Issued Patents All Time
Showing 26–50 of 54 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7878252 | Dual control line system and method for operating surface controlled sub-surface safety valve in a well | Richard C. Jones, Stuart M. Dennistoun | 2011-02-01 |
| 7775269 | Communication tool for accessing a non annular hydraulic chamber of a subsurface safety valve | Stuart M. Dennistoun, Imre I. Gazda | 2010-08-17 |
| 7751677 | Optical fiber feedthrough using axial seals for bi-directional sealing | James Dunphy, George Talmadge, John J. Grunbeck, Khai Tran | 2010-07-06 |
| 7677304 | Passable no-go device for downhole valve | — | 2010-03-16 |
| 7654333 | Downhole safety valve | — | 2010-02-02 |
| 7543651 | Non-elastomer cement through tubing retrievable safety valve | Nathaniel Wagner, George C. Duncan | 2009-06-09 |
| 7475733 | Communication tool for accessing a non annular hydraulic chamber of a subsurface safety valve | Stuart M. Dennistoun, Imre I. Gazda | 2009-01-13 |
| 7392849 | Balance line safety valve with tubing pressure assist | Donald P. Lauderdale, Richard Gledhill | 2008-07-01 |
| 7314091 | Cement-through, tubing retrievable safety valve | Nathaniel Wagner, George C. Duncan | 2008-01-01 |
| 7249635 | Communication tool for accessing a non annular hydraulic chamber of a subsurface safety valve | Stuart M. Dennistoun, Imre I. Gazda | 2007-07-31 |
| 7246668 | Pressure actuated tubing safety valve | — | 2007-07-24 |
| 7178599 | Subsurface safety valve | Robert J. Anderson, Nathaniel Wagner, John Hanton | 2007-02-20 |
| 7048065 | Method and apparatus for expandable liner hanger with bypass | Robert P. Badrak, Robert Coon, Patrick G. McGuire | 2006-05-23 |
| 7032672 | Subsurface safety valve having a communication tool accessible non annular hydraulic chamber | Stuart M. Dennistoun, Imre I. Gazda | 2006-04-25 |
| 6953093 | Communication tool for accessing a non annular hydraulic chamber of a subsurface safety valve | Stuart M. Dennistoun, Imre I. Gazda | 2005-10-11 |
| 6920934 | Method and apparatus for expandable liner hanger with bypass | Robert P. Badrak, Robert Coon, Patrick G. McGuire | 2005-07-26 |
| 6880641 | Subsurface safety valve and method for communicating hydraulic fluid therethrough | Stuart M. Dennistoun, Imre I. Gazda | 2005-04-19 |
| 6854519 | Subsurface valve with system and method for sealing | Thomas M. Deaton, Winfield M. Sides, III, Robert Jancha | 2005-02-15 |
| 6742595 | Subsurface safety valve lock out and communication tool and method for use of the same | Stuart M. Dennistoun, Imre I. Gazda | 2004-06-01 |
| 6659185 | Subsurface safety valve lock out and communication tool and method for use of the same | Stuart M. Dennistoun, Imre I. Gazda | 2003-12-09 |
| 6648075 | Method and apparatus for expandable liner hanger with bypass | Robert P. Badrak, Robert Coon, Patrick G. McGuire | 2003-11-18 |
| 6523614 | Subsurface safety valve lock out and communication tool and method for use of the same | Stuart M. Dennistoun, Imre I. Gazda | 2003-02-25 |
| 5323859 | Streamlined flapper valve | Craig D. Hines, Rennie L. Dickson | 1994-06-28 |
| 5284205 | Metal to metal seal for well safety valve | — | 1994-02-08 |
| 5137089 | Streamlined flapper valve | Craig D. Hines, Rennie L. Dickson | 1992-08-11 |