CHOKE FOR CONTROLLING THE FLOW OF DRILLING MUD

Details for Australian Patent Application No. 2003242762 (hide)

Owner SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.

Inventors VAN RIET, Egbert, Jan

Pub. Number AU-A-2003242762

PCT Number PCT/EP03/06750

PCT Pub. Number WO2004/005667

Priority 02254746.7 08.07.02 EP

Filing date 24 June 2003

Wipo publication date 23 January 2004

International Classifications

E21B 021/10 Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor

E21B 021/08 Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor

Event Publications

11 September 2003 Complete Application Filed

  Priority application(s): 02254746.7 08.07.02 EP

11 March 2004 Application Open to Public Inspection

  Published as AU-A-2003242762

7 April 2005 Application Lapsed, Refused Or Withdrawn, Patent Ceased or Expired

  This application lapsed under section 142(2)(f)/See Reg. 8.3(3). Examination has not yet been requested or directed for this application. Note that applications or patents shown as lapsed or ceased may be restored at a later date.

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