Continuous circulation drilling method

Details Continuous circulation drilling method Continuous circulation drilling method

E - Fixed Constructions

21

B

E21B 19/16 (2006.01) E21B 21/00 (2006.01) E21B 21/02 (2006.01)

Patent

CA 2550981

Apparatus for connecting or disconnecting tubular to and from a drill string while continuously rotating the drill string in a bore hole comprising: (a) first means for positioning a tubular above a drill string in axial alignment; (b) rotary grip means for gripping the drill string; and (c) motorized means connected to the rotary grip means for rotating the drill string relative to the tubular and continuously rotating the drill string in the bore hole while simultaneously connecting or disconnecting the tubular to and from the drill string.

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