Schwertner; David
Patent Applications and Registrations
Patent applications and USPTO patent grants for Schwertner; David.The latest application filed is for "fluid loss control and sealing agent for drilling depleted sand formations".
- Schwertner; David - The Woodlands TX
| Patent | Date |
|---|---|
| Water-based drilling fluids using latex additives Grant 7,393,813 - Halliday , et al. July 1, 2 | 2008-07-01 |
| Fluid loss control and sealing agent for drilling depleted sand formations Grant 7,271,131 - Halliday , et al. September 18, 2 | 2007-09-18 |
| Fluid loss control and sealing agent for drilling depleted sand formations App 20040132625 - Halliday, William S. ; et al. | 2004-07-08 |
| Water-based drilling fluids using latex additives App 20040110644 - Halliday, William S. ; et al. | 2004-06-10 |
| Olefins and lubricants, rate of penetration enhancers, and spotting fluid additives for water-based drilling fluids Grant 5,851,958 - Halliday , et al. December 22, 1 | 1998-12-22 |
| Olefin isomers as lubricants, rate of penetration enhancers, and spotting fluid additives for water-based drilling fluids Grant 5,605,879 - Halliday , et al. February 25, 1 | 1997-02-25 |
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