Constant force actuator

Details for Australian Patent Application No. 2003201381 (hide)

Owner Schlumberger Technology B.V.

Inventors Cordera, Joseph F; Post, Roger A; Roy, Carl J; Sheiretov, Todor K

Agent Griffith Hack

Pub. Number AU-B-2003201381

Priority 10/321858 17.12.02 US; 60/364189 13.03.02 US

Filing date 12 March 2003

Wipo publication date 9 October 2003

Acceptance publication date 13 September 2007

International Classifications

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

B66F 3/12 (2006.01) Devices, e.g. jacks, adapted for uninterrupted lifting of loads

B66F 3/22 (2006.01) Devices, e.g. jacks, adapted for uninterrupted lifting of loads

E21B 17/10 (2006.01) Drilling rods or pipes

E21B 23/01 (2006.01) Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells

E21B 23/04 (2006.01) Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells

E21B 47/08 (2006.01) Survey of boreholes or wells

Event Publications

8 May 2003 Complete Application Filed

  Priority application(s): 10/321858 17.12.02 US; 60/364189 13.03.02 US

9 October 2003 Application Open to Public Inspection

  Published as AU-B-2003201381

14 October 2004 Assignment before Grant

  Sofitech N. V. The application has been assigned to Schlumberger Technology B.V.

13 September 2007 Application Accepted

  Published as AU-B-2003201381

17 January 2008 Standard Patent Sealed

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