Sproul; Richard M.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Sproul; Richard M..The latest application filed is for "single bore packer with dual flow conversion for gas lift completion".
- Sproul; Richard M. - Grapevine TX
| Patent | Date |
|---|---|
| Single bore packer with dual flow conversion for gas lift completion Grant 5,048,610 - Ross , et al. September 17, 1 | 1991-09-17 |
| Dual flapper valve assembly Grant 4,846,281 - Clary , et al. July 11, 1 | 1989-07-11 |
| Multi-position tool and method for running and setting a packer Grant 4,832,129 - Sproul , et al. May 23, 1 | 1989-05-23 |
| Expendable flapper valve Grant 4,813,481 - Sproul , et al. March 21, 1 | 1989-03-21 |
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