Method and apparatus for drilling largediameter hole in ground

Details for Australian Patent Application No. 2010253666 (hide)

Owner Core Geotechnics Co., Ltd.

Inventors Park, Sun Keun

Agent Wrays

Pub. Number AU-A-2010253666

PCT Pub. Number WO2010/137798

Priority 10-2009-0047054 28.05.09 KR

Filing date 14 April 2010

Wipo publication date 2 December 2010

International Classifications

E21B 3/00 (2006.01) Rotary drilling

E21B 10/36 (2006.01) Drilling tools - Percussion drill bits

Event Publications

13 October 2011 PCT application entered the National Phase

  PCT publication WO2010/137798 Priority application(s): WO2010/137798

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