FIELD: pump engineering.
SUBSTANCE: jet well pump installation comprises packer with central passage and jet pump whose housing is provided with passage for supplying fluid to the nozzle and passage for supplying fluid to be pumped from the well. The outlet of the diffuser of the jet pump is connected with the space downstream of pipes. The nozzle of the jet pump and passage for supplying fluid to be pumped are connected with the inner space of the tube column through the passage for supplying fluid and through the passage inlet, respectively. The housing of the jet pump receives flow distributor made of spring-loaded bearing bushing. The bearing bushing is provided with by-pass openings and seat for sealing unit with opening for cable. In the initial position, the passages for supply of fluid and supply of fluid to be pumped are overlapped by means of bearing bushing when it is in the top position, and when it is in the bottom position its top face underlies the inlet opening of the passage for supplying fluid. The by-pass openings of the bearing bushing are in communication with the inlet of the passage for supplying fluid to be pumped.
EFFECT: enhanced reliability.
2 cl, 3 dwg
