| 12429046 |
Long-stroke pumping unit |
Clark E. Robison, Jeffrey J. Lembcke, Victoria M. Pons, William Kevin Hall, John Edward Stachowiak, Jr. +3 more |
2025-09-30 |
| 12116992 |
Long-stroke pumping unit |
Clark E. Robison, Jeffrey J. Lembcke, Victoria M. Pons, William Kevin Hall, John Edward Stachowiak, Jr. +3 more |
2024-10-15 |
| 11781543 |
Long-stroke pumping unit |
Clark E. Robison, Jeffrey J. Lembcke, Victoria M. Pons, William Kevin Hall, John Edward Stachowiak, Jr. +3 more |
2023-10-10 |
| 11187064 |
Well pumping system with enclosed rod rotator |
Patricia L. Vines, Clark E. Robison |
2021-11-30 |
| 11174856 |
Apparatus and methods for counterbalancing a pumping unit |
Clark E. Robison, Jeffrey J. Lembcke, Ross E. MOFFETT, Bryan A. Paulet, Phillip Andrew Briggs +2 more |
2021-11-16 |
| 11098708 |
Hydraulic pumping system with piston displacement sensing and control |
Kenneth J. Schmitt, Clark E. Robison, Robert G. McDonald, James S. Trapani |
2021-08-24 |
| 10962000 |
Long stroke pumping unit |
Clark E. Robison, Sean M. Christian |
2021-03-30 |
| 10890175 |
Direct drive pumping unit |
Jeffrey J. Lembcke, William Kevin Hall, Clark E. Robison, Sean M. Christian |
2021-01-12 |
| 10844852 |
Long-stroke pumping unit |
Clark E. Robison, Jeffrey J. Lembcke, Victoria M. Pons, William Kevin Hall, John Edward Stachowiak, Jr. +3 more |
2020-11-24 |
| 10465494 |
Universal remote control system for hydrocarbon recovery tools |
Klaus Krems, Michael Wiedecke, Martin Helms |
2019-11-05 |
| 10400761 |
Long stroke pumping unit |
Clark E. Robison, William Kevin Hall, Sean M. Christian |
2019-09-03 |
| 10344573 |
Position sensing for wellsite pumping unit |
Clark E. Robison, Peri Sabhapathy |
2019-07-09 |
| 10196883 |
Long-stroke pumping unit |
Clark E. Robison, William C. Lane, Darius J. Yakimchuk, Jeffrey J. Lembcke, Bryan A. Paulet +3 more |
2019-02-05 |
| 10197050 |
Reciprocating rod pumping unit |
Clark E. Robison, Michael Gilbert Chavira, Luis Alberto Garcia, Jeffrey Wing Lun Seto, Michael C. Ramsey |
2019-02-05 |
| 10167707 |
Rod string rotation during well pumping operations |
James S. Trapani, Clark E. Robison, Jeffrey J. Lembcke, Kyle C. Brosch |
2019-01-01 |
| 10132126 |
Modular top drive |
Martin Helms, Martin Liess, Christian KIESS |
2018-11-20 |
| 10113544 |
Long-stroke pumping unit |
Clark E. Robison, Jeffrey J. Lembcke, Victoria M. Pons, William Kevin Hall, John Edward Stachowiak, Jr. +3 more |
2018-10-30 |