Drilling rig

Details Drilling rig Drilling rig

E - Fixed Constructions

21

B

255/30

E21B 15/00 (2006.01) E21B 3/02 (2006.01) E21B 3/04 (2006.01)

Patent

CA 1335732

The present invention discloses means to construct or convert drilling rigs in which the rotary table and kelly are replaced by a top drive rotating mechanism. Further means is provided to restrain the reactionary rotational forces induced by the top drive without applying such additional forces to the structure of the mast.

590410

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