Ball operated by-pass tool for use in drillstring

Details for Australian Patent Application No. 2003269103 (hide)

Owner Lee, P.

Inventors Lee, Paul Bernard

Agent FB Rice

Pub. Number AU-B-2003269103

PCT Number PCT/GB03/03786

PCT Pub. Number WO2004/022907

Priority 0220447.7 03.09.02 GB

Filing date 1 September 2003

Wipo publication date 29 March 2004

Acceptance publication date 17 April 2008

International Classifications

E21B 21/10 (2006.01) Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor

E21B 34/14 (2006.01) Valve arrangements for boreholes or wells

Event Publications

15 January 2004 Complete Application Filed

  Priority application(s): 0220447.7 03.09.02 GB

13 May 2004 Application Open to Public Inspection

  Published as AU-B-2003269103

17 April 2008 Application Accepted

  Published as AU-B-2003269103

14 August 2008 Standard Patent Sealed

27 October 2011 Assignment Registered

  Lee, Paul The patent has been assigned to Schoeller-Bleckmann Oilfield Equipment AG

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