Safety valve torsional spring assembly and method

Details for Australian Patent Application No. 2009201080 (hide)

Owner BJ Services Company

Inventors Mondelli, Maximilliano; Henschel, Robert; Jancha, Robert

Agent Shelston IP

Pub. Number AU-B-2009201080

Priority 12/056,503 27.03.08 US

Filing date 17 March 2009

Wipo publication date 15 October 2009

Acceptance publication date 24 March 2011

International Classifications

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

E21B 34/00 (2006.01) Valve arrangements for boreholes or wells

E21B 34/06 (2006.01) Valve arrangements for boreholes or wells

Event Publications

2 April 2009 Complete Application Filed

  Priority application(s): 12/056,503 27.03.08 US

15 October 2009 Application Open to Public Inspection

  Published as AU-B-2009201080

24 March 2011 Application Accepted

  Published as AU-B-2009201080

21 July 2011 Standard Patent Sealed

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