Spring preloaded bearing assembly and well drilling equipment comprising same

Details for Australian Patent Application No. 2008101295 (hide)

Owner Hampton IP Holdings Co., LLC

Inventors Williams, John R.

Agent Shelston IP

Pub. Number AU-A-2008101295

Priority 60/966,280 27.08.07 US; 12/069,103 07.02.08 US

Filing date 8 July 2008

Opi date 30 August 2012

International Classifications

E21B 3/04 Rotary drilling

Event Publications

30 August 2012 Innovation Patent Open to Public Inspection

  Published as AU-A-2008101295

30 August 2012 Innovation Patent Sealed

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