Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6666076 | Glide head with outer active rail | Zuxuan Lin | 2003-12-23 |
| 5042597 | Horizontal drilling method and apparatus | Thomas D. Trunk, Timothy D. Baseflug, Steve L. Cromwell, Grady A. Hickman, Ralph D. Nickel +1 more | 1991-08-27 |
| 4991668 | Controlled directional drilling system and method | William J. McDonald, William C. Maurer, Curtis E. Leitko, Jr. | 1991-02-12 |
| 4938298 | Directional well control | — | 1990-07-03 |
| 4789032 | Orienting and circulating sub | William J. McDonald, William C. Maurer, Curtis E. Leitko, Jr. | 1988-12-06 |
| 4415205 | Triple branch completion with separate drilling and completion templates | Donald W. Dareing, Edward T. Wood | 1983-11-15 |
| 4294593 | Drilling mud degasser apparatus and system | — | 1981-10-13 |
| 4253530 | Method and system for circulating a gas bubble from a well | Martin J. Sharki, Woodrow E. Renfro | 1981-03-03 |
| 4226726 | Desilter | — | 1980-10-07 |