System for drilling a wellbore

Details for Australian Patent Application No. 2008250002 (hide)

Owner Shell Internationale Research Maatschappij B.V.

Inventors Zijsling, Djurre Hans; Shuster, Mark Michael; Grinberg, Grigoriy; Wubben, Antonius Leonardus Maria; Van Den Brekel, Bernardus Johannes Henricus; Shade, Matthew Martin

Agent Spruson & Ferguson

Pub. Number AU-A-2008250002

PCT Pub. Number WO2008/138957

Priority 07108250.7 15.05.07 EP

Filing date 15 May 2008

Wipo publication date 20 November 2008

International Classifications

C09K 8/08 (2006.01) Compositions for drilling of boreholes or wells

C09K 8/18 (2006.01) Compositions for drilling of boreholes or wells

C10M 169/04 (2006.01) Mixtures of base-materials, thickeners and additives

E21B 17/10 (2006.01) Drilling rods or pipes

Event Publications

3 December 2009 PCT application entered the National Phase

  PCT publication WO2008/138957 Priority application(s): WO2008/138957

14 June 2012 Application Lapsed, Refused Or Withdrawn, Patent Ceased or Expired

  This application lapsed under section 142(2)(e). Examination has been requested or an examination report has issued for this application. Note that applications or patents shown as lapsed or ceased may be restored at a later date.

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