Mud flow back valve

Details for Australian Patent Application No. 2004280471 (hide)

Owner Baker Hughes Incorporated

Inventors Misiewicz, Cecilie T.; Henriksen, Knut H.

Agent Freehills

Pub. Number AU-B-2004280471

PCT Pub. Number WO2005/035937

Priority 10/679,232 03.10.03 US

Filing date 27 September 2004

Wipo publication date 21 April 2005

Acceptance publication date 13 May 2010

International Classifications

E21B 34/08 (2006.01) Valve arrangements for boreholes or wells

E21B 34/14 (2006.01) Valve arrangements for boreholes or wells

E21B 43/14 (2006.01) Obtaining fluids from wells

Event Publications

27 April 2006 PCT application entered the National Phase

  PCT publication WO2005/035937 Priority application(s): WO2005/035937

13 May 2010 Application Accepted

  Published as AU-B-2004280471

9 September 2010 Standard Patent Sealed

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