Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9051787 | Quick connect coupling for cementing operations and the like | Douglas K. Baugher, Charles J. Pate, II, Kurt R. Koenig | 2015-06-09 |
| 8201634 | Subsea cementing plug system with plug launching tool | Kurt R. Koenig | 2012-06-19 |
| 7114558 | Filtered actuator port for hydraulically actuated downhole tools | Corey Hoffman, Jason Ellis | 2006-10-03 |
| 6666273 | Valve assembly for use in a wellbore | — | 2003-12-23 |
| 6622795 | Flow actuated valve for use in a wellbore | John E. Hebert, Joseph Boudreaux, Scott Darby | 2003-09-23 |
| 6571880 | Method and multi-purpose apparatus for control of fluid in wellbore casing | Charles Butterfield, Robert Bates, Samuel P. Hawkins, III, Burney J. Latiolais, Jr., Keith T. Lutgring | 2003-06-03 |
| 5967231 | Plug release indication method | Charles Butterfield, Stephen E. Tilghman | 1999-10-19 |
| 5829526 | Method and apparatus for placing and cementing casing in horizontal wells | Henry E. Rogers, Earl Webb, Grant Lynn Hartman, Kenneth G. Neal | 1998-11-03 |
| 5762139 | Subsurface release cementing plug apparatus and methods | Bobby L. Sullaway, George L. Morgan, David D. Szarka | 1998-06-09 |
| 5758726 | Ball drop head with rotating rings | Steven G. Streich | 1998-06-02 |
| 5722491 | Well cementing plug assemblies and methods | Bobby L. Sullaway | 1998-03-03 |
| 5718292 | Inflation packer method and apparatus | James F. Heathman | 1998-02-17 |
| 5566757 | Method and apparatus for setting sidetrack plugs in open or cased well bores | Robert B. Carpenter, Anthony M. Badalamenti, Jerry L. Logan | 1996-10-22 |
| 5544704 | Drillable whipstock | James F. Heathman, Kenneth P. Marcel | 1996-08-13 |
| 5488994 | Inflation packer method and apparatus | James F. Heathman, Kenneth P. Marcel | 1996-02-06 |
| 5413172 | Sub-surface release plug assembly with non-metallic components | — | 1995-05-09 |
| 5392852 | Sub-surface release plug assembly with primary and secondary release mechanisms | Steven N. Rolen | 1995-02-28 |
| 4791952 | Hydrant and components thereof | — | 1988-12-20 |
| 4790341 | Hydrant and components thereof | — | 1988-12-13 |
| 4770203 | Hydrant and components thereof | — | 1988-09-13 |
| 4763686 | Hydrant and components thereof | — | 1988-08-16 |