Issued Patents 2016
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9493986 | Gas injection while drilling | Benjamin Peter Jeffryes | 2016-11-15 |
| 9494028 | Measuring speed of rotation of a downhole motor | Michael Paul Barrett, Benjamin Peter Jeffryes, Walter David Aldred, Maurice Ringer | 2016-11-15 |
| 9404328 | Gas injection for managed pressure drilling | — | 2016-08-02 |
| 9303459 | Drilling apparatus | Benjamin Peter Jeffryes | 2016-04-05 |