John C. Birdwell

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Liberty, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Compensator system for wellbore tubulars
- Patent number 6,056,060
- Issue date May 2, 2000
- Weatherford/Lamb, Inc.
- Egill Abrahamsen
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Wellbore tubular compensator system
- Patent number 6,000,472
- Issue date Dec 14, 1999
- Weatherford/Lamb, Inc.
- Stephen L. Albright
- E21 - EARTH DRILLING MINING