Title:
HIGH EXPANSION OR DUAL LINK GRIPPER
Document Type and Number:
WIPO Patent Application WO/2013/063317
Kind Code:
A3
Abstract:
A gripper mechanism for a downhole tool is disclosed that includes a linkage mechanism. In operation, an axial force generated by a power section of the gripper expands the linkage mechanism, which applies a radial force to the interior surface of a wellbore or passage. For certain expansion diameters, the expansion force can be primarily transmitted from a roller-ramp interface expanding the linkage. For other expansion diameters, the expansion force can be primarily provided by expansion of the linkage, in which during a first stage the expansion force is primarily provided by a first link and during a second stage the expansion force is primarily provided by a second link. Thus, the gripper can provide a desired expansion force over a large range of expansion diameters.
Inventors:
MITCHELLE SARAH BRIANNE (US)
Application Number:
PCT/US2012/061988
Publication Date:
February 06, 2014
Filing Date:
October 25, 2012
Export Citation:
Assignee:
WWT INTERNATIONAL INC (US)
International Classes:
E21B4/18; E21B23/14
Foreign References:
| US7748476B2 | 2010-07-06 |
Attorney, Agent or Firm:
ALTMAN, Daniel, E. (LLP2040 Main Street, 14th Floo, Irvine CA, US)
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