Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5794699 | Metal-to-metal sliding side door for wells | Robert C. Hammett, Bhanubhai H. Patel, William R. Welch | 1998-08-18 |
| 5163515 | Pumpdown toolstring operations in horizontal or high-deviation oil or gas wells | Roger Tailby, Joseph L. Pearce, John H. Yonker, Marion D. Kilgore, Jack Gammill Clemens | 1992-11-17 |
| 5044443 | Method and apparatus for producing wells | Roddie R. Smith | 1991-09-03 |
| 5022427 | Annular safety system for gas lift production | Michael Wade Meaders, Nam Van Le | 1991-06-11 |
| 4842074 | Gas storage well safety system and method | Craig D. Hines, Michael J. Bednarz | 1989-06-27 |
| 4723606 | Surface controlled subsurface safety valve | Michael B. Vinzant, Phillip S. Sizer, Rennie L. Dickson, Roddie R. Smith | 1988-02-09 |
| 4375237 | Well equipment setting or retrieval tool | — | 1983-03-01 |
| 4291722 | Drill string safety and kill valve | — | 1981-09-29 |
| 4248302 | Method and apparatus for recovering viscous petroleum from tar sand | — | 1981-02-03 |
| 4182159 | Pressure testing tool | — | 1980-01-08 |