Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10487950 | Blowout preventer having rotation-operated portion | — | 2019-11-26 |
| 10233716 | Blowout preventer including blind seal assembly | Johannes Van Wijk | 2019-03-19 |
| 9957768 | Subsea pressure reduction system | Johannes Van Wijk, David J. McWhorter, Edward C. Gaude | 2018-05-01 |
| 9822604 | Pressure variance systems for subsea fluid injection | Johannes Van Wijk | 2017-11-21 |
| 9789932 | System and method for installing suction piles | Johannes Van Wijk | 2017-10-17 |
| 9222326 | Subsea pressure delivery system | Gerrit Kroesen, Roger Boisjolie, Donald Scott Coonrod, Edmund A. Fisher | 2015-12-29 |
| 9140090 | Subsea pressure reduction system | Johannes Van Wijk, David J. McWhorter, Edward C. Gaude | 2015-09-22 |
| 8733090 | Methods and systems for subsea electric piezopumps | Don Coonrod, Gerrit Kroesen, Ronald Wayne Webb, Mac M. Kennedy, Katherine Harvey +3 more | 2014-05-27 |
| 8640775 | Multi-deployable subsea stack system | Johnnie E. Kotrla, David J. McWhorter, Glenn J. Chiasson | 2014-02-04 |
| 8365830 | Multi-deployable subsea stack system | Johnnie E. Kotrla, David J. McWhorter, Glenn J. Chiasson | 2013-02-05 |
| 7921917 | Multi-deployable subsea stack system | Johnnie E. Kotrla, David J. McWhorter, Glenn J. Chiasson | 2011-04-12 |
| 7637474 | Fluid saving blowout preventer operator system | John T. Mangan, David J. McWhorter | 2009-12-29 |
| 7559523 | Dual-cylinder blowout preventer operator system | John T. Mangan | 2009-07-14 |
| 7533865 | Blowout preventer operator locking system | John T. Mangan | 2009-05-19 |
| 7374146 | Dual-cylinder blowout preventer operator system | John T. Mangan | 2008-05-20 |
| 7338027 | Fluid saving blowout preventer operator system | John T. Mangan, David J. McWhorter | 2008-03-04 |
| 7300033 | Blowout preventer operator locking system | John T. Mangan | 2007-11-27 |
| 6719262 | Bidirectional sealing blowout preventer | Paul L. Tasson, Bolie C. Williams, III | 2004-04-13 |
| 5918851 | Blowout preventer ram automatic locking system | — | 1999-07-06 |
| 5575452 | Blowout preventer with ram wedge locks | Frank L. Sklenka, David L. O'Donnell | 1996-11-19 |
| 5505426 | Hydraulically controlled blowout preventer | David L. O'Donnell, Tri C. Le | 1996-04-09 |
| 5400857 | Oilfield tubular shear ram and method for blowout prevention | David L. O'Donnell | 1995-03-28 |
| 5025708 | Actuator with automatic lock | Denzil B. Smith | 1991-06-25 |
| 4715456 | Slips for well pipe | Frank E. Poe, Jr., Dan R. Schwertner, Cooper L. Dunn | 1987-12-29 |