Dillard; Walter Scott
Patent Applications and Registrations
Patent applications and USPTO patent grants for Dillard; Walter Scott.The latest application filed is for "annular isolation device for managed pressure drilling".
- Dillard; Walter Scott - Houston TX
| Patent | Date |
|---|---|
| Annular isolation device for managed pressure drilling Grant 10,012,044 - Leba , et al. July 3, 2 | 2018-07-03 |
| Annular Isolation Device For Managed Pressure Drilling App 20160138352 - LEBA; John Vinh ; et al. | 2016-05-19 |
| Roller Cone Drill Bit That Includes Components With Planar Reference Surfaces For Gauging And Inspection App 20080006447 - Dillard; Walter Scott ; et al. | 2008-01-10 |
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