Issued Patents All Time
Showing 101–110 of 110 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5058684 | Drill pipe bridge plug | Donald W. Winslow | 1991-10-22 |
| 5029643 | Drill pipe bridge plug | Donald W. Winslow | 1991-07-09 |
| 4826356 | Pressure actuated flow control valve | — | 1989-05-02 |
| 4662446 | Liner seal and method of use | Michael L. Bolin | 1987-05-05 |
| 4662453 | Liner screen tieback packer apparatus and method | — | 1987-05-05 |
| 4658895 | Gravel pack safety sub | — | 1987-04-21 |
| 4613161 | Coupling device | — | 1986-09-23 |
| 4569396 | Selective injection packer | — | 1986-02-11 |
| 4524998 | Tubular connecting device | — | 1985-06-25 |
| 4290482 | Plug container | — | 1981-09-22 |