VISCOELASTIC SURFACTANT FLUIDS STABLE AT HIGH BRINE CONCENTRATION AND METHODS OF USING SAME

Details for Australian Patent Application No. 2003229781 (hide)

Owner SOFITECH N.V.

Inventors FU, Diankui; CHEN, Yiyan; XIAO, Zhijun; SAMUEL, Mathew; DANIEL, Sylvie

Pub. Number AU-A-2003229781

PCT Number PCT/EP03/04927

PCT Pub. Number WO2003/097995

Priority 10/308,619 03.12.02 US; 60/382,179 21.05.02 US

Filing date 12 May 2003

Wipo publication date 2 December 2003

International Classifications

E21B 043/26 Obtaining fluids from wells

E21B 033/138 Sealing or packing boreholes or wells - Plastering the borehole wall

E21B 037/06 Methods or apparatus for cleaning boreholes or wells

Event Publications

14 August 2003 Complete Application Filed

  Priority application(s): 10/308,619 03.12.02 US; 60/382,179 21.05.02 US

29 January 2004 Application Open to Public Inspection

  Published as AU-A-2003229781

10 February 2005 Application Lapsed, Refused Or Withdrawn, Patent Ceased or Expired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