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US 8,408,333 B2Granted
Steer systems for coiled tubing drilling and method of use
AssigneeSchlumberger Technology Corporation
InventorsSatish Pai, Keith Moriarty, Geoff Downton, Warren Zemlak, Devin Rock, Jonathan Mattick, Denny Adelung
Life of this patent
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Abstract
A technique provides a drilling system and method in which a drilling assembly is delivered downhole on coiled tubing. The drilling assembly comprises a drill bit and a motor to rotate the drill bit for drilling of a borehole. A steerable system is used to steer the drill bit, thereby enabling formation of deviated boreholes.
Claims19
A wellbore drilling system, comprising:
- a coiled tubing;
- a bottom hole assembly delivered downhole on the coiled tubing, the bottom hole assembly comprising a drill bit, a rotary steerable system to steer the drill bit, and a motor to drive the steerable system and the drill bit, wherein the rotary steerable system has data processing capability and further wherein the steerable system in its entirety is fully rotatable with the drill bit and is rotatable at the same rate as the drill bit during drilling of a deviated wellbore section.
A method, comprising:
- arranging a steering system, a drill bit, and a motor on an end of coiled tubing, the steering system positioned between the drill bit and the motor, wherein the steering system comprises at least one sensor and data processing capability;
- and
- delivering the steering system, the drill bit and the motor downhole on the coiled tubing;
- rotating the steering system in its entirety via the motor during drilling of a deviated wellbore section;
- transmitting data received from the sensors and processed by the steering system to a surface system;
- and
- utilizing data processed by the steering system to enable control over the steering system from below the motor.
4 more elements
A system for drilling comprising:
- coiled tubing extendable into a wellbore;
- a drill bit positioned at one end of the coiled tubing for forming the wellbore;
- a rotary steering system connected to the coiled tubing and having data processing capability for steering the drill bit;
- and
- a motor connected to the coiled tubing such that the rotary steering system is positioned between the drill bit and the motor, the motor having an output shaft for rotating the rotary steering system in its entirety and the drill bit during drilling of a deviated wellbore section.
2 more elements
Dependencies are inferred from the claim text.