Distance holder with helical slot

Details for Australian Patent Application No. 2008228174 (hide)

Owner Shell Internationale Research Maatschappij B.V.

Inventors Blange, Jan-Jette

Agent Spruson & Ferguson

Pub. Number AU-B-2008228174

PCT Pub. Number WO2008/113844

Priority 07104677.5 22.03.07 EP

Filing date 20 March 2008

Wipo publication date 25 September 2008

Acceptance publication date 14 April 2011

International Classifications

E21B 7/18 (2006.01) Special methods or apparatus for drilling - Drilling by liquid or gas jets, with or without entrained pellets

E21B 21/00 (2006.01) Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor

Event Publications

8 October 2009 PCT application entered the National Phase

  PCT publication WO2008/113844 Priority application(s): WO2008/113844

14 April 2011 Application Accepted

  Published as AU-B-2008228174

11 August 2011 Standard Patent Sealed

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