Rotary steerable devices and methods of use
AssigneeSchlumberger Technology Corporation
InventorsJohn Hallworth, Steve Hart, Kjell Haugvaldstad, Laurent Allias, Bertrand Lacour, Riadh Boualleg
Life of this patent
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Abstract
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.
Claims20
A rotary steerable device comprising:
- 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 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.
A rotary steerable device comprising:
- a cylinder configured for rotation in a wellbore, the cylinder having a slot;
- and
- a plurality of cams received in the slot, each cam configured for selective actuation between a first position, wherein at least one of the cams lies within a gauge of the cylinder, and a second position, wherein at least one of the cams is displaced out of a gauge of the cylinder.
A method of steering a bottom hole assembly comprising:
- providing a bottom hole assembly comprising:
- a cylinder configured for rotation in a wellbore, the cylinder having a slot;
- and
- at least one cam received in the slot, the cam configured for selective actuation from a first position, wherein the cam lies within a gauge of the cylinder, and a second position, wherein the cam is displaced out of a guage of the cylinder;
- rotating the cylinder;
- and
- selectively actuating the cam to steer the bottom hole assembly.
A wellsite system comprising:
- a drill string;
- a kelly coupled to the drill string;
- a rotary steerable device coupled to the drill string, the rotary steerable device comprising:
- 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 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;
- and
- a drill bit coupled to the drill string.
Dependencies are inferred from the claim text.