Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9249639 | Drilling fluid diverting sub | — | 2016-02-02 |
| 9051797 | Apparatus and method for dispensing chemicals into a well | — | 2015-06-09 |
| 9022114 | Cement shoe and method of cementing well with open hole below the shoe | — | 2015-05-05 |
| 7635027 | Method and apparatus for completing a horizontal well | Lloyd A. Hawthorne | 2009-12-22 |
| 4844161 | Locking orientation sub and alignment housing for drill pipe conveyed logging system | Donald E. Hensley, Martin L. Tomek | 1989-07-04 |
| 4799546 | Drill pipe conveyed logging system | Donald E. Hensley, Martin L. Tomek, David M. Moody | 1989-01-24 |
| 4790377 | Side entry sub well logging apparatus and method | — | 1988-12-13 |
| 4699216 | Blowout preventer for a side entry sub | — | 1987-10-13 |
| 4678038 | Side entry sub well logging apparatus and method | — | 1987-07-07 |
| 4428421 | Wireline winch mounting system | — | 1984-01-31 |
| 4392377 | Early gas detection system for a drill stem test | — | 1983-07-12 |
| 4278127 | Apparatus for retrieving drill collars | — | 1981-07-14 |