FIELD: oil industry.
SUBSTANCE: invention relates to the oil industry and can be used for downhole production of high-viscosity and waxy oils. The installation contains strings of tubing and hollow rods, a plug-in pump with a rod and a lock support, a liner lowered to the bottom and fixed to the string of tubing. The column of hollow rods is connected to the rod of the plug-in pump by means of a transfer sleeve. In the lower part of the column of hollow rods, channels are made connecting the cavities of the columns of tubing and hollow rods.
EFFECT: design is simplified, the reliability of the sucker-rod pumping unit operation is increased.
1 cl, 2 dwg
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