Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4754819 | Method for improving cuttings transport during the rotary drilling of a wellbore | — | 1988-07-05 |
| 4719977 | Method of drilling deviated wellbores | — | 1988-01-19 |
| 4697651 | Method of drilling deviated wellbores | — | 1987-10-06 |
| 4646855 | Method for raising and lowering a drill string in a wellbore during drilling operations | — | 1987-03-03 |
| 4643264 | Method for reducing drilling torque in the drilling of a deviated wellbore | — | 1987-02-17 |
| 4577700 | Method and system for displacing drilling fluid from a drill string in a well drilling system | William G. Boston, James H. Sexton, Robert T. Strong | 1986-03-25 |
| 4577701 | System of drilling deviated wellbores | Wilton Gravley | 1986-03-25 |
| 4573540 | Method for drilling deviated wellbores | Eugene A. Hoppe, Charles E. Jones | 1986-03-04 |
| 4431068 | Extended reach drilling method | Wilton Gravley | 1984-02-14 |
| 4428441 | Method and apparatus for reducing the differential pressure sticking tendency of a drill string | — | 1984-01-31 |
| 4386665 | Drilling technique for providing multiple-pass penetration of a mineral-bearing formation | — | 1983-06-07 |
| 4384483 | Preventing buckling in drill string | Wilton Gravley, John E. Walraven | 1983-05-24 |
| 4384616 | Method of placing pipe into deviated boreholes | — | 1983-05-24 |
| 4384625 | Reduction of the frictional coefficient in a borehole by the use of vibration | Wilbur F. Roper | 1983-05-24 |
| 4373592 | Rotary drilling drill string stabilizer-cuttings grinder | John W. Kelly | 1983-02-15 |
| 4246975 | Wellbore drilling technique using eccentric tool joints to mitigate pressure-differential sticking | — | 1981-01-27 |