Downhole sucker rod pumping unit for the extraction of high-viscosity oil

摘要

The invention relates to petroleum industry and can be used for borehole mining and heavy high-paraffin oils. Technical problems of the utility model is to feed for slaughter productive coolant reservoir to reduce the viscosity of the product and increase its inflow into the wellbore while maintaining drawdown, as well as increasing the diameter of the upper passage section of the discharge valve of the pump. The technical solution is that in the known apparatus including the column tubing and hollow rod, the two pumps of different diameter, the plungers are connected by a hollow rod, the side receiving the upper pump valve, the vertical channel inside the top of the pump plunger shank deflated prior to slaughter wells according utility model, the discharge valve of the upper pump located above the plunger and connects its column of hollow rods with the pump intake via a riser pipe, the upper end of which is transferable via a coaxial IR includes a sleeve with a central channel for upper layer production and lateral to the lower reservoir of products and the lower end through the eccentric sub is included in a box with a vertical channel for the production of the lower layer and a side channel for upper layer production, the plunger and the cylinder lower pump made bushing without shut-off valves. The Bible. 4, Figure 3.