Issued Patents All Time
Showing 26–36 of 36 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6446720 | Methods of downhole testing subterranean formations and associated apparatus therefor | Paul D. Ringgenberg, Mark A. Proett, Michael T. Pelletier, Michael L. Hinz, Harold W. Nivens +1 more | 2002-09-10 |
| 6325146 | Methods of downhole testing subterranean formations and associated apparatus therefor | Paul D. Ringgenberg, Mark A. Proett, Michael T. Pelletier, Michael L. Hinz, Harold W. Nivens +1 more | 2001-12-04 |
| 5906354 | Ball valve for lethal gas or fluid service | Curry B. Walker | 1999-05-25 |
| 5626200 | Screen and bypass arrangement for LWD tool turbine | Martin L. Tomek | 1997-05-06 |
| 5483895 | Detonation system for detonating explosive charges in well | Martin L. Tomek | 1996-01-16 |
| 5375659 | Sonde supported operating system for control of formation production fluid flow | Martin L. Tomek, William B. King, Jerry R. Bennett, Perry C. Shy, William R. Welch | 1994-12-27 |
| 5230244 | Formation flush pump system for use in a wireline formation test tool | — | 1993-07-27 |
| 5211714 | Wireline supported perforating gun enabling oriented perforations | John W. Jordan, Martin L. Tomek, Larry Grigar, Terry L. Slagle | 1993-05-18 |
| 5040619 | Wireline supported perforating gun enabling oriented perforations | John W. Jordan, Martin L. Tomek, Larry Grigar, Terry L. Slagle | 1991-08-20 |
| 4879900 | Hydraulic system in formation test tools having a hydraulic pad pressure priority system and high speed extension of the setting pistons | — | 1989-11-14 |
| 4845982 | Hydraulic circuit for use in wireline formation tester | — | 1989-07-11 |