Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7234546 | Drilling and cementing casing system | Ray Vincent, Frank Koehrmann, George Givens, Christiaan D. Krauss, Edward T. Wood +1 more | 2007-06-26 |
| 6850068 | Formation resistivity measurement sensor contained onboard a drill bit (resistivity in bit) | Roland E. Chemali, Paul E. Pastusek, Rene Ritter, Martin Evans, Stanley T. Hewitt | 2005-02-01 |
| 6419033 | Apparatus and method for simultaneous drilling and casing wellbores | Detlef Hahn | 2002-07-16 |
| 6390201 | Method of creating a downhole sealing and hanging device | Robert Coon, Timothy John Frank | 2002-05-21 |
| 6196336 | Method and apparatus for drilling boreholes in earth formations (drilling liner systems) | Roger Fincher, Larry Watkins, Detlef Hahn | 2001-03-06 |
| 6032744 | Universal pipe and tubing injection apparatus and method | Philip Burge, Peter Fontana, Glenn Leroux | 2000-03-07 |
| 5890534 | Variable injector | Philip Burge, Peter Fontana | 1999-04-06 |
| 5875850 | Universal pipe and tubing injection apparatus and method | Philip Burge, Peter Fontana, Glenn Leroux | 1999-03-02 |
| 5845708 | Coiled tubing apparatus | Philip Burge, Peter Fontana | 1998-12-08 |
| 5823267 | Universal pipe and tubing injection apparatus and method | Philip Burge, Peter Fontana, Glenn Leroux | 1998-10-20 |
| 5738173 | Universal pipe and tubing injection apparatus and method | Philip Burge, Peter Fontana, Glenn Leroux | 1998-04-14 |
| 5205364 | Process and drilling equipment for sinking a well in underground rock formations | Rainer Juergens | 1993-04-27 |
| 4773489 | Core drilling tool for boreholes in rock | — | 1988-09-27 |
| 4485880 | Direct drive for deep-well drilling | — | 1984-12-04 |