System and method for damping vibration in a drill string

Details System and method for damping vibration in a drill string System and method for damping vibration in a drill string

E - Fixed Constructions

21

B

E21B 17/20 (2006.01) E21B 44/00 (2006.01)

Patent

CA 2544832

A system for damping vibration in a drill string can include a valve assembly having a supply of a fluid, a first member, and a second member capable of moving in relation to first member in response to vibration of the drill bit. The first and second members define a first and a second chamber for holding the fluid. Fluid can flow between the first and second chambers in response to the movement of the second member in relation to the first member. The valve assembly can also include a coil or a valve for varying a resistance of the fluid to flow between the first and second chambers.

L'invention décrit un système d'amortissement des vibrations dans un train de tiges. Ce système peut comprendre un assemblage soupape comportant une alimentation de fluide, un premier élément, et un second élément capable de se déplacer par rapport au premier élément en réaction aux vibrations du train de tiges. Les premiers et second éléments comportent des première et seconde chambres pour contenir le fluide. Le fluide peut s'écouler entre les première et seconde chambres en réaction au mouvement du second élément par rapport au premier élément. L'assemblage soupape peut également comporter une bobine ou une soupape qui permet de faire varier la résistance du fluide qui s'écoule entre les première et seconde chambres.

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