THE METHOD FOR FILTRATING DRILLING FLUID IN ROTARY WAY AND DEVICES USED IN THE METHOD

Details for Australian Patent Application No. 2002215810 (hide)

Owner NIU, Zijiu

Inventors NIU, Zijiu

Pub. Number AU-A-2002215810

PCT Pub. Number WO2002/055839

Priority 01100460.6 15.01.01 CN

Filing date 4 December 2001

Wipo publication date 24 July 2002

International Classifications

E21B 021/06 Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor

B01D 033/35 Filters with filtering elements which move during the filtering operation

B01D 033/56 Filters with filtering elements which move during the filtering operation

B01D 033/11 Filters with filtering elements which move during the filtering operation

B01D 033/29 Filters with filtering elements which move during the filtering operation

Event Publications

6 February 2003 Application Open to Public Inspection

  Published as AU-A-2002215810

5 February 2004 Application Lapsed, Refused Or Withdrawn, Patent Ceased or Expired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