Patents per Year
Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 8555956 | Linear induction motor-operated downhole tool | Anthony Veneruso, David McCalvin, Fabien Cens | 2013-10-15 | $35,594,000 |
| 8002040 | System and method for controlling flow in a wellbore | David McCalvin, Paul G. Goughnour, David Biddick, Russell A. Johnston | 2011-08-23 | $44,326,000 |
| 7360600 | Subsurface safety valves and methods of use | Thomas D. MacDougall | 2008-04-22 | $132,364,000 |
| 7347270 | Redundant hydraulic system for safety valve | Timothy J. McMillan | 2008-03-25 | $59,229,000 |
| 5947206 | Deep-set annulus vent valve | David McCalvin, Gregory Brock Stephenson | 1999-09-07 | |
| 4651822 | Dump and kill valve for a sidepocket mandrel | Russell A. Johnston | 1987-03-24 | $1,096,000 |