| abstract |
Non-aqueous wellbore safeguards liquid, including rheology modifier, and wherein rheology modifier includes the reaction product of polysulfide, dimeric dibasic acid and polyfunctional amine.The method of oil field operation is carried out, including the oil-base mud including rheology modifier is placed in wellbore, wherein rheology modifier includes the reaction product of polysulfide, dimeric dibasic acid and polyfunctional amine. |