Drilling system with a barrel drilling head driven by a downhole tractor

Details for Australian Patent Application No. 2008243507 (hide)

Owner Welltec A/S

Inventors Hallundbaek, Jorgen

Agent Davies Collison Cave

Pub. Number AU-A-2008243507

PCT Pub. Number WO2008/131772

Priority PA 2007 00615 26.04.07 DK

Filing date 28 April 2008

Wipo publication date 6 November 2008

International Classifications

E21B 25/00 (2006.01) Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors

E21B 4/18 (2006.01) Drives for drilling, used in the borehole

E21B 23/14 (2006.01) Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells

E21B 49/02 (2006.01) Testing the nature of borehole walls

Event Publications

12 November 2009 PCT application entered the National Phase

  PCT publication WO2008/131772 Priority application(s): WO2008/131772

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