| Application number | Title of the application | Filing Date | Status |
|---|
| 07/503496 | METHOD FOR DRILLING A WELL WITH EMULSION DRILLING FLUIDS | Mar 29, 1990 | Abandoned |
| 07/503411 | DRILLING FLUIDS | Mar 29, 1990 | Abandoned |
| 07/503489 | METHOD FOR DRILLING WELL | Mar 29, 1990 | Abandoned |
| 07/503497 | ALCOHOL-IN-OIL DRILLING FLUID SYSTEM | Mar 29, 1990 | Abandoned |
| 07/499789 | METHOD AND COMPOSITION FOR REDUCING THE PERMEABILITY OF A HIGH- PERMEABILITY ZONE IN AN OIL RESERVOIR | Mar 26, 1990 | Abandoned |
| 07/499819 | GELLABLE AQUEOUS COMPOSITION AND ITS USE IN ENHANCED PETROLEUM RECOVERY | Mar 26, 1990 | Abandoned |
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