Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5272680 | Method of decoding MWD signals using annular pressure signals | Frederick A. Stone, Stephen Wallace | 1993-12-21 |
| 5222048 | Method for determining borehole fluid influx | Ali Abdallah | 1993-06-22 |
| 5163029 | Method for detection of influx gas into a marine riser of an oil or gas rig | Thomas M. Bryant, Arthur D. Hay | 1992-11-10 |
| 5124953 | Acoustic data transmission method | — | 1992-06-23 |
| 5055837 | Analysis and identification of a drilling fluid column based on decoding of measurement-while-drilling signals | Ali Abdallah | 1991-10-08 |
| 4878206 | Method and apparatus for filtering noise from data signals | Thomas M. Bryant, Mitchell S. Gershonowitz | 1989-10-31 |
| 4786874 | Resistivity sensor for generating asymmetrical current field and method of using the same | Allen Duckworth | 1988-11-22 |
| 4733232 | Method and apparatus for borehole fluid influx detection | — | 1988-03-22 |
| 4733233 | Method and apparatus for borehole fluid influx detection | G. Robert Feeley, Jr. | 1988-03-22 |
| 4676574 | Explosion and flame proof electrical connector protective assembly | Brian Vandellyn Park | 1987-06-30 |
| 4575681 | Insulating and electrode structure for a drill string | Charles W. Helm | 1986-03-11 |
| 4570123 | Electrode array for measurement of borehole resistivity | — | 1986-02-11 |