Perkins; Donald H.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Perkins; Donald H..The latest application filed is for "subsea mechanism to circulate fluid between a riser and tubing string".
- Perkins; Donald H. - Houston TX
- Perkins; Donald H. - Allen TX
- Perkins; Donald H. - Carrollton TX
| Patent | Date |
|---|---|
| Subsea mechanism to circulate fluid between a riser and tubing string Grant 10,006,270 - Schwendemann , et al. June 26, 2 | 2018-06-26 |
| Subsea Mechanism to Circulate Fluid Between a Riser and Tubing String App 20170074069 - Schwendemann; Kenneth L. ; et al. | 2017-03-16 |
| System and method of mixing a formation fluid sample in a downhole sampling chamber with a magnetic mixing element Grant 8,960,998 - Ringgenberg , et al. February 24, 2 | 2015-02-24 |
| System and Method of Mixing a Formation Fluid Sample Obtained in a Downhole Sampling Chamber App 20130315024 - Ringgenberg; Paul David ; et al. | 2013-11-28 |
| Fiber optic differential pressure sensor Grant 7,458,273 - Skinner , et al. December 2, 2 | 2008-12-02 |
| Fiber Optic Differential Pressure Sensor App 20070068262 - Skinner; Neal G. ; et al. | 2007-03-29 |
| Fiber optic differential pressure sensor Grant 7,159,468 - Skinner , et al. January 9, 2 | 2007-01-09 |
| Fiber optic differential pressure sensor App 20050274194 - Skinner, Neal G. ; et al. | 2005-12-15 |
| Monitor and control circuit for electric surface controlled subsurface valve system Grant 5,293,551 - Perkins , et al. March 8, 1 | 1994-03-08 |
| Downhole reeled tubing inspection system with fiberoptic cable Grant 5,275,038 - Sizer , et al. January 4, 1 | 1994-01-04 |
| Electric surface controlled subsurface valve system Grant 4,981,173 - Perkins , et al. January 1, 1 | 1991-01-01 |
| Electric surface controlled subsurface valve system Grant 4,886,114 - Perkins , et al. December 12, 1 | 1989-12-12 |
| Solenoid operated safety valve and submersible pump system Grant 4,798,247 - Deaton , et al. January 17, 1 | 1989-01-17 |
| Ball valve structure Grant 4,738,431 - Perkins April 19, 1 | 1988-04-19 |
| Well packer Grant 4,582,134 - Gano , et al. April 15, 1 | 1986-04-15 |
| Well packer Grant 4,512,399 - Gano , et al. April 23, 1 | 1985-04-23 |
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