Dual motor systems and non-rotating sensors for use in developing wellbores in subsurface formations
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United States of America Patent
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Apr 10, 2012
Grant Date -
Nov 5, 2009
app pub date -
Apr 10, 2009
filing date -
Apr 18, 2008
priority date (Note) -
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Abstract
A method for forming a subsurface wellbore is disclosed. The method includes operating a drilling string in a first direction of rotation. A first motor located near the end of the drilling string is operated in a direction of rotation opposite that of the drilling string. A drill bit is rotated using a second motor that is coupled to the first motor.
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