FIELD: drilling of wells.
SUBSTANCE: in general, invention area relates to devices for oil and gas wells and, in particular, to coating, applied on surface of components of centrifugal pump of pumping systems for oil and gas wells. Centrifugal pump comprises at least one diffuser. It has outer surface intended for contact with fluid medium of oil and gas well. There is also at least one impeller. It has outer surface intended for contact with fluid medium of oil and gas well, and coating. Coating is formed on at least part of diffuser outer surface or impeller outer surface, or both. There is a combination of solid particles and a metal matrix. Said solid particles contain diamond particles with diameter of 0.5–4 mcm at concentration of 25–50 % by volume. Metal matrix contains nickel and boron or phosphorus. Phosphorus has concentration of 6–12 % by volume.
EFFECT: technical result is increased service life of centrifugal pumps due to reduced wear.
11 cl, 7 dwg
