Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6834726 | Method and apparatus to reduce downhole surge pressure using hydrostatic valve | David M. Haugen, David Hosie | 2004-12-28 |
| 6755252 | Downhole surge pressure reduction and filtering apparatus | Clayton Stanley Pluchek, Gerald Pedersen, Thad Scott, David M. Haugen | 2004-06-29 |
| 6719056 | Sand removal method | Corey Hoffman, Mike A. Luke, Stephen J. Norris | 2004-04-13 |
| 6695057 | Fracturing port collar for wellbore pack-off system, and method for using same | Gary Duron Ingram, Corey Hoffman | 2004-02-24 |