Method of protecting a top drive drilling assembly and a top...

Details Method of protecting a top drive drilling assembly and a top... Method of protecting a top drive drilling assembly and a top...

E - Fixed Constructions

21

B

E21B 17/07 (2006.01) E21B 3/02 (2006.01)

Patent

CA 2663348

A method of protecting a top drive drilling assembly includes incorporating a shock absorbing sub incorporated in the top drive drilling assembly. The shock absorbing sub comprises a first body and a second body capable of relative axial movement, with a shock absorbing medium disposed between the first body and the second body to absorb any reactive axial force exerted upon the top drive drilling assembly.

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