Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5711383 | Cementitious well drilling fluids and methods | Garland W. Davis, Bobby J. King, Jiten Chatterji, David D. Onan, Patty L. Totten | 1998-01-27 |
| 5398758 | Utilizing drilling fluid in well cementing operations | David D. Onan, Bobby G. Brake | 1995-03-21 |
| 5383521 | Fly ash cementing compositions and methods | David D. Onan, Bobby G. Brake | 1995-01-24 |
| 5355954 | Utilizing drilling fluid in well cementing operations | David D. Onan, Bobby G. Brake | 1994-10-18 |
| 5332041 | Set-activated cementitious compositions and methods | David D. Onan, Wendell D. Riley | 1994-07-26 |
| 5327968 | Utilizing drilling fluid in well cementing operations | David D. Onan, Patty L. Totten, Bobby G. Brake, Bobby J. King | 1994-07-12 |
| 5295543 | Converting drilling fluids to cementitious compositions | David D. Onan, Patty L. Totten, Bobby J. King | 1994-03-22 |
| 5168928 | Preparation and use of gelable silicate solutions in oil field applications | Edward F. Vinson | 1992-12-08 |
| 5049288 | Set retarded cement compositions and methods for well cementing | Lance E. Brothers, Donald W. Lindsey | 1991-09-17 |
| 4941536 | Set retarded cement compositions and methods for well cementing | Lance E. Brothers, Donald W. Lindsey | 1990-07-17 |