Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5390739 | Hydraulic tool and hydraulic pressure device | — | 1995-02-21 |
| 5337819 | Washing tool | — | 1994-08-16 |
| 5163515 | Pumpdown toolstring operations in horizontal or high-deviation oil or gas wells | Joseph L. Pearce, John H. Yonker, Marion D. Kilgore, Ronald K. Churchman, Jack Gammill Clemens | 1992-11-17 |
| 5141056 | Injection valve for injecting chemicals and similar liquid substances into subsurface formations | — | 1992-08-25 |
| 5135050 | Device for collecting particulate matter and debris in horizontal or high-deviation oil or gas wells | — | 1992-08-04 |