Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7696131 | Diesel oil-based invert emulsion drilling fluids and methods of drilling boreholes | Kenneth Oyler, Kimberly Burrows, Don Siems, Jeff Kirsner | 2010-04-13 |
| 7439210 | Inhibitive water-based drilling fluid system and method for drilling sands and other water-sensitive formations | Ernest Len Grebe, David Carbajal | 2008-10-21 |
| 6290001 | Method and composition for sweep of cuttings beds in a deviated borehole | Rob Valenziano, Karl A. Lutgring | 2001-09-18 |