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| Number | Title | Issue Date |
| 8186458 | Expandable window milling bit and methods of milling a window in casing A method of milling a window through a casing in a primary well bore and drilling an enlarged sidetracked well bore comprises running into the primary well bore a drilling assembly comprising at least one cutting apparatus adapted to drill an enlarged borehole, mill... | 05/29/2012 |
| 8146685 | Methods and apparatus for drilling, completing and configuring U-tube boreholes A borehole network including first and second end surface locations and at least one intermediate surface location interconnected by a subterranean path, and a method for connecting a subterranean path between a first borehole including a directional section and a s... | 04/03/2012 |
| 8141657 | Steerable rotary directional drilling tool for drilling boreholes The present invention provides a directional drilling apparatus and method for use in drilling bore holes. The apparatus comprises a plurality of movably mounted cutting elements, wherein the cutting elements are movable between radially retracted and extended cutti... | 03/27/2012 |
| 8141658 | Tilted drive sub A tilted drive sub is disclosed with a center line of the internal diameter (ID) offset at an angle from the center line of the outer diameter (OD) starting at a point near to a top end of the tilted drive sub. This results in the ID being at an angle to the OD, wit... | 03/27/2012 |
| 8122977 | Cutting device with multiple cutting structures A cutting device for downhole operations includes a first cutting structure, and a second cutting structure, wherein at least the second cutting structure is selectively presentable for operation. A method of performing a downhole cutting operation comprises running... | 02/28/2012 |
| 8074743 | Active integrated well completion method and system A well system may be provided comprising a first primary inductive coupler configured to be communicably coupled to a surface device and a first secondary inductive coupler. The first secondary inductive coupler may be further configured to be communicably coupled t... | 12/13/2011 |
| 8066085 | Stochastic bit noise control A drill bit direction system and method is disclosed that modifies or biases the stochastic movement of the drill bit and/or stochastic interactions between the drill bit and an inner-wall of a borehole being drilled by a drilling system to change the direction of d... | 11/29/2011 |
| 8056649 | Apparatus and methods for drilling wellbores that utilize a detachable reamer An apparatus for use in a wellbore is provided that in one aspect includes: a drilling assembly configured to carry a first drill bit at an end thereof, a second drill bit disposed uphole of the first drill bit, and a connection device that is configured to selectiv... | 11/15/2011 |
| 8011451 | Ranging methods for developing wellbores in subsurface formations A method for forming two or more wellbores in a subsurface formation includes forming a first wellbore in the formation. A second wellbore is directionally drilled in a selected relationship relative to the first wellbore. At least one magnetic field is provided in ... | 09/06/2011 |
| 7987927 | Steering of bent housing mud motor downhole rotation device A steerable drilling system includes a drill string carrying a bent housing, the bent housing containing or having associated therewith a drive motor arranged to drive a drive shaft angled to an axis of part of the drill string adjacent the bent housing, and an orie... | 08/02/2011 |
| 7980328 | Rotary steerable devices and methods of use The invention provides rotary steerable devices and methods for use of rotary steerable devices. One aspect of the invention provides a rotary steerable device including: a cylinder configured for rotation in a wellbore, the cylinder having a slot and a gauge; and a... | 07/19/2011 |
| 7946360 | Downhole drilling of a lateral hole A system for drilling a lateral hole departing from a main well. The system comprises a motor assembly (415) including a motor (412) to generate a rotating torque, an axial thruster (411) to generate an axial force, a blocking system (410... | 05/24/2011 |
| 7946361 | Flow operated orienter and method of directional drilling using the flow operated orienter A bottom hole assembly (BHA) for use in drilling a wellbore includes: a first mud motor having a stator and a rotor; a second mud motor having a stator and a rotor; a drill bit rotationally coupled to the second rotor and having a tool face and a longitudinal axis i... | 05/24/2011 |
| 7942214 | Steerable drilling system A steerable drilling system comprises a rotary drill bit 14 secured to a housing 16, a secondary rotary drill component 22 carried by the housing and rotatable therewith, the second rotary drill component 22 having a gauge dimension great... | 05/17/2011 |
| 7942213 | Using hydrostatic bearings for downhole applications Hydrostatic bearings are used for drill string stabilization and bottom hole assembly steering. The hydrostatic bearings utilize an existing mud flow as the bearing fluid. For steering, the bearings may be used between movable kick pads and the formation to reduce f... | 05/17/2011 |
| 7931098 | Steerable bit system assembly and methods A drilling system includes a steerable bottomhole assembly (BHA) having a steering unit and a control unit that provide dynamic control of drill bit orientation or tilt. Exemplary steering units can adjust bit orientation at a rate that approaches or exceeds the rot... | 04/26/2011 |
| 7909117 | Downhole adjustable bent-angle mechanism for use with a motor for directional drilling A housing including longitudinally extending tubular members interconnected to allow controlled relative bending thereof, during a drilling operation, a rotary drive transmitting torsion bar extending generally longitudinally within the housing to controllably bend ... | 03/22/2011 |
| 7896107 | System for tracking and maintaining on on-grade horizontal borehole A tracking receiver system is used to track the progress of a downhole tool along a subsurface path having a desired grade. The tracking receiver system is adapted to detect a reference line originating from a reference line receiver and to determine the position of... | 03/01/2011 |
| 7878270 | Methods and apparatus for drilling, completing and configuring U-tube boreholes A borehole network including first and second end surface locations and at least one intermediate surface location interconnected by a subterranean path, and a method for connecting a subterranean path between a first borehole including a directional section and a s... | 02/01/2011 |
| 7866414 | Active integrated well completion method and system A well system may be provided comprising a first primary inductive coupler configured to be communicably coupled to a surface device and a first secondary inductive coupler. The first secondary inductive coupler may be further configured to be communicably coupled t... | 01/11/2011 |
| 7866413 | Methods for designing and fabricating earth-boring rotary drill bits having predictable walk characteristics and drill bits configured to exhibit predicted walk characteristics Walk characteristics of an earth-boring rotary drill bit may be predicted by measuring locations and orientations of cutting elements thereof and calculating the magnitude and direction of an imbalance force of the drill bit using the measurements obtained. The calc... | 01/11/2011 |
| 7854276 | Methods, systems, and apparatus for production of hydrocarbons from a subterranean formation Methods, systems, and apparatus that are suitable for use in production of hydrocarbons from subterranean heavy oil deposits employ a subterranean cavity in communication with a borehole. The cavity is preferably formed along a U-tube borehole by coiled tubing reami... | 12/21/2010 |
| 7849935 | System and method for drilling wellbores A system and method are provided for drilling a wellbore. The wellbore is formed with a drilling tool that cuts through a formation. A pumping system removes cuttings from the drilling tool and also transports the cuttings along at least a portion of the wellbore fo... | 12/14/2010 |
| 7849936 | Steerable rotary directional drilling tool for drilling boreholes A directional drilling apparatus for use in the directional drilling of bore holes is disclosed. The apparatus comprises a plurality of cutting elements movably mounted with respect to a rotatable body member, wherein the cutting elements are movable between first, ... | 12/14/2010 |
| 7832502 | Methods and apparatus for drilling directional wells by percussion method The present invention generally relates to methods and apparatus for impact drilling. A drilling tool with a housing and a piston is provided. The drilling tool may be configured to impact while simultaneously rotating a drill head, independent from the rotation of ... | 11/16/2010 |
| 7823661 | In-drilling alignment To limit the growth of errors of an inertial navigation system for measurement-while-drilling, in-drilling alignment methods can be used. A pneumatics-based design of an apparatus for an in-drilling alignment method and its implementation downhole are described.... | 11/02/2010 |
| 7823660 | Apparatus and methods for drilling a wellbore using casing Apparatus and methods for drilling with casing. In an embodiment, methods and apparatus for deflecting casing using a diverter apparatus are disclosed. In another embodiment, the apparatus comprises a motor operating system disposed in a motor system housing, a shaf... | 11/02/2010 |
| 7810584 | Method of directional drilling with steerable drilling motor Drilling a bore hole comprises rotary drilling at a first rotation rate until a first target value is substantially met, changing the first rotation rate to a second rotation rate when a trigger is substantially met, and then drilling at the second rotation rate unt... | 10/12/2010 |
| 7802637 | Steerable bit system assembly and methods A drilling system includes a steerable bottomhole assembly (BHA) having a steering unit and a control unit that provide dynamic control of drill bit orientation or tilt. Exemplary steering units can adjust bit orientation at a rate that approaches or exceeds the rot... | 09/28/2010 |
| 7779933 | Apparatus and method for steering a drill bit Steerable drilling systems for facilitating drilling according to a prescribed, three-dimensional trajectory are described. Steering may be achieved using passive actuators which require little or no power. For example, damping elements which couple a drill bit to a... | 08/24/2010 |
| 7775301 | Advanced steering tool system, method and apparatus A steering tool is movable by a drill string to form an underground bore along an intended path. A sensing arrangement of the steering tool detects its pitch and yaw orientations at a series of spaced apart positions along the bore, each position is characterized by... | 08/17/2010 |
| 7766098 | Directional drilling control using modulated bit rotation A system for steering the direction of a borehole advanced by cutting action of a rotary drill bit by periodically varying the rotation speed of the drill bit. The steering system comprises a motor disposed in a bent housing subsection and operationally connected to... | 08/03/2010 |
| 7762356 | Rotary steerable motor system for underground drilling A preferred embodiment of a system for rotating and guiding a drill bit in an underground bore includes a drilling motor and a drive shaft coupled to drilling motor so that drill bit can be rotated by the drilling motor. The system further includes a guidance module... | 07/27/2010 |
| 7753139 | Cutting device with multiple cutting structures A cutting device for downhole operations comprises a first cutting structure, and a second cutting structure, wherein at least the second cutting structure is selectively presentable for operation. A method of performing a downhole cutting operation comprises runnin... | 07/13/2010 |
| 7730972 | Downhole turbine In one aspect of the present invention, a drill bit has a jack element that is substantially coaxial with an axis of rotation of the drill bit and the jack element has an asymmetrical distal end that extends beyond a working face of the drill bit. A turbine is locat... | 06/08/2010 |
| 7703549 | Method and apparatus for removing cuttings in high-angle wells A method of removing cuttings includes the steps of disposing a pipe string in a high-angle wellbore, circulating mud through the wellbore and creating a viscous coupling layer of mud spiraling about a section of the pipe string. Wherein the wellbore may be deviated... | 04/27/2010 |
| 7690443 | Apparatus, system, and method for casing hole formation in radial drilling operations The present application is directed to an apparatus for forming one or more holes in a wellbore casing, the apparatus comprising a deflector assembly and a drive assembly to drive said deflector assembly, wherein the deflector assembly may be optionally assembled at... | 04/06/2010 |
| 7677335 | Tools and technology of radical and level drilling/well completion under ultra-short radius A system of components and a method is provided for radial and level drilling and completion with an ultra-short radius which includes a deflecting drill tool assembly and a level drill tool assembly. The deflecting drill tool has a deflecting rotary assembly, flexi... | 03/16/2010 |
| 7669670 | Procedure for installing horizontal drains for uptake of sea water A procedure for the installation of horizontal drains for uptake of seawater of the type of those that use horizontal directional drilling (HDD) with widening by means of reamers and use of drilling muds for consolidation of the drilled galleries, and subsequent ins... | 03/02/2010 |
| 7654343 | Deviated drilling method for water production Method for drilling horizontal or deviated fresh water wells through such volcanics as occur in Hawaii, including hard lavas and fragmented interbeds that are prone to caving. The method provides effective means to drill into basal aquifers directly underlain by sal... | 02/02/2010 |
