SYSTEM TO REDUCE HYDROSTATIC PRESSURE IN RISERS USING BUOYANT SPHERES

Details for Australian Patent Application No. 2002327078 (hide)

Owner VARCO I/P, INC.

Inventors BOYADJIEFF, George

Pub. Number AU-A-2002327078

PCT Number PCT/US02/30950

PCT Pub. Number WO2004/029404

Filing date 27 September 2002

Wipo publication date 19 April 2004

International Classifications

E21B 021/01 Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor

Event Publications

23 January 2003 Complete Application Filed

20 May 2004 Application Open to Public Inspection

  Published as AU-A-2002327078

16 June 2005 Application Lapsed, Refused Or Withdrawn, Patent Ceased or Expired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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