Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5773390 | Chemical additive for removing solids from a well drilling system | Robert L. Sloan | 1998-06-30 |
| 5678631 | Process for removing solids from a well drilling system | Robert L. Sloan | 1997-10-21 |
| 5676763 | Process for cleaning pipe dope and other solids from well systems | Robert L. Sloan | 1997-10-14 |
| 5570742 | Tubular cleaning tool | J. Scott Reynolds, Robert L. Sloan | 1996-11-05 |
| 4735732 | Filtration control additive for invert emulsion drilling fluids and method of preparation | Dennis K. Clapper | 1988-04-05 |
| 4728444 | Filtration control additive for invert emulsion drilling fluids and method of preparation | Dennis K. Clapper | 1988-03-01 |
| 4663076 | Invert emulsion drilling fluid comprising oligamide composition | Dennis K. Clapper, Alphonse C. Perricone | 1987-05-05 |
| 4575428 | Invert emulsion drilling fluid comprising oligamide composition | Dennis K. Clapper, Alphonse C. Perricone | 1986-03-11 |