Method of freeing stuck drill pipe

Details for Australian Patent Application No. 2002348211 (hide)

Owner Shell Internationale Research Maatschappij B.V.

Inventors Hale, Arthur Herman; Tutuncu, Azra Nur

Agent Spruson & Ferguson

Pub. Number AU-B-2002348211

PCT Number PCT/US02/39502

PCT Pub. Number WO2003/050383

Priority 60/339,520 11.12.01 US

Filing date 11 December 2002

Wipo publication date 23 June 2003

Acceptance publication date 27 September 2007

International Classifications

E21B 31/00 (2006.01) Fishing for or freeing objects in boreholes or wells

Event Publications

13 March 2003 Complete Application Filed

  Priority application(s): 60/339,520 11.12.01 US

28 August 2003 Application Open to Public Inspection

  Published as AU-B-2002348211

27 September 2007 Application Accepted

  Published as AU-B-2002348211

24 January 2008 Standard Patent Sealed

5 July 2012 Application Lapsed, Refused Or Withdrawn, Patent Ceased or Expired

  This patent ceased under section 143(a), or Expired. Note that applications or patents shown as lapsed or ceased may be restored at a later date.

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