Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8297380 | Casing and liner drilling shoes having integrated operational components, and related methods | Jack T. Oldham, L. Allen Sinor, Eric E. McClain, Robert A. Laing, Mark W. Dykstra +1 more | 2012-10-30 |
| 8225887 | Casing and liner drilling shoes with portions configured to fail responsive to pressure, and related methods | Jack T. Oldham, L. Allen Sinor, Eric E. McClain, Robert A. Laing, Mark W. Dykstra +1 more | 2012-07-24 |
| 8225888 | Casing shoes having drillable and non-drillable cutting elements in different regions and related methods | Jack T. Oldham, L. Allen Sinor, Eric E. McClain, Robert A. Laing, Mark W. Dykstra +1 more | 2012-07-24 |
| 8205693 | Casing and liner drilling shoes having selected profile geometries, and related methods | Jack T. Oldham, L. Allen Sinor, Eric E. McClain, Robert A. Laing, Mark W. Dykstra +1 more | 2012-06-26 |
| 8167059 | Casing and liner drilling shoes having spiral blade configurations, and related methods | Jack T. Oldham, L. Allen Sinor, Eric E. McClain, Robert A. Laing, Mark W. Dykstra +1 more | 2012-05-01 |
| 8056651 | Adaptive control concept for hybrid PDC/roller cone bits | Eric C. Sullivan | 2011-11-15 |
| 8006785 | Casing and liner drilling bits and reamers | Jack T. Oldham, L. Allen Sinor, Eric E. McClain, Robert A. Laing, Mark W. Dykstra +1 more | 2011-08-30 |
| 7395882 | Casing and liner drilling bits | Jack T. Oldham, L. Allen Sinor, Eric E. McClain, Robert A. Laing, Mark W. Dykstra +1 more | 2008-07-08 |
| 6021859 | Stress related placement of engineered superabrasive cutting elements on rotary drag bits | Gordon A. Tibbitts | 2000-02-08 |
| 5950747 | Stress related placement on engineered superabrasive cutting elements on rotary drag bits | Gordon A. Tibbitts | 1999-09-14 |
| 5787022 | Stress related placement of engineered superabrasive cutting elements on rotary drag bits | Gordon A. Tibbitts | 1998-07-28 |
| 5605198 | Stress related placement of engineered superabrasive cutting elements on rotary drag bits | Gordon A. Tibbitts | 1997-02-25 |