Issued Patents All Time
Showing 26–39 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5884699 | Retrievable torque-through packer having high strength and reduced cross-sectional area | Bryon Mullen, Ralph H. Echols | 1999-03-23 |
| 5810083 | Retrievable annular safety valve system | — | 1998-09-22 |
| 5720343 | High temperature, high pressure retrievable packer | John C. Gano | 1998-02-24 |
| 5701954 | High temperature, high pressure retrievable packer | John C. Gano | 1997-12-30 |
| 5492173 | Plug or lock for use in oil field tubular members and an operating system therefor | Imre I. Gazda, David L. Reesing, John H. Yonker | 1996-02-20 |
| 5429190 | Slick line casing and tubing joint locator apparatus and associated methods | John J. Goiffon, Jack Gammill Clemens, David Russ Larimore | 1995-07-04 |
| 5415441 | Push-on coupling apparatus for tubular well completion structures | Colby M. Ross, Ralph H. Echols | 1995-05-16 |
| 5361838 | Slick line casing and tubing joint locator apparatus and associated methods | — | 1994-11-08 |
| 5163515 | Pumpdown toolstring operations in horizontal or high-deviation oil or gas wells | Roger Tailby, Joseph L. Pearce, John H. Yonker, Ronald K. Churchman, Jack Gammill Clemens | 1992-11-17 |
| 5152343 | Reeled tubing gas lift mandrel | — | 1992-10-06 |
| 5070941 | Downhole force generator | — | 1991-12-10 |
| 5069242 | Gas lift valve utilizing a diaphragm pilot | — | 1991-12-03 |
| 5012867 | Well flow control system | — | 1991-05-07 |
| 4360063 | Valve | — | 1982-11-23 |