elongate body. The aft and forward gripper assemblies are adapted for selective ... | 02/24/2009 |
| 7484572 | Roller cone drill bit with debris flow paths through associated support arms A roller cone drill bit having a bit body with at least one support arm extending therefrom. Each support arm may have an interior surface and an exterior surface with an associated spindle extending inwardly from the interior surface. A respective cone assembly may... | 02/03/2009 |
| 7481280 | Method and apparatus for conducting earth borehole operations using coiled casing A method and apparatus for conducting earth borehole operations include a reel (28) of continuous coiled casing (30), and an injector (20) for moving the coiled casing. The bottomhole assembly including at least a motor (54) and a bit ( | 01/27/2009 |
| 7478687 | Coiled tubing conveyed milling Milling in casing that is over 4½ inches is done with coiled tubing that is anchored against torque reaction. An improved debris catcher is part of the bottom hole assembly to capture cuttings from the milling. A thruster can be used to maintain weight on the mill ... | 01/20/2009 |
| 7478686 | One trip well drilling to total depth Drilling a well to total depth without tripping the bit out of the hole despite encountering a troublesome zone is made possible by using a memory based composite material delivered with the drill pipe or advanced over it, as needed. The material can be activated as... | 01/20/2009 |
| 7467671 | Drill bit with protection member A method is provided for removing a body of selected material from the interior of a casing extending into a borehole formed in an earth formation. The method comprises lowering a drill bit for further drilling of the borehole, into the casing, the drill bit having ... | 12/23/2008 |
| 7464773 | Enhanced drill bit lubrication apparatus and method A lubricating nutating single cone drill bit 10 includes bit shank 12 with an axially skewed journal 18 rotatably retaining cutter body 22. Bearings (26, 28, 30, 32) enable rotation of the cutter body 22. Lubrication flows t... | 12/16/2008 |