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Craig D. Hines
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Carrollton, TX, US
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last 30 patents
Information
Patent Grant
Streamlined flapper valve
Patent number
5,323,859
Issue date
Jun 28, 1994
Halliburton Company
Roddie R. Smith
E21 - EARTH DRILLING MINING
Information
Patent Grant
Surface controlled annulus safety system for well bores
Patent number
5,318,127
Issue date
Jun 7, 1994
Halliburton Company
Craig D. Hines
E21 - EARTH DRILLING MINING
Information
Patent Grant
Streamlined flapper valve
Patent number
5,137,089
Issue date
Aug 11, 1992
Otis Engineering Corporation
Roddie R. Smith
E21 - EARTH DRILLING MINING
Information
Patent Grant
Gas storage well safety system and method
Patent number
4,842,074
Issue date
Jun 27, 1989
Otis Engineering Corporation
Craig D. Hines
E21 - EARTH DRILLING MINING
Information
Patent Grant
Surface controlled subsurface safety valve
Patent number
4,834,183
Issue date
May 30, 1989
Otis Engineering Corporation
Michael B. Vinzant
E21 - EARTH DRILLING MINING