Hydraulic drill string accumulator

Details for Australian Patent Application No. 2002234540 (hide)

Owner Shell Internationale Research Maatschappij B.V.

Inventors Kriesels, Petrus Cornelis; Zijsling, Djurre Hans

Agent Spruson & Ferguson

Pub. Number AU-B-2002234540

PCT Pub. Number WO02/42647

Priority 00204199.4 27.11.00 EP

Filing date 27 November 2001

Wipo publication date 3 June 2002

Acceptance publication date 6 April 2006

International Classifications

E21B 4/14 (2006.01) Drives for drilling, used in the borehole

Event Publications

6 April 2006 Application Accepted

  Published as AU-B-2002234540

3 August 2006 Standard Patent Sealed

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