Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5431230 | Slant wellbore tubing anchor catcher with rotating mandrel | Rodger D. Lacy | 1995-07-11 |
| 5327975 | Tubing anchor catcher with rotating mandrel | — | 1994-07-12 |
| 5139090 | Tubing rotator with downhole tubing swivel | — | 1992-08-18 |
| 4860826 | Apparatus for sealing a tubing string in a high pressure wellbore | — | 1989-08-29 |