Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10113363 | System and related methods for control of a directional drilling operation | — | 2018-10-30 |
| 9458679 | Apparatus and method for damping vibration in a drill string | William Evans Turner, Mark Hutchinson, Dirk Bosman, Mark Ellsworth Wassell, Carl Allison Perry | 2016-10-04 |
| 9279903 | Apparatus for measuring bending on a drill bit operating in a well | Mark Ellsworth Wassell, Carl Allison Perry | 2016-03-08 |
| 8397562 | Apparatus for measuring bending on a drill bit operating in a well | Mark Ellsworth Wassell, Carl Allison Perry | 2013-03-19 |
| 7762356 | Rotary steerable motor system for underground drilling | William Evans Turner, Carl Allison Perry, Mark Ellsworth Wassell, Jason R. Barbely, Daniel E. Burgess | 2010-07-27 |
| 7681663 | Methods and systems for determining angular orientation of a drill string | — | 2010-03-23 |
| 7389830 | Rotary steerable motor system for underground drilling | William Evans Turner, Carl Allison Perry, Mark Ellsworth Wassell, Jason R. Barbely, Daniel E. Burgess | 2008-06-24 |
| 5242020 | Method for deploying extendable arm for formation evaluation MWD tool | — | 1993-09-07 |
| 5034929 | Means for varying MWD tool operating modes from the surface | Walter A. Helm | 1991-07-23 |
| 4894923 | Method and apparatus for measurement of azimuth of a borehole while drilling | Richard D. DiPersio, Edmund M. Hamlin | 1990-01-23 |
| 4813274 | Method for measurement of azimuth of a borehole while drilling | Richard D. DiPersio | 1989-03-21 |
| 4761889 | Method for the detection and correction of magnetic interference in the surveying of boreholes | Frederick A. Stone, Edmund M. Hamlin | 1988-08-09 |
| 4716973 | Method for evaluation of formation invasion and formation permeability | — | 1988-01-05 |
| 4647853 | Mud turbine tachometer | — | 1987-03-03 |