FIELD: oil and gas industry.
SUBSTANCE: invention is related to the dual bed operation in one well. The unit contains a packer, a long and a short flow string, two sucker-rod pumps, wellhead equipment and a ground-surface drive for pumps. The unit is equipped with a landing device of a separate type, a centraliser, a guide bushing, a conical plug, a packing V-ring. The body of a ball seal valve is made as a pipe with the inner bore and protrusion and includes a polished rod with torsions to connect rotors of the lower and upper sucker-rod pumps and a thrust bushing, a support ring, packing seals, a compression ring and a press bushing connected to the rod in series. The unit contains an automatic hitch mechanism which includes a protector, a sucker-rod hitch unit, a splined anchor and an adaptor. The unit contains a hydraulic discharger for product discharge. Screw-type pumps are used as sucker-rod pumps. The stator length is reduced per 500-750mm; the stator has a thread at the input side of the screw-type sucker-rod pump.
EFFECT: improving operational efficiency of the unit and reducing material costs.
3 cl, 17 dwg
