Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6012521 | Downhole pressure wave generator and method for use thereof | Thomas T. Hansen | 2000-01-11 |
| 4903765 | Delayed opening fluid sampler | — | 1990-02-27 |
| 4883123 | Above packer perforate, test and sample tool and method of use | H. Kent Beck, Jon B. Christensen | 1989-11-28 |
| 4877086 | Pressure limiter for a downhole pump and testing apparatus | — | 1989-10-31 |
| 4793411 | Retrievable gravel packer and retrieving tool | — | 1988-12-27 |
| 4789271 | Remote fluid transfer system and method for sub-sea baseplates and templates | Bob L. Sullaway, Lloyd C. Knox | 1988-12-06 |
| 4736798 | Rapid cycle annulus pressure responsive tester valve | — | 1988-04-12 |
| 4726419 | Single zone gravel packing system | — | 1988-02-23 |
| 4691779 | Hydrostatic referenced safety-circulating valve | Michael E. McMahan, Daniel Anderson Newman, Donald W. Winslow | 1987-09-08 |
| 4664188 | Retrievable well packer | Lee W. Stepp, Michael L. Bolin | 1987-05-12 |
| 4638859 | Gravel packer | Michael L. Bolin | 1987-01-27 |
| 4635716 | Gravel packer | — | 1987-01-13 |
| 4633944 | Gravel packer | Michael L. Bolin | 1987-01-06 |
| 4633943 | Gravel packer | — | 1987-01-06 |
| 4628993 | Foam gravel packer | — | 1986-12-16 |
| 4627491 | Well packer | — | 1986-12-09 |
| 4619325 | Well surging method and system | — | 1986-10-28 |
| 4606408 | Method and apparatus for gravel-packing a well | Lee W. Stepp, David D. Szarka | 1986-08-19 |
| 4583593 | Hydraulically activated liner setting device | Lee W. Stepp | 1986-04-22 |
| 4567944 | Retrievable straddle packer | Samuel W. Cantrell | 1986-02-04 |