Issued Patents All Time
Showing 1–25 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10577914 | Optimizing performance of a drilling assembly | Patricia Astrid, Abhay Kumar Singh, John Edward Huhman, Matthew Alan Stoever, Rob Hendrikus Gerardus Marinus Grauwmans +1 more | 2020-03-03 |
| 9938816 | Optimizing performance of a drilling assembly | Patricia Astrid, Abhay Kumar Singh, John Edward Huhman, Matthew Alan Stoever, Rob Hendrikus Gerardus Marinus Grauwmans +1 more | 2018-04-10 |
| 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, Evan C. Turner +1 more | 2012-10-30 |
| 8296114 | System, program product, and related methods for bit design optimization and selection | Umesh Prasad, Paul E. Pastusek, Michael L. Doster | 2012-10-23 |
| 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, Evan C. Turner +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, Evan C. Turner +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, Evan C. Turner +1 more | 2012-06-26 |
| 8172008 | Drilling apparatus with reduced exposure of cutters and methods of drilling | William Heuser, Michael L. Doster, Theodore E. Zaleski, Jr., Jack T. Oldham, Terry D. Watts +3 more | 2012-05-08 |
| 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, Evan C. Turner +1 more | 2012-05-01 |
| 8066084 | Drilling apparatus with reduced exposure of cutters and methods of drilling | William Heuser, Michael L. Doster, Theodore E. Zaleski, Jr., Jack T. Oldham, Terry D. Watts +3 more | 2011-11-29 |
| 8006785 | Casing and liner drilling bits and reamers | Jack T. Oldham, L. Allen Sinor, Eric E. McClain, Robert A. Laing, Evan C. Turner +1 more | 2011-08-30 |
| 7814990 | Drilling apparatus with reduced exposure of cutters and methods of drilling | William Heuser, Michael L. Doster, Theodore E. Zaleski, Jr., Jack T. Oldham, Terry D. Watts +3 more | 2010-10-19 |
| 7395882 | Casing and liner drilling bits | Jack T. Oldham, L. Allen Sinor, Eric E. McClain, Robert A. Laing, Evan C. Turner +1 more | 2008-07-08 |
| 7096978 | Drill bits with reduced exposure of cutters | William Heuser, Michael L. Doster, Theodore E. Zaleski, Jr., Jack T. Oldham, Terry D. Watts +3 more | 2006-08-29 |
| 7000715 | Rotary drill bits exhibiting cutting element placement for optimizing bit torque and cutter life | Lawrence Allen Sinor, Christopher C. Beuershausen, Roger Fincher, Roland Illerhaus, Rudolf Carl Pessier | 2006-02-21 |
| 6935441 | Drill bits with reduced exposure of cutters | William Heuser, Michael L. Doster, Theodore E. Zaleski, Jr., Jack T. Oldham, Terry D. Watts +3 more | 2005-08-30 |
| 6883623 | Earth boring apparatus and method offering improved gage trimmer protection | Ronny D. McCormick, Mumtaz Ball, Mark E. Anderson, Michael L. Doster, Matthew R. Isbell | 2005-04-26 |
| 6779613 | Drill bits with controlled exposure of cutters | William Heuser, Michael L. Doster, Theodore E. Zaleski, Jr., Jack T. Oldham, Terry D. Watts +3 more | 2004-08-24 |
| 6460631 | Drill bits with reduced exposure of cutters | William Heuser, Michael L. Doster, Theodore E. Zaleski, Jr., Jack T. Oldham, Terry D. Watts +3 more | 2002-10-08 |
| 6443249 | Rotary drill bits for directional drilling exhibiting variable weight-on-bit dependent cutting characteristics | Christopher C. Beuershausen, Roger Fincher, Roland Illerhaus, Steve R. Matson, James A. Norris +2 more | 2002-09-03 |
| 6408958 | Superabrasive cutting assemblies including cutters of varying orientations and drill bits so equipped | Matthew R. Isbell, Rudolf Carl Pessier, Michael L. Doster, William Heuser | 2002-06-25 |
| 6397958 | Reaming apparatus and method with ability to drill out cement and float equipment in casing | Christopher S. Charles, William Gregory Presley, Sean K. Berzas, Douglas J. Bobrosky, Mark E. Morris +2 more | 2002-06-04 |
| 6321862 | Rotary drill bits for directional drilling employing tandem gage pad arrangement with cutting elements and up-drill capability | Christopher C. Beuershausen, Robert J. Costo, Jr., Danny E. Scott, Rudolf Carl Pessier, Roland Illerhaus +3 more | 2001-11-27 |
| 6298930 | Drill bits with controlled cutter loading and depth of cut | L. Allen Sinor, Wayne R. Hansen, Craig H. Cooley, Gordon A. Tibbitts | 2001-10-09 |
| 6230828 | Rotary drilling bits for directional drilling exhibiting variable weight-on-bit dependent cutting characteristics | Christopher C. Beuershausen, Roger Fincher, Roland Illerhaus, Steve R. Matson, James A. Norris +2 more | 2001-05-15 |