OSCILLATING SHEAR VALVE FOR MUD PULSE TELEMETRY

Details for Australian Patent Application No. 2002240520 (hide)

Owner BAKER HUGUES INCORPORATED

Inventors PETERS, Volker; ROUATBI, Cedric; HAHN, Detlef

Pub. Number AU-A-2002240520

PCT Pub. Number WO2002/068797

Priority 09/794,964 27.02.01 US

Filing date 27 February 2002

Wipo publication date 12 September 2002

International Classifications

E21B 047/18 Survey of boreholes or wells

Event Publications

6 March 2003 Application Open to Public Inspection

  Published as AU-A-2002240520

12 February 2004 Application Lapsed, Refused Or Withdrawn, Patent Ceased or Expired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