Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4610161 | Method and apparatus for determining fluid circulation conditions in well drilling operations | Jerry M. Speers | 1986-09-09 |
| 4553429 | Method and apparatus for monitoring fluid flow between a borehole and the surrounding formations in the course of drilling operations | John L. Evans, Jerry M. Speers | 1985-11-19 |