Drill string shock absorber

Details Drill string shock absorber Drill string shock absorber

E - Fixed Constructions

21

B

E21B 17/07 (2006.01) E21B 17/10 (2006.01)

Patent

CA 2120788

The invention concerns a shock absorber for use with a borehole drill string and which is to take rotational load and absorb axial shock loading, the absorber consisting essentially of a pair of oppositely disposed components adapted for connection into a drill string and positioned on opposite sides of a resilient member the latter held between rigid rings around and separate from the components each ring secured to the component on the opposite side of the member.

Cette invention concerne un amortisseur de choc pour train de tiges de forage conçu pour transmettre l'effort de rotation et absorber les chocs axiaux, ledit amortisseur étant composé essentiellement d'une paire d'éléments opposés adaptés pour interposés dans un train de tiges de part et d'autre d'un élément élastique maintenu entre anneaux rigides distincts desdits éléments et les entourant, chaque anneau étant solidaire de l'élément situé du côté opposé de l'élément élastique.

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