Dave C. Andrews

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Bryan, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Hydraulic interlock system between casing gripper and spider
- Patent number 8,439,121
- Issue date May 14, 2013
- Tesco Corporation
- Kevin J. Nikiforuk
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Hydraulic Interlock System Between Casing Gripper and Spider
- Publication number 20110114308
- Publication date May 19, 2011
- Tesco Corporation
- Kevin J. Nikiforuk
- E21 - EARTH DRILLING MINING