Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7011157 | Method and apparatus for cleaning a fractured interval between two packers | David Milton Eslinger, Randolph J. Sheffield, L. Michael McKee | 2006-03-14 |
| 6776239 | Tubing conveyed fracturing tool and method | David Milton Eslinger, Stephen D. Hill, Randolph J. Sheffield, Howard L. McGill | 2004-08-17 |
| 6533037 | Flow-operated valve | David Milton Eslinger, Howard L. McGill, Randolph J. Sheffield, Warren Zemlak | 2003-03-18 |
| 6439313 | Downhole machining of well completion equipment | Hubertus V. Thomeer, Randolph J. Sheffield, David Milton Eslinger, Marc Allcorn, Mark Callister Oettli | 2002-08-27 |
| 6425443 | Pressure compensated disconnect system and method | Stephen D. Hill, David Milton Eslinger, Mark Callister Oettli, Randolph J. Sheffield | 2002-07-30 |