Issued Patents 2018
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10125581 | Method and apparatus for bit run and retrieved casing hanger locking device | John E. Nelson | 2018-11-13 |
| 9982502 | Metal to metal annulus seal with enhanced lock-down capacity | John E. Nelson, Blake T. DeBerry | 2018-05-29 |