Title:
RETRIEVAL METHOD FOR OPPOSED SLIP TYPE PACKERS
Document Type and Number:
WIPO Patent Application WO/2011/075247
Kind Code:
A3
Abstract:
A method is provided which releases and retrieves an opposed slip downhole tool (10) by reducing the compressive forces on the sealing elements (42) prior to unsetting the slip assemblies (20, 60). Further, the method does so without damaging the slip assemblies. The method provides for the retrieval of the entire downhole tool including all of its component parts, requiring but a single trip within the wellbore. When the tool is to be retrieved, the sealing element is disengaged from the casing by relaxing the compression forces on the sealing element. Then the slip assemblies are disengaged from the casing such that the slip assemblies are no longer in gripping engagement with the casing. The tool is then retrieved from the wellbore. The step of disengaging the sealing assembly can be performed by radially contracting the sealing element with or without longitudinally expanding the sealing element.
Inventors:
KILGORE MARION DEWEY (US)
Application Number:
PCT/US2010/056361
Publication Date:
November 17, 2011
Filing Date:
November 11, 2010
Export Citation:
Assignee:
HALLIBURTON ENERGY SERV INC (US)
KILGORE MARION DEWEY (US)
KILGORE MARION DEWEY (US)
International Classes:
E21B33/129; E21B33/128; E21B33/1295
Foreign References:
| EP1030031A1 | 2000-08-23 | |||
| US5046557A | 1991-09-10 | |||
| US4457369A | 1984-07-03 |
Attorney, Agent or Firm:
SCHROEDER, Peter (LLC1601 Elm Street, Suite 195, Dallas Texas, US)
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