Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8225878 | Method and apparatus for expanded liner extension using downhole then uphole expansion | Mark K. Adam, Dennis G. Jiral, Lance M. Rayne | 2012-07-24 |
| 8215409 | Method and apparatus for expanded liner extension using uphole expansion | Mark K. Adam, Dennis G. Jiral, Lance M. Rayne | 2012-07-10 |
| 7360592 | Compliant cladding seal/hanger | — | 2008-04-22 |
| 6964305 | Cup seal expansion tool | Steve Rosenblatt | 2005-11-15 |
| 6739391 | Surface deployed cement separation plug | — | 2004-05-25 |
| 6167963 | Removable non-metallic bridge plug or packer | Dennis E. Kroll, Yusheng Yuan | 2001-01-02 |
| 6131663 | Method and apparatus for positioning and repositioning a plurality of service tools downhole without rotation | David A. Henley | 2000-10-17 |
| 5806113 | Motion controlled cradle | Nancy McMahan | 1998-09-15 |
| 4915171 | Above packer perforate test and sample tool and method of use | — | 1990-04-10 |
| 4804044 | Perforating gun firing tool and method of operation | David S. Wesson, Flint R. George | 1989-02-14 |
| 4691779 | Hydrostatic referenced safety-circulating valve | Daniel Anderson Newman, Donald W. Winslow, Gary D. Zunkel | 1987-09-08 |
| 4458762 | Recloseable auxiliary valve | — | 1984-07-10 |
| 4452313 | Circulation valve | — | 1984-06-05 |
| 4421172 | Drill pipe tester and safety valve | — | 1983-12-20 |
| 4420045 | Drill pipe tester and safety valve | — | 1983-12-13 |
| 4319633 | Drill pipe tester and safety valve | Gerald D. Jackson, Burchus Q. Barrington | 1982-03-16 |
| 4319634 | Drill pipe tester valve | Burchus Q. Barrington | 1982-03-16 |
| 4295361 | Drill pipe tester with automatic fill-up | — | 1981-10-20 |