Constant-mode auto-drill with pressure derivative control

Details for Australian Patent Application No. 2008248159 (hide)

Owner Vermeer Manufacturing Company

Inventors Carlson, Robin W.; Lane, Philip R.

Agent Spruson & Ferguson

Pub. Number AU-B-2008248159

PCT Pub. Number WO2008/137078

Priority 60/927,567 03.05.07 US

Filing date 2 May 2008

Wipo publication date 13 November 2008

Acceptance publication date 3 May 2012

International Classifications

E21B 7/04 (2006.01) Special methods or apparatus for drilling - Directional drilling

E21B 44/06 (2006.01) Automatic control

Event Publications

3 December 2009 PCT application entered the National Phase

  PCT publication WO2008/137078 Priority application(s): WO2008/137078

3 May 2012 Application Accepted

  Published as AU-B-2008248159

30 August 2012 Standard Patent Sealed

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