E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 7/04 (2006.01)
Patent
CA 2570716
A steerable drilling system comprising a drill string carrying a bent housing, the bent housing containing or having associated therewith a drive motor arranged to drive a drive shaft angled to an axis of part of the drill string adjacent the bent housing, and means permitting relative rotation between the drill string and the bent housing.
Downton Geoff
Schlumberger Canada Limited
Smart & Biggar
LandOfFree
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