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| Number | Title | Issue Date |
| 7963347 | Systems and methods for reducing backward whirling while drilling According to the invention, a system for drilling a cavity in a medium is disclosed. The system may include a bottom hole assembly. The bottom hole assembly may include a first longitudinal segment and at least one drill bit. The first longitudinal segment may inclu... | 06/21/2011 |
| 7413033 | Directional drill head A drill head is shown that provides improved steering in difficult ground conditions such as dry and compacted soil. A drill head is shown with features that include a narrow front portion, a sharp hardened insert such as a carbide point, and a curved rear portion o... | 08/19/2008 |
| 7293617 | Polycrystaline diamond compact insert reaming tool A reaming tool including a body adapted to couple to a drill string at both axial ends thereof, the body including a plurality of reaming blades affixed at azimuthally spaced apart locations around the circumference of the body, wherein selected ones of the pluralit... | 11/13/2007 |
| 7278478 | Tubing string anchoring tool An anchoring tool anchors a tubing string within a surrounding well casing against rotation in either clockwise or counter clockwise directions. The tool includes a tubular housing for connection in line with the tubing string. A fixed jaw is fixedly mounted on the ... | 10/09/2007 |
| 7270198 | Orienter for drilling tool assembly and method The disclosed orienter for use in drilling a subterranean borehole enables use of the torque provided by the drilling motor to both orient the rotating drill bit for drilling an arcuate section of the borehole and rotating the orienter housing, including a fixed ben... | 09/18/2007 |
| 7243739 | Coiled tubing directional drilling apparatus A coiled tubing directional drilling apparatus which is operated by a mud motor and is characterized by a fixed housing and a rotary steerable bent housing or sub which is selectively rotatable with respect to the fixed housing at a fixed angle bend by a shifting me... | 07/17/2007 |
| 7225887 | Method of drilling an ultra-short radius borehole A method of drilling a borehole into an earth formation using a drill string having an upper part and a lower part which is more flexible than the upper part, the method involving drilling a first section of the borehole, drilling a second section of the borehole fr... | 06/05/2007 |
| 7225879 | Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell An assembly and methods for constructing a MONOWELL includes a monodiameter casing disposed in a monodiameter wellbore having diametric efficiency with a monobore production delivery system disposed within the monodiameter casing. An assembly for constructing a mono... | 06/05/2007 |
| 7216724 | Coupling for dual member pipe A coupling assembly to interconnect an inner member and an outer member of a dual member drill string in torque transmitting engagement is disclosed. The coupling assembly is adapted to transmit torque input from both members to a downhole tool. In one embodiment, t... | 05/15/2007 |
| 7207398 | Steerable rotary drill bit assembly with pilot bit A rotary drill bit assembly suitable for directionally drilling a borehole into an underground formation, the drill bit assembly having a bit body extending along a central longitudinal bit-body axis, and having a bit-body face at its front end, wherein an annular p... | 04/24/2007 |
| 7191877 | Fluid flow regulation of a vehicle shock absorber/damper Shock absorber components, such as a radial bypass damper, an anti-cavitation valve (ACV) and an incremental flow metering valve IFMV. The damper is of a continuous, unitary construction with a main hole and auxiliary holes interconnected by passageways. The ACV has... | 03/20/2007 |
| 7178611 | System and method for directional drilling utilizing clutch assembly According to one embodiment of the invention, a system for directional drilling within a wellbore includes a drill string having an upper portion, a lower portion, a bent motor coupled to the lower portion, and a drill bit coupled to bent motor, and a clutch assembl... | 02/20/2007 |
| 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 |
| 7165635 | Deflection swivel and method A deflectable in-line swivel that permits axial deflection of a tubular string is presented. The in-line swivel is preferably constructed as a ball and socket design whereby the ball of a swivel mandrel is permitted to articulate within a socket of a retainer sub. T... | 01/23/2007 |
| 7147066 | Steerable drilling system and method A bottom hole assembly 10 for drilling a deviated borehole includes a positive displacement motor (PDM) 12 or a rotary steerable device (RSD) 110 having a substantially uniform diameter motor housing outer surface without stabilizers extending r... | 12/12/2006 |
| 7137463 | Polycrystaline diamond compact insert reaming tool A reaming tool that includes a body having reaming blades affixed thereto. The reaming blades each have at least one cutter attached thereto at a selected position and orientation. The plurality of reaming blades includes at least one radially most extensive reaming... | 11/21/2006 |
| 7108065 | Technique for preventing deposition products from impeding the motion of a movable component A technique for preventing mineral, mineral salt and other deposits from impeding the motion of movable components in a submerged environment. The technique allows for a movable component in a submerged environment to move freely beneath a deformable member. As the ... | 09/19/2006 |
| 7089847 | Hydraulic cam motor A compressed fluid driven downhole cam motor (1) of the type used during drilling/service operations in the ground, comprising an intermediate casing (4), a distributing valve (26), a rotor (18) and two or more pistons (48) arrange... | 08/15/2006 |
| 7083010 | Apparatus and method for drilling and reaming a borehole A drilling assembly, a reamer, and an adjustable diameter stabilizer are disclosed. The reamer includes cutter elements mounted on at least a first fixed blade for reaming a previously-formed borehole or for forming a borehole of increased diameter beneath an existi... | 08/01/2006 |
| 7059412 | Technique for preventing deposition products from impeding the motion of a movable component A technique for preventing mineral, mineral salt and other deposits from impeding the motion of movable components in a submerged environment. The technique allows for a movable component in a submerged environment to move freely beneath a deformable member. As the ... | 06/13/2006 |
| 7048078 | Expandable underreamer/stabilizer A downhole tool that functions as an underreamer or as a stabilizer in an underreamed borehole. The tool includes one or more moveable arms disposed within a body having a flowbore therethrough in fluid communication with the wellbore annulus. The tool alternates be... | 05/23/2006 |
| 7013994 | Directional drilling apparatus Directional drilling apparatus for use in drilling a deviated bore comprises a mandrel for mounting to a drill string and having a main axis. A non-rotating mass is rotatably mounted on the mandrel and has a center-of-gravity spaced from the mandrel axis. The appara... | 03/21/2006 |
| 6991047 | Wellbore sealing system and method In accordance with one embodiment of the present invention, a method for drilling wellbores includes drilling a main wellbore and disposing a casing string in the main wellbore. The casing string has a deflecting member and a sealing member coupled thereto. The meth... | 01/31/2006 |
| 6978850 | Smart clutch In one embodiment, a directional apparatus is disclosed for orienting and maintaining a desired orientation of a drill bit, which will be attachable to a drill string and include an asymmetrically weighted outer sleeve that is susceptible to the earth's gravity in s... | 12/27/2005 |
| 6923273 | Well system The drilling system includes a work string supporting a bottom hole assembly. The work string including lengths of pipe having a non-metallic portion. The work string preferably includes a composite coiled tubing having a fluid impermeable liner, multiple load carry... | 08/02/2005 |
| 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 |
| 6920944 | Apparatus and method for drilling and reaming a borehole A drilling assembly and an eccentric, adjustable diameter reamer are disclosed. The reamer includes cutter elements mounted on at least a first fixed blade for reaming a previously-formed borehole or for forming a borehole of increased diameter beneath an existing c... | 07/26/2005 |
| 6913098 | Sub-reamer for bi-center type tools An improved bi-center with improved directional stability and wear resistance is disclosed, said bit optimally utilizing a plurality of shaped PDC cutting elements selectively situated about the cutting surfaces of the pilot and the reamer to produce a minimal force... | 07/05/2005 |
| 6913094 | Leading body for ground drilling and ground drilling machine A leading body for a ground drilling machine is provided which includes a main body which is tapered at a front end thereof to form a first sloped surface and a second sloped surface on opposite sides of the front end of the main body. A slant-cutting section extend... | 07/05/2005 |
| 6763900 | Directional well drilling An orienter for controlling the drilling direction in a well. A main body 40, 23 is couplable to a drill string, and a nose tubing 50 is movably mounted by a universal joint in the main body. A collar 42 with a bore 43 engages in a cam-li... | 07/20/2004 |
| 6641634 | Hand-held tool with dust extraction A manual machine tool (10) includes a vacuum device for dust removal (19) situated in its housing (12) and a blow-out connection (20) installed after this. A dust collection box (21), particulaily self-contained, can be attached in detachable fashion to t... | 11/04/2003 |
| 6640910 | Long gauge roller vane drilling motor A system for downhole drilling and coring includes a roller vane motor for driving a drill bit. The motor has a single jacket with a lower end and an upper end and being embodied such that all drilling fluid passes inside the jacket to the drill bit. The ... | 11/04/2003 |
| 6588517 | Boring apparatus Apparatus for boring a hole from an inside of a casing outwardly at an angle relative to a longitudinal axis of the casing comprises a drill shoe having a longitudinal axis and being positionable in the casing, the shoe having first and second passageways... | 07/08/2003 |
| 6550553 | Boring apparatus Apparatus for boring a hole from an inside of a tube outwardly perpendicular to a longitudinal axis of the tube comprises a drill shoe having a longitudinal axis and being positionable in the tube, the shoe having an inlet, an outlet perpendicular to the ... | 04/22/2003 |
| 6516902 | Directional drilling system Disclosed is a device for directional drilling including a drill head mounted on a drill column. A driving device applies an axial driving force to the drill column. A delivery device supplies a wash medium to the drill head through a channel in the drill... | 02/11/2003 |
| 6464022 | Mobile horizontal directional boring apparatus and method for use in boring from existing utility manholes A mobile, horizontal directional boring apparatus and method is provided for boring from an existing utility manhole for the placement of small diameter fiber optic cabling. A mobile platform is located adjacent an existing utility manhole. A boring unit ... | 10/15/2002 |
| 6419020 | Hydraulic drilling method and system for forming radial drain holes in underground oil and gas bearing formations The hydraulic drilling method and system uses a tube bending tool attached at the down hole end of a pipe or stringer to direct a fluid tube in a generally horizontal direction from a generally vertical gas or oil well. The bending tool is attached to a c... | 07/16/2002 |
| 6412578 | Boring apparatus Apparatus for boring a hole from an inside of a casing outwardly at an angle relative to a longitudinal axis of the casing comprises a drill shoe having a longitudinal axis and being positionable in the casing, the shoe having first and second passageways... | 07/02/2002 |
| 6378629 | Boring apparatus Apparatus for boring a hole from an inside of a tube outwardly perpendicular to a longitudinal axis of the tube comprises a drill shoe having a longitudinal axis and being positionable in the tube, the shoe having an inlet, an outlet perpendicular to the ... | 04/30/2002 |
| 6308789 | Drill bit for directional drilling A drill bit that is arranged to change the direction of drilling. A cone head is rotatably mounted on a shank portion extending from an elongate housing. When the housing is rotated, the cone head generates a concave hole. When a change in direction is re... | 10/30/2001 |
