Seaboard Wellhead, Inc.

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Houston, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
X-shaped high pressure sealing structure
- Patent number 4,787,642
- Issue date Nov 29, 1988
- Seaboard Wellhead, Inc.
- Reggie H. Etheridge
- E21 - EARTH DRILLING MINING
Information Patent Grant
Piloted wellhead flow control valve
- Patent number 4,662,603
- Issue date May 5, 1987
- Seaboard Wellhead, Inc.
- Reggie H. Etheridge
- E21 - EARTH DRILLING MINING