Issued Patents All Time
Showing 126–137 of 137 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4729430 | Pressure limiter for a downhole pump and testing apparatus | Kevin White | 1988-03-08 |
| 4711305 | Multi-mode testing tool and method of testing | — | 1987-12-08 |
| 4694903 | Flapper type annulus pressure responsive tubing tester valve | — | 1987-09-22 |
| 4693316 | Round mandrel slip joint | Daniel Anderson Newman, Harold Kent Beck | 1987-09-15 |
| 4667743 | Low pressure responsive tester valve with ratchet | Harold Kent Beck | 1987-05-26 |
| 4665983 | Full bore sampler valve with time delay | — | 1987-05-19 |
| 4657083 | Pressure operated circulating valve with releasable safety and method for operating the same | — | 1987-04-14 |
| 4657082 | Circulation valve and method for operating the same | — | 1987-04-14 |
| 4655288 | Lost-motion valve actuator | Wesley J. Burris, II | 1987-04-07 |
| 4650001 | Assembly for reducing the force applied to a slot and lug guide | — | 1987-03-17 |
| 4633952 | Multi-mode testing tool and method of use | — | 1987-01-06 |
| 4619319 | Packer and actuation portion of tubing conveyed completion system | — | 1986-10-28 |