Don Pike

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Airdrie, CA

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Patents Grantslast 30 patents

Information Patent Grant
Flow control valve and method of controlling rotation in a downhole...
- Patent number 7,086,486
- Issue date Aug 8, 2006
- BJ Services Company
- John Edward Ravensbergen
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Flow control valve
- Publication number 20050173157
- Publication date Aug 11, 2005
- BJ Services Company
- John Edward Ravensbergen
- E21 - EARTH DRILLING MINING