Azimuth initialization and calibration of wellbore surveying gyroscopic and inertial instruments by means of an external navigation system

Details for Australian Patent Application No. 2010313857 (hide)

Owner Sinvent AS

Inventors Bang, Jon; Torkildsen, Torgeir

Agent Davies Collison Cave

Pub. Number AU-A-2010313857

PCT Pub. Number WO2011/053161

Priority 61/256,398 30.10.09 US

Filing date 1 November 2010

Wipo publication date 5 May 2011

International Classifications

E21B 47/024 (2006.01) Survey of boreholes or wells

G01C 21/16 (2006.01) Navigation

Event Publications

24 May 2012 PCT application entered the National Phase

  PCT publication WO2011/053161 Priority application(s): WO2011/053161

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