FIELD: engines and pumps.
SUBSTANCE: invention relates to pumps and can be used in production of deep-well pumps (DWP) intended for oil extraction from wells that feature high content of mineral salts and mechanical impurities in local waters. Proposed method consists in that polymer coat is applied onto work member surface to reduce salt deposition thereon. Note here that, prior to applying said coat, work member surface is subjected to physical-chemical treatment to prevent surface corrosion in direct contact with pumped medium.
EFFECT: higher reliability and longer life.
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