Schlumberger Technology Corporation

Services Petroliers Schlumberger

Schlumberger Holdings Limited

Michael Pearce

Edward George Parkin

Julien Steimetz

Jonathan D Marshall

Clint William Philbrick

D Peter Johnson

Junichi Sugiura

Christopher C Bogath

Christian Menger

Oleg Polyntsev

Cedric Perrin

Cecily Millwater

A tool, e.g. a downhole tool, utilizes at least one actuator which may be actuated rapidly between positions during operation of the tool. The actuator is moved via flow of an actuating fluid controlled by a main valve which, in turn, is controlled via a pilot valve. The pilot valve is operated to selectively control flow of the actuating fluid to the main valve so as to shift the main valve between desired operational positions.

Actuation valve system with pilot and main valves

A downhole tool includes a housing and a housing chamber. The housing chamber is separated from a fluid chamber by a seal. The seal maintains a pressure differential between the housing chamber and the fluid chamber. A pressure adjuster between the housing chamber and the fluid chamber maintains the pressure differential below a maximum pressure differential.

Pressure adjuster for a downhole tool

Pilot controlled actuation valve system

Rotary steerable drilling apparatus and methods utilizing apparatus comprising a shaft, a multi-angle strike ring axially repositionable along the shaft, an articulated member coupled to the shaft, and a steering member carried by the articulated member. An actuator is operable to maintain an angular offset of the articulated member relative to the shaft by maintaining azimuthally-dependent contact between the multi-angle strike ring and the steering member.

Multi-angle rotary steerable drilling

A technique facilitates drilling of wellbores or other types of bore holes in a variety of applications. A steerable system is designed with a main shaft coupled to a drill bit shaft by a universal joint to provide steering functionality. A sensor system is mounted on the steerable system and comprises at least one sensor positioned to measure desired parameters, such as weight on bit and/or torque on bit parameters during drilling.

Instrumented drilling system

A technique facilitates the drilling of deviated wellbores. A steerable drilling system is formed with a pair of components pivotably mounted with respect to each other. A removable strike ring is mounted to one of the steerable drilling system components and is positioned to engage a corresponding strike ring in a manner which limits the maximum pivot angle between the steerable drilling system components. By interchanging the removable strike ring with other removable strike rings, the maximum pivot angle can be adjusted in the field to accommodate drilling of a wider variety of deviated wellbores.

Adjustable rotary steerable system

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Cheltenham, United Kingdom

Michael Pearce