Shaft alignment

Details Shaft alignment Shaft alignment

E - Fixed Constructions

21

B

E21B 7/06 (2006.01) E21B 17/10 (2006.01) E21B 23/00 (2006.01) E21B 41/00 (2006.01)

Patent

CA 2190798

A rotary shaft assembly including a mechanism by which one part of the shaft rotates about a rotation axis which is controllably deviated from the rotation axis of the other part of the shaft. The angular extent of deviation is controllably varied by mutually rotating adjacent shaft supports about an axis which is at a non-zero angle with respect to both rotation axes. The direction in which the shaft is deviated is controlled by rotating the non-deviated shaft support with respect to a reference shaft support. The assembly includes remote control of direction and deviation. The invention is particularly applicable to drilling of deviated wells. A preferred form of the invention includes a remotely actuated and de-actuated temporary anchoring system for downhole direction sensing and deviation adjustment.

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