Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8056618 | Flapper mounted equalizer valve for subsurface safety valves | Gary B. Lake | 2011-11-15 |
| 7779907 | Downhole shock absorber with crushable nose | Anthony S. Coghill | 2010-08-24 |
| 7762335 | Switching apparatus between independent control systems for a subsurface safety valve | David Z. Anderson, Darren E. Bane, John E. Gunnells, Anthony S. Coghill, Allen P. Carney +3 more | 2010-07-27 |
| 7735560 | Distortion compensation for rod piston bore in subsurface safety valves | Darren E. Bane, David Z. Anderson, Clifford H. Beall, Gary B. Lake | 2010-06-15 |
| 7699108 | Distortion compensation for rod piston bore in subsurface safety valves | Darren E. Bane, David Z. Anderson, Clifford H. Beall, Gary B. Lake | 2010-04-20 |
| 7694742 | Downhole hydraulic control system with failsafe features | Darren E. Bane, David Z. Anderson, Aaron T. Jackson, Clifford H. Beall, Edward Welch | 2010-04-13 |
| 7637324 | Isolation valve for subsurface safety valve line | David Z. Anderson, Clifford H. Beall, Anthony S. Coghill | 2009-12-29 |
| 7552774 | Control line hydrostatic minimally sensitive control system | David Z. Anderson, Edward Welch, Darren E. Bane, Clifford H. Beall | 2009-06-30 |