Issued Patents All Time
Showing 76–100 of 107 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8573304 | Eccentric safety valve | Jimmie R. Williamson, Jr., Bruce Edward Scott | 2013-11-05 |
| 8567506 | Fluid isolating pressure equalization in subterranean well tools | Jimmie R. Williamson, Jr. | 2013-10-29 |
| 8555986 | Actuation assembly and method for actuating a downhole tool | Jack Gammill Clemens, Wesley Neil Ludwig | 2013-10-15 |
| 8479826 | Protection of a safety valve in a subterranean well | — | 2013-07-09 |
| 8453749 | Control system for an annulus balanced subsurface safety valve | Jimmie R. Williamson, Jr. | 2013-06-04 |
| 8453748 | Subterranean well valve activated with differential pressure | Jimmie R. Williamson, Jr. | 2013-06-04 |
| 8342247 | Safety valve having mono spring closure mechanism | Jimmie R. Williamson, Jr., Leo G. Collins, Glenn R. Davis | 2013-01-01 |
| 8047294 | Dual flapper safety valve | Michael B. Vinzant, James M. Williams | 2011-11-01 |
| 8038120 | Magnetically coupled safety valve with satellite outer magnets | Jimmie R. Williamson, Jr. | 2011-10-18 |
| 7798229 | Dual flapper safety valve | Michael B. Vinzant, James M. Williams | 2010-09-21 |
| 7644767 | Safety valve with flapper/flow tube friction reducer | Frank D. Kalb, Jimmie R. Williamson, Jr. | 2010-01-12 |
| 7640989 | Electrically operated well tools | Jimmie R. Williamson, Jr. | 2010-01-05 |
| 7624807 | Deep set safety valve | — | 2009-12-01 |
| 7597151 | Hydraulically operated formation isolation valve for underbalanced drilling applications | Fredrick D. Curtis, Ronald E. Hyden, Michael Harvey, Jimmie R. Williamson, Jr. | 2009-10-06 |
| 7597149 | Safety valve with extension springs | Jimmie R. Williamson, Jr., Abram Serda Galindo | 2009-10-06 |
| 7434626 | Deep set safety valve | — | 2008-10-14 |
| 7213653 | Deep set safety valve | — | 2007-05-08 |
| 7021386 | Safety valve having extension spring closure mechanism | Leo G. Collins | 2006-04-04 |
| 6988556 | Deep set safety valve | — | 2006-01-24 |
| 6675894 | Metal to metal seal for use in well plugging applications, and associated methods | Robert Guyden | 2004-01-13 |
| 6547009 | Low profile static wellhead plug | — | 2003-04-15 |
| 6152219 | Downhole pulling tool | Mike L. Braby | 2000-11-28 |
| 6076600 | Plug apparatus having a dispersible plug member and a fluid barrier | David L. Reesing, Ewan Ogilvie Robb | 2000-06-20 |
| 6059038 | Auto-fill sub | — | 2000-05-09 |
| 5996697 | Static wellhead plug | Rennie L. Dickson, William R. Welch, Jayson Byrd | 1999-12-07 |