FIELD: oil and gas industry.
SUBSTANCE: jet well pump installation comprises housing that is provided with by-pass ports and insert with jet pump. The insert is provided with passages and seat for the sealing unit that has axial passage for cable connected with well instruments. The outlet passage is in communication with the space of the housing above the jet pump, and the insert is provided with sealing members. The housing receives the bearing bushing that can move in the axial direction and is spring-loaded with respect to the housing. The bearing bushing receives the insert with the jet pump. The bearing bushing has by-pass openings provided in the wall and bottom flange. The bore made in the housing underlies the by-pass ports. When the bearing bushing is in the bottom position, the passage for supplying active fluid is in communication with the space out of the housing through the by-pass openings. When the bearing bushing is in the top position the by-pass openings are overlapped by the bearing bushing.
EFFECT: expanded functional capabilities.
4 cl, 2 dwg
