Drill head steering
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United States of America Patent
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-
Mar 27, 2007
Grant Date -
Jan 5, 2006
app pub date -
Oct 20, 2003
filing date -
Oct 18, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A method of steering a fluid drilling head in an underground borehole drilling situation is provided by rotating the flexible hose through which high pressure is provided to the drilling head and providing a biasing force on the drilling head. The hose can be rotated from a remote surface mounted situation by rotating the entire surface rig (13) in a horizontal plane about a turntable (24) causing the vertically orientated portion of the hose (11) to rotate about its longitudinal axis. The biasing force can be provided in a number of different ways but typically results from the use of an asymmetrical gauging ring on the fluid drilling head.
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