COMPOSITION FOR PREVENTION OF HYDRATE SALT DEPOSITIONS AND CORROSION Russian patent published in 2014 - IPC C09K8/528 C23F11/14 

FIELD: oil-and-gas industry.

SUBSTANCE: proposed composition comprises surfactant, alcohol and mineralised water. Additionally it includes the following polymer: copolymer or pyrrolidone or caprolactam, thermo polymer based on N-vinyl-2-pyrrolidone, polyacrylamide, hydrolysed polyacrilonitrole, polypropylene glycol, polyoxipropylenepolyol, dimethylaminoethyl methacrylate. Besides, it includes Laprol-grade ester and hydroxyethylcellulose. It includes salt deposition inhibitor Substituted aminopolycarbonic or phosphonic acid, disodium salt of ethylenediaminetetraacetic acid and sodium salt of aminomethylen phosphonic acid, sodium hexametaphosphate or tripolyphosphate, ammonium chloride or phosphate. It includes also alcohol as the mix of formalin or urotropin(e), or carbamide-formaldehyde concentrate. Also, it contains monohydric alcohol C₁-C₄, still(age) bottoms of the production of butyl alcohols by oxosynthesis. Plus, diatomic C₁-C₃, low-molecular polyethylenglycol and polyglycol Glycol-1; polyatomic alcohol. Plus, glycerin and polyglycerin at the following ratio of components, wt %: surfactant - 0.1-3.0, aforesaid polymer - 0.02-3.0, said inhibitor - 0.1-3.0, said mix - 5.0-30.0, mineralised water making the rest.

EFFECT: higher inhibiting ability.

15 ex, 1 tbl