FIELD: engines and pumps.
SUBSTANCE: well jet plant incorporates an outer and inner strings. The outer string accommodates a jet pump and a packer. The jet pump casing has a pass with a seat and the channel feeding the medium to be pumped out communicating with the pass below the seat. The jet pump active nozzle communicates with the outer string above the seat. The jet pump diffuser communicates, on the outlet side, with the outer string hole space. The pass is arranged coaxial with the outer string to communicate with it. The channel feeding the medium to be pumped out incorporates a check valve and a limiter restraining the valve shut-off element travel relative to the seat. The inner string is furnished with a sealing element arranged on its lower end fitted into the string seat. The inner string and outer string form, above the seat, a circular channel feeding the working medium into the active nozzle. The inner string and the pass allows the flexible smooth logging pipe to enter the well below-parker space. The inner and outer strings diameters, those of the jet pump casing and flexible pipe and the operating well string inner diameter are interrelated in the range of from the wellhead to the jet pump location.
EFFECT: higher quality and higher efficiency of the plant.
1 dwg
