Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7977281 | Methods for minimizing the amount of graphite particles used during drilling operations | William S. Halliday, S. Dwight Strickland | 2011-07-12 |
| 7393813 | Water-based drilling fluids using latex additives | William S. Halliday, Tao Xiang, Dennis K. Clapper | 2008-07-01 |
| 7271131 | Fluid loss control and sealing agent for drilling depleted sand formations | William S. Halliday, Tao Xiang, Dennis K. Clapper | 2007-09-18 |
| 7087555 | Drilling fluids comprising sized graphite particles | William S. Halliday, S. Dwight Strickland | 2006-08-08 |
| 5851958 | Olefins and lubricants, rate of penetration enhancers, and spotting fluid additives for water-based drilling fluids | William S. Halliday | 1998-12-22 |
| 5605879 | Olefin isomers as lubricants, rate of penetration enhancers, and spotting fluid additives for water-based drilling fluids | William S. Halliday | 1997-02-25 |