Issued Patents All Time
Showing 26–42 of 42 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5207274 | Apparatus and method of anchoring and releasing from a packer | Kevin T. Berscheidt | 1993-05-04 |
| 4834184 | Drillable, testing, treat, squeeze packer | Donald F. Hushbeck | 1989-05-30 |
| 4823881 | Hydraulic setting tool | — | 1989-04-25 |
| 4773478 | Hydraulic setting tool | — | 1988-09-27 |
| 4432419 | Retrievable plug | — | 1984-02-21 |
| 4412559 | Dog locking sleeve | R. Benton Nickles, Harold O. Treece | 1983-11-01 |
| 4367983 | Leg closure | — | 1983-01-11 |
| 4322181 | Conductor pipe plug and method of installing conductor pipe | R. Benton Nickles | 1982-03-30 |
| 4310161 | Inflatable packer element | — | 1982-01-12 |
| 4310265 | Pile wiper seal | — | 1982-01-12 |
| 4286629 | Removable plug | Lloyd C. Knox | 1981-09-01 |
| 4262702 | Conductor pipe plug | — | 1981-04-21 |
| 4253676 | Inflatable packer element with integral support means | Eugene E. Baker | 1981-03-03 |
| 4250966 | Insertion type cementing baffle | Lloyd C. Knox | 1981-02-17 |
| 4249576 | Retrievable plug for offshore platforms having shear type retaining means | L. Carter Knox, Bob L. Sullaway | 1981-02-10 |
| 4184515 | Retrievable plug for offshore platforms having shear type retaining means | Lloyd C. Knox, Bob L. Sullaway | 1980-01-22 |
| 4181454 | Pile wiper seal | Lloyd C. Knox | 1980-01-01 |