Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6182775 | Downhole jar apparatus for use in oil and gas wells | — | 2001-02-06 |
| 6062324 | Fluid operated vibratory oil well drilling tool | — | 2000-05-16 |
| 6050346 | High torque, low speed mud motor for use in drilling oil and gas wells | — | 2000-04-18 |
| 6035954 | Fluid operated vibratory oil well drilling tool with anti-chatter switch | — | 2000-03-14 |
| 5944100 | Junk bailer apparatus for use in retrieving debris from a well bore of an oil and gas well | — | 1999-08-31 |
| 5797454 | Method and apparatus for downhole fluid blast cleaning of oil well casing | — | 1998-08-25 |
| 5695009 | Downhole oil well tool running and pulling with hydraulic release using deformable ball valving member | — | 1997-12-09 |
| 5156223 | Fluid operated vibratory jar with rotating bit | — | 1992-10-20 |
| 4958691 | Fluid operated vibratory jar with rotating bit | — | 1990-09-25 |
| 4702325 | Apparatus and method for driving casing or conductor pipe | — | 1987-10-27 |
| 4662784 | Method of installing pipe strings through offshore drilling platforms already in place | — | 1987-05-05 |
| 4592422 | Casing hanger apparatus and method of installation therefor | — | 1986-06-03 |
| 4469182 | Method of installing a casing hanger | — | 1984-09-04 |
| 4462471 | Bidirectional fluid operated vibratory jar | — | 1984-07-31 |
| 4446932 | Hydrostatic shear pin | — | 1984-05-08 |
| 4258800 | Hinged conductor casing for deviated driving and method therefor | — | 1981-03-31 |