Issued Patents All Time
Showing 26–46 of 46 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4610465 | Structure and use of remotely releasable pile connectors | — | 1986-09-09 |
| 4605077 | Top drive drilling systems | — | 1986-08-12 |
| 4595062 | Well casing jack mechanism | Andrew B. Campbell | 1986-06-17 |
| 4535852 | Drill string valve actuator | Igor Krasnov | 1985-08-20 |
| 4529045 | Top drive drilling unit with rotatable pipe support | Igor Krasnov | 1985-07-16 |
| 4489794 | Link tilting mechanism for well rigs | — | 1984-12-25 |
| 4479547 | Well pipe jack | Andrew B. Campbell | 1984-10-30 |
| 4476936 | Jacking mechanism supported by a wellhead | Andrew B. Campbell | 1984-10-16 |
| 4465131 | Well casing jack mechanism | Andrew B. Campbell | 1984-08-14 |
| 4458768 | Top drive well drilling apparatus | — | 1984-07-10 |
| 4449596 | Drilling of wells with top drive unit | — | 1984-05-22 |
| 4446761 | Pipe spinning tool | Frederick A. Monahan | 1984-05-08 |
| 4437524 | Well drilling apparatus | Joseph Armand Picard | 1984-03-20 |
| 4437515 | Positioning of well pipe jack in a rig | Andrew B. Campbell | 1984-03-20 |
| 4421175 | Method of drilling and casing a well | Andrew B. Campbell | 1983-12-20 |
| 4421179 | Top drive well drilling apparatus | — | 1983-12-20 |
| 4405115 | Gripping jack system | — | 1983-09-20 |
| 4365676 | Method and apparatus for drilling laterally from a well bore | Andrew B. Campbell | 1982-12-28 |
| 4348920 | Well pipe connecting and disconnecting apparatus | — | 1982-09-14 |
| 4346631 | Well pipe spinning and torqueing apparatus | — | 1982-08-31 |
| 4203182 | Slip assembly | Jerry A. Gill | 1980-05-20 |