Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9567820 | Tubular system for jet drilling | Zachary D. Pearl, William G. Buckman, Sr., Thomas N. Garmon | 2017-02-14 |
| 8267198 | Perforating and jet drilling method and apparatus | William G. Buckman, Sr., Zachary D. Pearl | 2012-09-18 |
| 8267199 | Perforating and jet drilling method and apparatus | William G. Buckman, Sr., Zachary D. Pearl | 2012-09-18 |
| 8196680 | Perforating and jet drilling method and apparatus | William G. Buckman, Sr., Zachary D. Pearl | 2012-06-12 |
| 6530437 | Multi-gradient drilling method and system | George H. Medley, Jr., William J. McDonald | 2003-03-11 |
| 5022471 | Deviated wellbore drilling system and apparatus | William J. McDonald | 1991-06-11 |
| 4991668 | Controlled directional drilling system and method | William A. Rehm, William J. McDonald, Curtis E. Leitko, Jr. | 1991-02-12 |
| 4936397 | Earth drilling apparatus with control valve | William J. McDonald | 1990-06-26 |
| 4880065 | Air motor operated rotary earth drilling tool | William J. McDonald, Michael R. Wasson, Curtis E. Leitko, Jr., Gerard T. Pittard | 1989-11-14 |
| 4858704 | Guided earth boring tool | William J. McDonald, Gerard T. Pittard, Michael R. Wasson, William Christian Herben | 1989-08-22 |
| 4828053 | Deviated wellbore drilling system and apparatus | William J. McDonald | 1989-05-09 |
| 4789032 | Orienting and circulating sub | William A. Rehm, William J. McDonald, Curtis E. Leitko, Jr. | 1988-12-06 |
| 4729675 | Downhole motor and bearing assembly | Kurt H. Trzeciak | 1988-03-08 |
| 4694913 | Guided earth boring tool | William J. McDonald, Gerard T. Pittard, Michael R. Wasson, William Christian Herben | 1987-09-22 |
| 4665997 | Pressure balanced bearing assembly for downhole motors | William J. McDonald | 1987-05-19 |
| 4632191 | Steering system for percussion boring tools | William J. McDonald, Gerard T. Pittard, John H. Cohen, Gregory C. Givler | 1986-12-30 |
| 4621698 | Percussion boring tool | Gerard T. Pittard, William J. McDonald, John H. Cohen, Gregory C. Givler | 1986-11-11 |
| 4496174 | Insulated drill collar gap sub assembly for a toroidal coupled telemetry system | William J. McDonald, David D. Nagel | 1985-01-29 |
| 4225000 | Down hole drilling motor with pressure balanced bearing seals | — | 1980-09-30 |