Title:
SYTEM AND METHOD FOR DAMPING VIBRATION IN A DRILL STRING
Document Type and Number:
WIPO Patent Application WO2005047640
Kind Code:
A3
Abstract:
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.
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Inventors:
WASSELL MARK ELLSWORTH (US)
TURNER WILLIAM EVANS (US)
BURGESS DANIEL E (US)
PERRY CARL ALLISON (US)
TURNER WILLIAM EVANS (US)
BURGESS DANIEL E (US)
PERRY CARL ALLISON (US)
Application Number:
PCT/US2004/037290
Publication Date:
December 29, 2005
Filing Date:
November 08, 2004
Export Citation:
Assignee:
APS TECHNOLOGY INC (US)
WASSELL MARK ELLSWORTH (US)
TURNER WILLIAM EVANS (US)
BURGESS DANIEL E (US)
PERRY CARL ALLISON (US)
WASSELL MARK ELLSWORTH (US)
TURNER WILLIAM EVANS (US)
BURGESS DANIEL E (US)
PERRY CARL ALLISON (US)
International Classes:
E21B17/07; E21B17/20; E21B44/00; E21B; (IPC1-7): E21B17/20; E21B44/00
Foreign References:
| US6568470B2 | 2003-05-27 | |||
| US4427079A | 1984-01-24 | |||
| US4133516A | 1979-01-09 | |||
| US6378558B1 | 2002-04-30 |
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