Issued Patents All Time
Showing 26–38 of 38 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4576236 | Perforation and isolation apparatus | John A. Nelson, John H. Crisp | 1986-03-18 |
| 4557331 | Well perforating method and apparatus | — | 1985-12-10 |
| 4543700 | Method of detachably securing an explosive charge container in a hollow carrier for a perforating device | John A. Nelson | 1985-10-01 |
| 4543703 | Method of field assembly of a selected number of shaped charges in a well casing perforating gun | Rodney J. Wetzel | 1985-10-01 |
| 4541486 | One trip perforating and gravel pack system | Rodney J. Wetzel | 1985-09-17 |
| 4526233 | Releasable coupling for tubing conveyed subterranean well perforating gun | — | 1985-07-02 |
| 4523649 | Rotational alignment method and apparatus for tubing conveyed perforating guns | — | 1985-06-18 |
| 4515217 | Perforating gun pressure activated sliding sleeve | — | 1985-05-07 |
| 4479556 | Subterranean well casing perforating gun | John A. Nelson | 1984-10-30 |
| 4423773 | Single acting subterranean well valve assembly with conduit fluid stripping means | — | 1984-01-03 |
| 4417858 | Plunger lift control | — | 1983-11-29 |
| 4399871 | Chemical injection valve with openable bypass | Joel E. Adkins, Russell A. Johnston | 1983-08-23 |
| 4265306 | Latch for well tools | — | 1981-05-05 |