AN OIL PUMPING UNIT WITH A SUPPORTING PIPE

Details for Australian Patent Application No. 2003236159 (hide)

Owner LI, Hualin

Inventors LI, Hualin

Pub. Number AU-A-2003236159

PCT Number PCT/CN03/00301

PCT Pub. Number WO2004/001184

Priority 02121439.5 21.06.02 CN

Filing date 24 April 2003

Wipo publication date 6 January 2004

International Classifications

E21B 043/00 Obtaining fluids from wells

F04B 047/02 Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps

F16H 025/22 Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms - with balls, rollers, or similar members between the co-operating parts

Event Publications

4 September 2003 Complete Application Filed

  Priority application(s): 02121439.5 21.06.02 CN

4 March 2004 Application Open to Public Inspection

  Published as AU-A-2003236159

10 March 2005 Application Lapsed, Refused Or Withdrawn, Patent Ceased or Expired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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