Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5634521 | Valve assembly for downhole hydraulically actuated pump | — | 1997-06-03 |
| 5104296 | Engine end for a downhole hydraulically actuated pump assembly | — | 1992-04-14 |
| 5055002 | Downhole pump with retrievable nozzle assembly | — | 1991-10-08 |
| 4768589 | Downhole hydraulic actuated pump | — | 1988-09-06 |
| 4744730 | Downhole jet pump with multiple nozzles axially aligned with venturi for producing fluid from boreholes | — | 1988-05-17 |
| 4664186 | Downhold hydraulic actuated pump | — | 1987-05-12 |
| 4544335 | Piston and valve assembly | — | 1985-10-01 |
| 4477234 | Double acting engine and pump | — | 1984-10-16 |
| 4403922 | Seal gland improvements for hydraulically actuated downhole pumps | — | 1983-09-13 |
| 4369022 | Valve assembly for hydraulically actuated downhole pumps | — | 1983-01-18 |
| 4329916 | Packer nose assembly | — | 1982-05-18 |
| 4321015 | Downhole, hydraulically actuated pump assembly with pressure settable packer nose assembly | — | 1982-03-23 |
| 4293283 | Jet with variable throat areas using a deflector | — | 1981-10-06 |
| 4285215 | Rotary table and kelly guard | — | 1981-08-25 |
| 4268227 | Downhole, hydraulically-actuated pump and cavity having closed power fluid flow | — | 1981-05-19 |
| 4248299 | Packer nose assembly | — | 1981-02-03 |
| 4214854 | Hydraulically actuated pump assembly having mechanically actuated valve means | — | 1980-07-29 |
| 4202656 | Downhole hydraulically actuated pump with jet boost | — | 1980-05-13 |
| 4183722 | Downhole jet pumps | — | 1980-01-15 |