Drilling system with flow control valve
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United States of America Patent
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Sep 1, 2015
Grant Date -
Jan 16, 2014
app pub date -
Jul 11, 2012
filing date -
Jul 11, 2012
priority date (Note) -
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Abstract
A technique facilitates drilling of wellbores with a steerable system having a plurality of pads which may be selectively actuated in a lateral direction to apply a side force. Application of the side force is used to steer a drill bit. A valve system is positioned to control delivery of actuating fluid under pressure to individual pads in a manner that enables steering of the drill bit. The valve system allows drilling along a desired curve by controlling the flow of actuating fluid under pressure to specific steering pads at specific angular positions. The valve system also allows drilling along a desired trajectory by preventing exposure of the pads to the pressurized actuating fluid.
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