INHIBITOR AND REMOVER OF ASPHALTENE-TAR-PARAFFIN DEPOSITS Russian patent published in 1997 - IPC

FIELD: oil and gas production. SUBSTANCE: deposits in equipment of productive wells, collection, storage, and transport systems lead to lowered well productivity, elevated wear of equipment, and excessive power and material consumption. To prevent deposit formation and simultaneously to enlarge resource and choice of reagents for combating deposits, it is proposed to use as deposit inhibitor and remover inversion dispersion, that is, stabilized sludge from production of high-ash calcium sulfonate detergent-dispersing additive containing (in wt %): hydrocarbon phase, 10-30; calcium sulfonates, 20-30; calcium carbonate, 15-30; calcium hydroxide, 13- 20; and water 7-30. EFFECT: reduced cost of antideposit additive. 5 tbl