INPUT DEVICE OF DEEP WELL PUMP Russian patent published in 2021 - IPC E21B43/38 E21B43/08 F04B47/00 

FIELD: mining industry.

SUBSTANCE: input device of a deep well pump is declared. The inlet device of the deep well pump includes concentrically arranged pipes, part of the outer pipe with suction holes and the lower part of the inner pipe with inlet holes are made with the possibility of communicating the well with the pump intake. The accumulation tank of mechanical impurities is made in the form of an extension of the external pipe from below. The outer pipe and the accumulation tank of mechanical impurities are separated above the inlet holes of the inner pipe by a partition with a lateral longitudinal branch pipe for communication. The suction holes of the outer pipe are located on one side and are made of a size that excludes the ingress of large mechanical impurities inside, forming a mechanical filter that is separated from the side branch pipe by longitudinal radial partitions to form a gas separation chamber. At the top of the gas separation chamber, there is a hole with a gas valve for releasing gas into the well. Part of the outer pipe with a filter and the gas separation chamber are connected from above by a branch pipe passing through one of the longitudinal partitions with an internal channel with a cross-section having an area at least three times smaller than the total cross-sectional area of the suction holes of the filter for gas separation in the gas separation chamber. The longitudinal branch pipe is made with lengths in the gas chamber sufficient for the accumulation of mechanical impurities during the entire inter-repair period, and with a volume sufficient to exclude the ingress of mechanical impurities into the inlet holes of the inner pipe.

EFFECT: effective separation of mechanical impurities regardless of the viscosity of the borehole fluid due to the presence of a filter at the inlet and minimizing gas ingress to the pump inlet due to its separation and discharge into the well.

3 cl, 4 dwg