Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE42137 | Universal cementing plug | — | 2011-02-15 |
| 7775290 | Apparatus for radially expanding and plastically deforming a tubular member | David Paul Brisco, Brock Watson | 2010-08-17 |
| RE41508 | Universal cementing plug | — | 2010-08-17 |
| RE41117 | Universal cementing plug | — | 2010-02-16 |
| 7546881 | Apparatus for radially expanding and plastically deforming a tubular member | Sam S. Lloyd, Lev Ring, David Paul Brisco, Kevin Waddell, Robert Lance Cook +3 more | 2009-06-16 |
| 6622798 | Method and apparatus for maintaining a fluid column in a wellbore annulus | Henry E. Rogers, Grant Lynn Hartman | 2003-09-23 |
| 6196311 | Universal cementing plug | — | 2001-03-06 |
| 4683955 | Automatic fill-up floating apparatus | Lee W. Stepp, Morris G. Baldridge | 1987-08-04 |
| 4412559 | Dog locking sleeve | Steven G. Streich, R. Benton Nickles | 1983-11-01 |
| 4337010 | Inflatable grout seal | Bob L. Sullaway | 1982-06-29 |