Patent ID: 8741816
Filing Date: 2014-06-03
Classification: C09K,Y10S

Abstract:
1. A method for treatment of well bore tar comprising: contacting tar resident in a well bore with an aqueous-based treatment fluid comprising a tar stabilizing polymer comprising a copolymer of styrene co-monomers wherein the copolymer of styrene co-monomers comprises the styrene co-monomers in an amount in the range of about 99% to about 100% by weight, wherein the copolymer of styrene co-monomers is essentially free of acrylate and acrylic acid, and wherein the tar stabilizing polymer is dispersed in the aqueous-based treatment fluid as a latex emulsion or a powder; and allowing the aqueous-based treatment fluid to interact with the tar to at least partially reduce the tendency of the tar to adhere to a surface; and after the aqueous-based treatment fluid has interacted with the tar, the tar is removed from the well bore by filtering the tar from the aqueous-based treatment fluid.