Drill string valve actuator with inflatable seals

Details for Australian Patent Application No. 2011200796 (hide)

Owner Hydril USA Manufacturing LLC

Inventors Childers, Leonard G.; Griffin, Tom

Agent Phillips Ormonde Fitzpatrick

Pub. Number AU-A-2011200796

Priority 12/713,260 26.02.10 US

Filing date 24 February 2011

Wipo publication date 15 September 2011

International Classifications

E21B 21/10 (2006.01) Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor

F16K 5/08 (2006.01) Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary

F16K 17/00 (2006.01) Safety valves

Event Publications

10 March 2011 Complete Application Filed

  Priority application(s): 12/713,260 26.02.10 US

15 September 2011 Application Open to Public Inspection

  Published as AU-A-2011200796

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