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Priority to RO122449ApriorityCriticalpatent/RO94492B1/ro
Publication of RO94492B1publicationCriticalpatent/RO94492B1/ro
Fluidul de foraj, conform inventiei, este constituit din hidroxietilceluloza, monoetilenglicol-oxipropilat, sare de sodiu a acizilor humici, motorina, amestec de alchilarilsulfonat de sodiu si saruri alcaline ale acizilor humici de lignit, produs de reactie al diaminelor si poliamidelor alifatice cu acizi naftenici si cantitate necesara de apa dulce sau de mare si clorura de calciu pentru a realiza o greutate specifica de 1,04...1,36 kgf/dm3.
Copolymere acrylate acrylamide a bas poids moleculaire et procede pour empecher au moins en partie la formation de depots de sels issus de milieux aqueux