Title:
TUBULAR RETRIEVAL
Document Type and Number:
WIPO Patent Application WO/2011/061506
Kind Code:
A3
Abstract:
A tubular retrieval method comprises applying a cyclically varying fluid pressure to the interior of a section of cut bore- lining tubular ( 20 ). The tubular may be casing which it is desired to remove from a bore. A pulling force may also be applied to the tubular.
Inventors:
EDDISON ALAN MARTYN (GB)
Application Number:
PCT/GB2010/002140
Publication Date:
January 12, 2012
Filing Date:
November 19, 2010
Export Citation:
Assignee:
NAT OILWELL VARCO LLP (US)
EDDISON ALAN MARTYN (GB)
EDDISON ALAN MARTYN (GB)
International Classes:
E21B31/03
Foreign References:
| US3213941A | 1965-10-26 | |||
| US5190114A | 1993-03-02 |
Attorney, Agent or Firm:
SHANKS, Andrew (Aurora120 Bothwell Street, Glasgow G2 7JS, GB)
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