Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12392211 | Explosive downhole tools having improved wellbore conveyance and debris properties, methods of using the explosive downhole tools in a wellbore, and explosive units for explosive column tools | Walter Stam | 2025-08-19 |
| 12123272 | Methods of pre-testing expansion charge for selectively expanding a wall of a tubular, and methods of selectively expanding walls of nested tubulars | — | 2024-10-22 |
| 11781394 | Shaped charge assembly, explosive units, and methods for selectively expanding wall of a tubular | — | 2023-10-10 |
| 11781393 | Explosive downhole tools having improved wellbore conveyance and debris properties, methods of using the explosive downhole tools in a wellbore, and explosive units for explosive column tools | Walter Stam | 2023-10-10 |
| 11713637 | Dual end firing explosive column tools and methods for selectively expanding a wall of a tubular | — | 2023-08-01 |
| 11629568 | Shaped charge assembly, explosive units, and methods for selectively expanding wall of a tubular | — | 2023-04-18 |
| 11536104 | Methods of pre-testing expansion charge for selectively expanding a wall of a tubular, and methods of selectively expanding walls of nested tubulars | — | 2022-12-27 |
| 11480021 | Shaped charge assembly, explosive units, and methods for selectively expanding wall of a tubular | — | 2022-10-25 |
| 11473383 | Dual end firing explosive column tools and methods for selectively expanding a wall of a tubular | — | 2022-10-18 |
| 11015410 | Dual end firing explosive column tools and methods for selectively expanding a wall of a tubular | — | 2021-05-25 |
| 11002097 | Shaped charge assembly, explosive units, and methods for selectively expanding wall of a tubular | — | 2021-05-11 |
| 10538984 | Mini-severing and back-off tool with pressure balanced explosives | William T. Bell | 2020-01-21 |
| 10240421 | String shot back-off tool with pressure-balanced explosives | William T. Bell | 2019-03-26 |
| 10161197 | Well tool centralizer systems and methods | William T. Bell | 2018-12-25 |
| 10077617 | Well tool centralizer systems and methods | William T. Bell | 2018-09-18 |
| 10047591 | Apparatus and methods for shaped charge tubing cutters | William T. Bell | 2018-08-14 |
| 9879494 | High energy severing tool with pressure balanced explosives | William T. Bell | 2018-01-30 |
| 9657544 | Drill collar severing tool | William T. Bell | 2017-05-23 |
| 9435170 | High energy severing tool with pressure balanced explosives | William T. Bell | 2016-09-06 |
| 9428979 | Shaped charge casing cutter | William T. Bell | 2016-08-30 |
| 9038713 | Shaped charge casing cutter | William T. Bell | 2015-05-26 |
| 9022116 | Shaped charge tubing cutter | William T. Bell | 2015-05-05 |
| 8939210 | Drill collar severing tool | William T. Bell | 2015-01-27 |