Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 6182761 | Flowline extendable pigging valve assembly | — | 2001-02-06 | $743,478,000 |
| 6059039 | Extendable semi-clustered subsea development system | Mark A. Stair | 2000-05-09 | $315,605,000 |
| 5010956 | Subsea tree cap well choke system | — | 1991-04-30 | $65,891,000 |
| D306200 | Water meter replacement plug | — | 1990-02-20 | |
| 4615387 | Annular gas trap | Dale V. Johnson | 1986-10-07 | $102,149,000 |
| 4373582 | Acoustically controlled electro-mechanical circulation sub | Daniel P. Postler, Terry V. Jones | 1983-02-15 | $93,585,000 |
| 4367794 | Acoustically actuated downhole blowout preventer | Clifford W. Petersen | 1983-01-11 | $13,962,000 |
| 4314365 | Acoustic transmitter and method to produce essentially longitudinal, acoustic waves | Clifford W. Petersen, Edwin J. Hocker, Jr., David H. Gauger, James M. Henderson | 1982-02-02 | |
| 4272059 | Riser tensioner system | Jere A. Noerager, Daniel G. Taft | 1981-06-09 | $13,242,000 |