Steering system for drill string
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United States of America Patent
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Jan 16, 2018
Issued Date -
N/A
app pub date -
May 11, 2015
filing date -
Jul 7, 2014
priority date (Note) -
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Abstract
A technique facilitates directional drilling of boreholes. A steerable system has a plurality of actuator pistons slidably mounted in a mechanical structure. The mechanical structure comprises a radially inward portion containing ports to deliver a portion of drilling mud to the plurality of actuator pistons. The mechanical structure also has a radially outward portion positioned to define a main flow passage extending longitudinally through the steerable system between the radially inward portion and the radially outward portion of the mechanical structure.
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