Richard M. Sproul

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Grapevine, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Single bore packer with dual flow conversion for gas lift completion
- Patent number 5,113,939
- Issue date May 19, 1992
- Otis Engineering Corporation
- Colby M. Ross
- E21 - EARTH DRILLING MINING
Information Patent Grant
Single bore packer with dual flow conversion for gas lift completion
- Patent number 5,048,610
- Issue date Sep 17, 1991
- Otis Engineering Corporation
- Colby M. Ross
- E21 - EARTH DRILLING MINING
Information Patent Grant
Dual hydraulic set packer
- Patent number 4,930,573
- Issue date Jun 5, 1990
- Otis Engineering Corporation
- Andrew R. Lane
- E21 - EARTH DRILLING MINING
Information Patent Grant
Dual flapper valve assembly
- Patent number 4,846,281
- Issue date Jul 11, 1989
- Otis Engineering Corporation
- Sammy R. Clary
- E21 - EARTH DRILLING MINING
Information Patent Grant
Multi-position tool and method for running and setting a packer
- Patent number 4,832,129
- Issue date May 23, 1989
- Otis Engineering Corporation
- Richard M. Sproul
- E21 - EARTH DRILLING MINING
Information Patent Grant
Expendable flapper valve
- Patent number 4,813,481
- Issue date Mar 21, 1989
- Otis Engineering Corporation
- Richard M. Sproul
- E21 - EARTH DRILLING MINING
Information Patent Grant
Well packer
- Patent number 4,671,354
- Issue date Jun 9, 1987
- Otis Engineering Corporation
- William D. Henderson
- E21 - EARTH DRILLING MINING