Issued Patents All Time
Showing 1–25 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7775269 | Communication tool for accessing a non annular hydraulic chamber of a subsurface safety valve | Stuart M. Dennistoun, Roddie R. Smith | 2010-08-17 |
| 7475733 | Communication tool for accessing a non annular hydraulic chamber of a subsurface safety valve | Stuart M. Dennistoun, Roddie R. Smith | 2009-01-13 |
| 7249635 | Communication tool for accessing a non annular hydraulic chamber of a subsurface safety valve | Stuart M. Dennistoun, Roddie R. Smith | 2007-07-31 |
| 7032672 | Subsurface safety valve having a communication tool accessible non annular hydraulic chamber | Stuart M. Dennistoun, Roddie R. Smith | 2006-04-25 |
| 6953093 | Communication tool for accessing a non annular hydraulic chamber of a subsurface safety valve | Stuart M. Dennistoun, Roddie R. Smith | 2005-10-11 |
| 6918440 | Testing drill packer | Virgilio Garcia-Soule, Timothy R. Carlson, Chuck MacPhail | 2005-07-19 |
| 6880641 | Subsurface safety valve and method for communicating hydraulic fluid therethrough | Stuart M. Dennistoun, Roddie R. Smith | 2005-04-19 |
| 6742595 | Subsurface safety valve lock out and communication tool and method for use of the same | Stuart M. Dennistoun, Roddie R. Smith | 2004-06-01 |
| 6675891 | Apparatus and method for gravel packing a horizontal open hole production interval | Travis Hailey, Colby M. Ross, Robert L. Thurman, Robert C. Hammett, David Lord | 2004-01-13 |
| 6659185 | Subsurface safety valve lock out and communication tool and method for use of the same | Stuart M. Dennistoun, Roddie R. Smith | 2003-12-09 |
| 6523614 | Subsurface safety valve lock out and communication tool and method for use of the same | Stuart M. Dennistoun, Roddie R. Smith | 2003-02-25 |
| 6267180 | Packer releasing tool and method for releasing a packer assembly from a wellbore | Marion D. Kilgore, Dennis D. Rood | 2001-07-31 |
| 6070672 | Apparatus and method for downhole tool actuation | — | 2000-06-06 |
| 6035880 | Pressure activated switch valve | — | 2000-03-14 |
| 5492173 | Plug or lock for use in oil field tubular members and an operating system therefor | Marion D. Kilgore, David L. Reesing, John H. Yonker | 1996-02-20 |
| 5205355 | Subsurface safety valves and method and apparatus for their operation | Marion H. Gay, Phillip S. Sizer | 1993-04-27 |
| 5170845 | Subsurface safety valves and method and apparatus for their operation | Marion H. Gay, Phillip S. Sizer | 1992-12-15 |
| 4928761 | Two-way plugs for wells | Dannie R. Collins | 1990-05-29 |
| 4844160 | Parking mandrel | — | 1989-07-04 |
| 4842064 | Well testing apparatus and methods | — | 1989-06-27 |
| 4750560 | Device for releasably connecting well tools | — | 1988-06-14 |
| 4583592 | Well test apparatus and methods | Phillip S. Sizer | 1986-04-22 |
| 4540048 | Locking device for well tools | — | 1985-09-10 |
| 4487261 | Well completion and testing system | — | 1984-12-11 |
| 4286661 | Equalizing valve for use in a well tool string | — | 1981-09-01 |