Method for determining dead zone of valve

Details for Australian Patent Application No. 2009247995 (hide)

Owner SANDVIK MINING AND CONSTRUCTION OY

Inventors Puura, Jussi; Saarela, Markus

Agent Griffith Hack

Pub. Number AU-B-2009247995

PCT Pub. Number WO2009/138558

Priority 20085445 13.05.08 FI

Filing date 11 May 2009

Wipo publication date 19 November 2009

Acceptance publication date 22 December 2011

International Classifications

E21B 7/02 (2006.01) Special methods or apparatus for drilling - Drilling rigs characterised by means for land transport, e.g. skid mounting or wheel mounting

E21B 44/00 (2006.01) Automatic control

F15B 13/044 (2006.01) Details of servomotor systems

F15B 19/00 (2006.01) Testing fluid-pressure actuator systems or apparatus, so far as not provided for elsewhere

Event Publications

13 January 2011 PCT application entered the National Phase

  PCT publication WO2009/138558 Priority application(s): WO2009/138558

22 December 2011 Application Accepted

  Published as AU-B-2009247995

19 April 2012 Standard Patent Sealed

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