Schlumberger Technology Corporation

Bertrand Lacour

Geoffrey Charles Downton

Kjell Haugvaldstad

Riadh Boualleg

Christopher C Bogath

Cedric Perrin

Steve Hart

Laurent Allias

Paul Crerar

John Hallworth

A technique facilitates drilling of wellbores or other types of bore holes in a variety of applications. A steerable system or other well tool is designed with a plurality of actuators which are positioned to provide controlled steering during a drilling operation. Each actuator includes at least one loose element or ball slidably mounted in a corresponding sleeve. Pressurized fluid is used to provide controlled movement of the elements along the corresponding sleeves of the actuators. The controlled movement of the elements assists in the provision of steering or other control over the well tool during the drilling operation.

Directional drilling system

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 at least one cam received in the slot. The cam is configured for selective actuation between a first position, wherein the cam lies within the gauge of the cylinder, and a second position, wherein the cam is displaced out of the gauge of the cylinder.

Rotary steerable devices and methods of use

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Cambridge, United Kingdom

Bertrand Lacour