OIL FOR PUMPING ASSEMBLIES Russian patent published in 2010 - IPC C10M161/00 C10M137/04 C10M149/14 C10M145/14 C10M129/76 C10M129/10 

FIELD: chemistry.

SUBSTANCE: invention relates to compositions of petroleum oil used for lubricating friction bearings of oil-production equipment, particularly pumping assemblies used for pumping water and maintaining formation pressure during oil extraction. The oil contains the following in wt %: 4-methyl-2,6-di-tert-butyphenol 0.7-0.9; acid ester of alkenyl succinic acid 0.018-0.022; N-containing block-copolymer of ethylene and propylene oxides 0.018-0.022; tributylphosphate 0.5-1.5; polymethacrylate 0.6-1.0 and highly pure petroleum oil - the rest.

EFFECT: increased reliability and cost effectiveness of oil-production equipment, longer life of the oil.

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