Geoffrey C Downton

7845430, Dec 7, 2010

Aug 13, 2008

12/191172

Ashley Bernard Johnson - Milton, GB
Geoffrey C. Downton - Sugar Land TX, US
John M. Cook - Cambridge, GB

Schlumberger Technology Corporation - Cambridge MA

E21B 17/10

175 57, 175334, 175384

A drill bit system for a drilling assembly is disclosed. The drill bit system may include a chassis, a head, and a first plurality of gauge pads. The head may include a first plurality of cutters coupled with an end of the head, and the head may be movably coupled with chassis. The first plurality of gauge pads may include a second plurality of cutters, and the first plurality of gauge pads may be fixedly coupled with the chassis.

7849939, Dec 14, 2010

Aug 7, 2008

12/187948

Geoffrey C. Downton - Sugar Land TX, US
Richard Harmer - Surrey, GB

Schlumberger Technology Corporation - Sugar Land TX

E21B 15/04
E21B 17/10

175408, 175 73

The present invention recites a drill bit comprising a main body having an axis about which it is rotated in use, a cutting face, a connecting means for attaching the bit to a source of rotary motion, a gauge region intermediate said cutting face and the connecting means. Additionally the gauge region comprises at least one member movable between a first position in which the gauge region is bounded by an imaginary tubular surface of constant cross-section co-axial to the axis of rotation and a second position in which a portion of the member is located radially inwards, with respect to the axis of rotation, of its position when said member is in said first position. In accordance with the present invention, the gauge region whilst said member is in said second position being bound by an imaginary three dimensional conical sectional surface; and at least one actuator.

7971661, Jul 5, 2011

Aug 13, 2008

12/191204

Ashley Bernard Johnson - Milton, GB
Geoffrey C. Downton - Sugar Land TX, US
John M. Cook - Cambridge, GB

Schlumberger Technology Corporation - Cambridge MA

E21B 17/10

175408, 175 73

The drill bit system may include a chassis, a head, and a first plurality of gauge pads. The chassis may be configured to be operably coupled with a first rotational motion source. The head may include a first plurality of cutters coupled with an end of the head, and the head may be rotatably coupled with chassis. The head may be configured to be operably coupled with a second rotational motion source. The first plurality of gauge pads may include a second plurality of cutters, and the first plurality of gauge pads may be fixedly coupled with the chassis.

20090194334, Aug 6, 2009

Feb 13, 2009

12/370903

Ashley Johnson - Cambridgeshire, GB
Walter David Aldred - Hertfordshire, GB
Geoffrey Downton - Sugar Land TX, US
Riadh Boualleg - Cambridge, GB
Kjell Haugvaldstad - Vanvikan, NO
Michael Sheppard - Cambridgeshire, GB

Schlumberger Technology Corporation - Cambridge MA

E21B 7/08
E21B 7/04
E21B 7/06

175 61, 175 76

This disclosure relates in general to a method and system for controlling a drilling system for drilling a borehole in an earth formation. More specifically, but not by way of limitation, embodiments of the present invention provide systems and methods for controlling dynamic interactions between the drilling system for drilling the borehole and an inner surface of the borehole being drilled to steer the drilling system to directionally drill the borehole. In another embodiment of the present invention, data regarding the functioning of the drilling system as it drills the borehole may be sensed and interactions between the drilling system for drilling the borehole and an inner surface of the borehole may be controlled in response to the sensed data to control the drilling system as the borehole is being drilled.

20100038141, Feb 18, 2010

Aug 13, 2008

12/191230

Ashley Bernard Johnson - Cambridge, GB
Geoffrey C. Downton - Sugar Land TX, US
John M. Cook - Cambridge, GB

Schlumberger Technology Corporation - Cambridge MA

E21B 7/00
E21B 17/10

175 57, 175408

A drill bit system for a drilling assembly is disclosed. The drill bit system may include a chassis, a head, and one or more gauge pads. The head may include a first plurality of cutters coupled with an end of the head, and the head may be coupled with chassis. The one or more gauge pads may include a second plurality of cutters, and the one or more gauge pads may be movably coupled with the chassis.

20110120725, May 26, 2011

May 28, 2009

12/996660

Geoffrey C. Downton - Sugar Land TX, US
Iain Cooper - Sugar Land TX, US
Mike Williams - Sugar Land TX, US
Robert Utter - Sugar Land TX, US

E21B 34/06
E21B 4/00
E21B 10/00
E21B 7/04
E21B 7/00
H02K 49/10

166373, 175293, 175328, 175 61, 175 57, 310103

A directional drilling system, a drilling hammer and a fluid flow telemetry modulator use a plurality of magnets arranged to convert rotational motion into reciprocating linear motion. Various types of motor can provide rotational motion to a part of the magnets and various linkages and other devices can cause steering or operation of a modulator valve. A torsional drilling hammer uses a plurality of magnets arranged to convert reciprocating linear motion into reciprocating rotational motion. A motor and linkage drives the linearly moving part of the magnets, and the rotating part provides torsional impact be striking the linearly moving part of the magnets.

20120018224, Jan 26, 2012

Jul 5, 2011

13/176656

Ashley Bernard Johnson - Cambridge, GB
Geoffrey C. Downton - Sugar Land TX, US
John M. Cook - Cambridge, GB

Schlumberger Technology Corporation - Cambridge MA

E21B 7/04
E21B 10/36

175 61, 175428

A drill bit system for a drilling assembly is disclosed. The drill bit system may include a chassis, a head, and one or more compliantly coupled gauge pads. The head may include a first plurality of cutters coupled with an end of the head, and the head may be coupled with chassis. The one or more gauge pads may include a second plurality of cutters, and the one or more gauge pads may be movably coupled with the chassis.

20090188720, Jul 30, 2009

Feb 13, 2009

12/370890

Ashley Johnson - Cambridgeshire, GB
Walter David Aldred - Hertfordshire, GB
Geoffrey Downton - Sugarland TX, US
Riadh Boualleg - Cambridge, GB
Kjell Haugvaldstad - Vanvikan, NO
Michael Sheppard - Cambridgeshire, GB

Schlumberger Technology Corporation - Cambridge MA

E21B 7/08
E21B 7/04
E21B 7/06

175 61, 175 76

This disclosure relates in general to a method and system for controlling a drilling system for drilling a borehole in an earth formation. More specifically, but not by way of limitation, embodiments of the present invention provide systems and methods for controlling dynamic interactions between the drilling system for drilling the borehole and an inner surface of the borehole being drilled to steer the drilling system to directionally drill the borehole. In another embodiment of the present invention, data regarding the functioning of the drilling system as it drills the borehole may be sensed and interactions between the drilling system for drilling the borehole and an inner surface of the borehole may be controlled in response to the sensed data to control the drilling system as the borehole is being drilled.