Drilling apparatus and method

Details Drilling apparatus and method Drilling apparatus and method

E - Fixed Constructions

21

B

E21B 7/04 (2006.01) E21B 7/06 (2006.01)

Patent

CA 2130736

Abstract TITLE: DRILLING APPARATUS AND METHOD Drilling apparatus comprises a drill string having coiled tubing (10) which extends down a bore being drilled and which is uncoiled as drilling progresses. A leading end of the drill string carries a drilling motor (28) having a body (26) and a bit (32) rotatably driven with respect to the body (26). The bit (32) and the body (26) are out of alignment by a bend angle (38). A multi-plate brake (42) activated by a piston (44) controls relative rotation between the motor body (26) and the coiled tubing (10) in order to control drilling course.

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