Directional drilling using a rotating housing and a selectively offsetable drive shaft
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United States of America Patent
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May 1, 2018
Issued Date -
N/A
app pub date -
Dec 19, 2012
filing date -
Dec 19, 2012
priority date (Note) -
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Abstract
Example systems described herein may include a housing 201 and an offsetable drive shaft 202 coupled to a drill bit 203 and at least partially disposed within the housing 201. The offset angle of the offsetable drive shaft 202 may determine an angle of the drill bit face. A motor 204 may be coupled to the housing 201 that, when activated, independently rotates the housing 201. By independently counter-rotating the housing 201 relative to a drill string during drilling operations, the angular orientation of the offsetable drive shaft 202 and drill bit 203 may remain geo-stationary with respect to the surrounding formation, without requiring that the housing 201 engage a borehole wall.
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