METHOD OF DYNAMICALLY CONTROLLING BOTTOM HOLE CIRCULATION PRESSURE IN A WELLBORE

Details for Australian Patent Application No. 2002254815 (hide)

Owner NORTHLAND ENERGY CORPORATION

Inventors HOYER, Carel, W., J.; GRAHAM, Robert, A.; STEINER, Adrian

Pub. Number AU-A-2002254815

PCT Pub. Number WO2002/084067

Priority 2,344,627 18.04.01 CA

Filing date 9 April 2002

Wipo publication date 28 October 2002

International Classifications

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

Event Publications

17 April 2003 Application Open to Public Inspection

  Published as AU-A-2002254815

19 February 2004 Application Lapsed, Refused Or Withdrawn, Patent Ceased or Expired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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