Differences of American and Iranian gilsonite
Differences of American gilsonite and Iran gilsonite
A water base drilling fluid comprising water and Iran gilsonite, said iran gilsonite being prepared by reacting at a temperature between 210 softening point of at least 300 water soluble base compound for a period of time sufficient to achieve special gilsonite wherein the percent by weight of the components of said mixture is:
Sodium sulfite 15-20%
Water soluble base compound 5-10%.