Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11111748 | Milling tools with a secondary attrition system | Manoj D. Mahajan, Charles H. Dewey, Walter E. Friedl, Christopher Kang Potter, Alan Fairweather +1 more | 2021-09-07 |
| 11002082 | Millable bit to whipstock connector | Charles H. Dewey, Tuan Nguyen, John E. Campbell, Shelton W. Alsup | 2021-05-11 |
| 10538983 | Milling tools with a secondary attrition system | Manoj D. Mahajan, Charles H. Dewey, Walter E. Friedl, Christopher Kang Potter, Alan Fairweather +1 more | 2020-01-21 |
| 10487606 | Balancing load on milling cutting elements | John E. Campbell, Shelton W. Alsup | 2019-11-26 |
| 10036209 | Cutting elements and bits for sidetracking | Shelton W. Alsup | 2018-07-31 |
| 9915098 | Systems for forming lateral wellbores | Shelton W. Alsup, Philip M. Gregurek | 2018-03-13 |
| 9617791 | Sidetracking system and related methods | Praful C. Desai | 2017-04-11 |
| 9605485 | Percussion drilling assembly and hammer bit with gage and outer row reinforcement | Angelo Spedale, Charles H. Dewey, Alan J. Marshall | 2017-03-28 |
| 9512680 | Coring bit to whipstock systems and methods | John E. Campbell, Charles H. Dewey, Robert Utter, Praful C. Desai | 2016-12-06 |
| 9347268 | System and method to facilitate the drilling of a deviated borehole | Charles Grigor, Joseph M. Crow | 2016-05-24 |
| 9228406 | Extended whipstock and mill assembly | John E. Campbell, Shelton W. Alsup | 2016-01-05 |
| 9206648 | Cementing whipstock apparatus and methods | Charles H. Dewey, John E. Campbell, Philip M. Gregurek | 2015-12-08 |
| 9004159 | High performance wellbore departure and drilling system | Shelton W. Alsup, Philip M. Gregurek | 2015-04-14 |
| 8997895 | System and method for coupling an impregnated drill bit to a whipstock | Philip M. Gregurek, Kenneth M. Nevlud, Charles H. Dewey, Michael G. Azar | 2015-04-07 |
| 8820437 | Cementing whipstock apparatus and methods | David L. Ervin, Charles H. Dewey, John E. Campbell, Philip M. Gregurek | 2014-09-02 |
| 8763729 | Percussion drilling assembly and hammer bit with gage and outer row reinforcement | Angelo Spedale, Charles H. Dewey, Alan J. Marshall | 2014-07-01 |
| 8739900 | System and method for coupling a drill bit to a whipstock | Philip M. Gregurek, Charles H. Dewey, Shelton W. Alsup | 2014-06-03 |
| 8657040 | Percussion drilling assembly and locking system therefor | Alan J. Marshall, James A. Simson | 2014-02-25 |
| 8651202 | Percussion drilling assembly having a floating feed tube | Lance D. Underwood, Jack Marshall, Charles H. Dewey, Kevin Edgar Harrington | 2014-02-18 |
| 8387725 | Percussion drilling assembly and hammer bit with gage and outer row reinforcement | Angelo Spedale, Charles H. Dewey, Alan J. Marshall | 2013-03-05 |
| 8312944 | Percussion hammer bit with a driver sub including a guide sleeve portion | Alan J. Marshall, Michael S. Krauel | 2012-11-20 |
| 7950475 | Percussion drilling assembly having a floating feed tube | Lance D. Underwood, Jack Marshall, Charles H. Dewey, Kevin Edgar Harrington | 2011-05-31 |
| 7748478 | Percussion drilling assembly and hammer bit with an adjustable choke | — | 2010-07-06 |
| 7353845 | Inline bladder-type accumulator for downhole applications | Lance D. Underwood | 2008-04-08 |