Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6543556 | Abnormal torque absorber for drilling | — | 2003-04-08 |
| 6308940 | Rotary and longitudinal shock absorber for drilling | — | 2001-10-30 |
| 5503228 | Jar apparatus and method of jarring | — | 1996-04-02 |
| 4846273 | Jar mechanism accelerator | Derrel D. Webb | 1989-07-11 |
| 4647085 | Sealing arrangement for pin and box threaded connection of tubular members | Derrel D. Webb | 1987-03-03 |
| 4606417 | Pressure equalized stabilizer apparatus for drill string | Derrel D. Webb | 1986-08-19 |
| 4552230 | Drill string shock absorber | Derrel D. Webb | 1985-11-12 |
| 4545444 | Jar mechanism energizer | Derrel D. Webb | 1985-10-08 |
| 4226289 | Independent one-way acting hydraulic jar sections for a rotary drill string | Derrel D. Webb | 1980-10-07 |