Downhole shock absorber

Details Downhole shock absorber Downhole shock absorber

E - Fixed Constructions

21

B

E21B 43/25 (2006.01) E21B 17/07 (2006.01) E21B 43/119 (2006.01) E21B 47/01 (2006.01)

Patent

CA 2314192

A shock absorber for damping shock energy generated by downhole perforating guns or stimulation devices is described. The shock absorber includes a spring assembly including at least a first spring and a second spring, the first spring having a tension greater than the second spring; a damper assembly; and a housing retaining the spring assembly and the damper assembly and including ends adapted for connection into a casing perforation assembly. The provision of springs of increasing stiffness permits the force generated by the perforating gun to be absorbed gradually and smoothly.

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