Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4878180 | Method of evaluating the condition of tubular goods | James Edward Pickett, Norman R. Carlson | 1989-10-31 |
| 4825072 | Method and apparatus for determining well fluid flow velocity using a nonradioactive tracer | Donald W. Oliver, David P. Hollingsworth | 1989-04-25 |
| 4751461 | Method of locating and determining the extent of corrosion in tubular goods | Thomas W. Guettinger | 1988-06-14 |
| 4674328 | Method and apparatus for determining subsurface conditions using a tubing packoff tool | Richard M. Ward | 1987-06-23 |