Downhole Surge Pressure Reduction and Filtering Apparatus

Details for Australian Patent Application No. 2007200592 (hide)

Owner Weatherford/Lamb, Inc.

Inventors Scott,Thad Joseph; Pederden, Gerald Dean; Giroux, Richard Lee; Pluchek, Clayton Stanley; Haugen, David Michael

Agent Fraser Old & Sohn

Pub. Number AU-B-2007200592

Parent 2005225147

Filing date 12 February 2007

Wipo publication date 1 March 2007

Acceptance publication date 23 April 2009

International Classifications

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

E21B 27/00 (2006.01) Containers for collecting or depositing substances in boreholes or wells, e.g. bailers for collecting mud or sand

E21B 33/14 (2006.01) Sealing or packing boreholes or wells

E21B 33/16 (2006.01) Sealing or packing boreholes or wells

E21B 37/00 (2006.01) Methods or apparatus for cleaning boreholes or wells

E21B 37/10 (2006.01) Methods or apparatus for cleaning boreholes or wells

E21B 43/10 (2006.01) Obtaining fluids from wells

E21B 34/00 (2006.01) Valve arrangements for boreholes or wells

Event Publications

1 March 2007 Application Open to Public Inspection

  Published as AU-B-2007200592

1 March 2007 Complete Application Filed

23 April 2009 Application Accepted

  Published as AU-B-2007200592

25 June 2009 Application for Amendment

  The nature of the amendment is as shown in the statement(s) filed 12 May 2009. Address for service in Australia - Fraser Old & Sohn Level 10 275 Alfred Street North Sydney NSW 2060

22 October 2009 Amendment Made

  The nature of the amendment is as shown in the statement(s) filed 12 May 2009

22 October 2009 Standard Patent Sealed

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