Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6236620 | Integrated well drilling and evaluation | Roger L. Schultz, Paul D. Ringgenberg, J. Allan Clark, Kevin R. Manke | 2001-05-22 |
| 5555945 | Early evaluation by fall-off testing | Roger L. Schultz, Paul D. Ringgenberg, Ronald L. Hinkie | 1996-09-17 |
| 5540280 | Early evaluation system | Roger H. Schultz, Paul D. Ringgenberg | 1996-07-30 |
| 5152340 | Hydraulic set packer and testing apparatus | J. Allan Clark | 1992-10-06 |
| 5058674 | Wellbore fluid sampler and method | Roger L. Schultz, Kevin R. Manke | 1991-10-22 |
| 4883123 | Above packer perforate, test and sample tool and method of use | Gary D. Zunkel, Jon B. Christensen | 1989-11-28 |