Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6394187 | Flapper valve assembly apparatus and method | Michael V. Vinzant, Paul Butler | 2002-05-28 |
| 6352118 | System and method for communication hydraulic control to a wireline retrievable downhole device | Dennis Kaminski | 2002-03-05 |
| 6119783 | Linear indexing apparatus and methods of using same | Charles D. Parker, Perry C. Shy, Leo G. Collins, John C. Gano | 2000-09-19 |
| 6003605 | Balanced line tubing retrievable safety valve | Nam V. Le | 1999-12-21 |
| 5996697 | Static wellhead plug | James Dan Vick, Jr., William R. Welch, Jayson Byrd | 1999-12-07 |
| 5988277 | Running tool for static wellhead plug | James Dan Vick, Jr., William R. Welch, Jayson Byrd | 1999-11-23 |
| 5957201 | Verification apparatus and method for a static wellhead plug | James Dan Vick, Jr., William R. Welch, Jayson Byrd | 1999-09-28 |
| 5875851 | Static wellhead plug and associated methods of plugging wellheads | James Dan Vick, Jr., William R. Welch, Jayson Byrd | 1999-03-02 |
| 5826661 | Linear indexing apparatus and methods of using same | Charles D. Parker, Perry C. Shy, Leo G. Collins, John C. Gano | 1998-10-27 |
| 5323859 | Streamlined flapper valve | Roddie R. Smith, Craig D. Hines | 1994-06-28 |
| 5318127 | Surface controlled annulus safety system for well bores | Craig D. Hines | 1994-06-07 |
| 5249630 | Perforating type lockout tool | Michael Wade Meaders | 1993-10-05 |
| 5179973 | Valve with pressure assisted closing system | Craig W. Godfrey, Kenneth L. Schwendemann, Timothy J. Noack | 1993-01-19 |
| 5137089 | Streamlined flapper valve | Roddie R. Smith, Craig D. Hines | 1992-08-11 |
| 5127476 | Lockout housing and sleeve for safety valve | Glenn R. Davis | 1992-07-07 |
| 5050839 | Valve | Craig W. Godfrey, Kenneth L. Schwendemann, Timothy J. Noack | 1991-09-24 |
| 4945993 | Surface controlled subsurface safety valve | Roddie R. Smith | 1990-08-07 |
| 4834183 | Surface controlled subsurface safety valve | Michael B. Vinzant, Craig D. Hines, Robert C. Hammett | 1989-05-30 |
| 4723606 | Surface controlled subsurface safety valve | Michael B. Vinzant, Phillip S. Sizer, Ronald K. Churchman, Roddie R. Smith | 1988-02-09 |
| 4632184 | Submersible pump safety systems | James B. Renfroe, Jr., Roger D. Rion | 1986-12-30 |
| 4624315 | Subsurface safety valve with lock-open system | Roddie R. Smith | 1986-11-25 |