Issued Patents 2011
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8020641 | Drill bit with continuously sharp edge cutting elements | Robert M. Welch, L. Allen Sinor | 2011-09-20 |
| 8006785 | Casing and liner drilling bits and reamers | Jack T. Oldham, L. Allen Sinor, Robert A. Laing, Evan C. Turner, Mark W. Dykstra +1 more | 2011-08-30 |
| 7954570 | Cutting elements configured for casing component drillout and earth boring drill bits including same | John C. Thomas, Sarvesh Tyagi, Jack T. Oldham, Lester I. Clark, William Heuser | 2011-06-07 |
| 7954571 | Cutting structures for casing component drillout and earth-boring drill bits including same | Michael L. Doster, John C. Thomas, Matthew R. Isbell, Jarod DeGeorge, Chad T. Jurica | 2011-06-07 |
| 7900703 | Method of drilling out a reaming tool | Lester I. Clark, John C. Thomas, Jeffrey B. Lund | 2011-03-08 |
| 7861809 | Rotary drag bit with multiple backup cutters | David Gavia, Ryan J. Hanford, Lane E. Snell, Jason E. Hoines, Matthew R. Isbell +1 more | 2011-01-04 |