Downhole tractor with improved valve system

Details for Australian Patent Application No. 2004210989 (hide)

Owner Western Well Tool Inc.

Inventors Krueger, Ernst; Bloom, Duane; Moore, N. Bruce; Mock, Phillip A.

Agent Davies Collison Cave

Pub. Number AU-B-2004210989

PCT Pub. Number WO2004/072433

Priority 60/446,644 10.02.03 US; 60/448,163 14.02.03 US; 10/745,400 23.12.03 US

Filing date 10 February 2004

Wipo publication date 26 August 2004

Acceptance publication date 11 December 2008

International Classifications

E21B 4/18 (2006.01) Drives for drilling, used in the borehole

E21B 23/00 (2006.01) Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells

Event Publications

1 September 2005 PCT application entered the National Phase

  PCT publication WO2004/072433 Priority application(s): WO2004/072433

11 December 2008 Application Accepted

  Published as AU-B-2004210989

9 April 2009 Standard Patent Sealed

23 June 2011 Alteration of Name

  The name of the patentee has been altered to WWT International Inc.

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