Directional drilling control apparatus and methods
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United States of America Patent
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Jan 29, 2013
Grant Date -
Feb 3, 2011
app pub date -
Oct 15, 2010
filing date -
Sep 21, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Methods and apparatus for using a quill to steer a hydraulic motor when elongating a wellbore in a direction having a horizontal component, wherein the quill and the hydraulic motor are coupled to opposing ends of a drill string, by monitoring an actual toolface orientation of a tool driven by the hydraulic motor via monitoring a drilling operation parameter indicative of a difference between the actual toolface orientation and a desired toolface orientation, and then adjusting a position of the quill by an amount that is dependent upon the monitored drilling operation parameter.
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