Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6802379 | Liquid lift method for drilling risers | Charles R. Dawson, Sandra Hopko | 2004-10-12 |
| 5944195 | Method for separation of solids from drilling fluids by magnetic separation and centrifugation | Pin Y. Huang, Janardhan Davalath | 1999-08-31 |
| 5901795 | Well collision avoidance | Charles R. Dawson, David W. Ure | 1999-05-11 |
| H1568 | Acoustic separation of liquid hydrocarbons from wastewater | Pin Y. Huang | 1996-08-06 |
| 5508915 | Method to combine statistical and engineering techniques for stuck pipe data analysis | William E. Kline, Michele M. Thomas, Eugene A. Sikirica, Albert T. Wang, Marco Rasi | 1996-04-16 |
| 5258123 | Process for dewatering an aqueous solution containing solids using water-absorbent substances | Pin Y. Huang, Martin E. Ubelhor | 1993-11-02 |
| 4665996 | Method for reducing friction in drilling operations | Z. Andrew Foroulis | 1987-05-19 |
| 4519452 | Method of drilling and cementing a well using a drilling fluid convertible in place into a settable cement slurry | George G. Binder, Jr. | 1985-05-28 |
| 4445576 | Method of using a spacer for well control fluid | Evelyn N. Drake | 1984-05-01 |