Drill string shock absorber

Details Drill string shock absorber Drill string shock absorber

Category

E - Fixed Constructions

Subcategory

21

Subsubcategory

B

IPC codes

E21B 17/07 (2006.01)

Type

Patent

Patent number

CA 2424194

Description

The invention concerns a shock absorber for a borehole drilling machine to absorb axial and torsional loads having a pair of components for connection to each other in a drill string, each component having a circumferentially extending series of lobes and a plate with inwardly extending lobes between the lobes of the components, a resilient member located between the components and fastening means extending between the plates on one side of the member and the lobes on the component on the other side.

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