Issued Patents All Time
Showing 26–39 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6112817 | Flow control apparatus and methods | Benn Voll, Michael H. Johnson | 2000-09-05 |
| 6097310 | Method and apparatus for mud pulse telemetry in underbalanced drilling systems | Andrew Brooks, Hatem Salem Morsy | 2000-08-01 |
| 6088294 | Drilling system with an acoustic measurement-while-driving system for determining parameters of interest and controlling the drilling direction | James V. Leggett, III, Vladimir Dubinsky, William Thomas Balogh, Paul Seaton, Andrew Brooks +1 more | 2000-07-11 |
| 6065538 | Method of obtaining improved geophysical information about earth formations | Nils Reimers, James V. Leggett, III, Paulo Tubel | 2000-05-23 |
| 6041860 | Apparatus and method for performing imaging and downhole operations at a work site in wellbores | Gregory R. Nazzal, Paulo Tubel, Gerald D. Lynde, James V. Leggett, III | 2000-03-28 |
| 6006844 | Method and apparatus for simultaneous coring and formation evaluation | Luc Van Puymbroeck, Michael H. Johnson, Pierre E. Collee | 1999-12-28 |
| 5995449 | Method and apparatus for improved communication in a wellbore utilizing acoustic signals | Robert Green | 1999-11-30 |
| 5869968 | Method and apparatus for avoiding mutual coupling between receivers in measurement while drilling | Andrew Brooks, MacMillian M. Wisler, Larry W. Thompson, Jian-Qun Wu, Wallace H. Meyer | 1999-02-09 |
| 5842149 | Closed loop drilling system | Vladimir Dubinsky, James V. Leggett, III | 1998-11-24 |
| 5679894 | Apparatus and method for drilling boreholes | Volker Kruger, Herbert W. Beimgraben | 1997-10-21 |
| 5667023 | Method and apparatus for drilling and completing wells | Michael H. Johnson, Daniel J. Turick, Larry Watkins | 1997-09-16 |
| 5373596 | Shoe stretching device | — | 1994-12-20 |
| 4390878 | Two receiver noise loggers | — | 1983-06-28 |
| 4355378 | Logging system depth recorder | Charles L. Dennis | 1982-10-19 |