Top drive system

Details for Australian Patent Application No. 2008334992 (hide)

Owner Weatherford/Lamb, Inc.

Inventors Rials, Ross; Olstad, Delaney Michael; Fisher, Raleigh; Heidecke, Karsten

Agent Spruson & Ferguson

Pub. Number AU-B-2008334992

PCT Pub. Number WO2009/076648

Priority 61/013,235 12.12.07 US

Filing date 12 December 2008

Wipo publication date 18 June 2009

Acceptance publication date 16 February 2012

International Classifications

E21B 3/02 (2006.01) Rotary drilling

E21B 19/00 (2006.01) Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick

Event Publications

17 June 2010 PCT application entered the National Phase

  PCT publication WO2009/076648 Priority application(s): WO2009/076648

16 February 2012 Application Accepted

  Published as AU-B-2008334992

14 June 2012 Standard Patent Sealed

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