Thickened oil injection and recovery integrated complete device comprising all metal screw pump

Abstract

A thickened oil injection and recovery integrated device comprising an all metal screw pump comprises a polish rod assembly, a permanent magnet motor driving head protection device, a direct drive triphase permanent magnet synchronous motor, a high-temperature and high-pressure sealing assembly, a special steam injection device, a tubing head, a casing head, a surface casing, an oil tube, a torque rod, a torque anchor, a metal screw pump, a centralizer, a tail tube and a screw pump ground control cabinet; the polish rod assembly, the permanent magnet motor driving head protection device, the direct drive triphase permanent magnet synchronous motor, the high-temperature and high-pressure sealing assembly, the special steam injection device, the tubing head, the casing, the torque rod, the torque rod, the torque anchor, the centering guide and the tail tube are arranged from the top down sequentially; the oil tube is sleeved with the casing; the metal screw pump is mounted in the torque anchor; and the screw pump ground control cabinet is connected with the direct drive triphase permanent magnet synchronous motor. The device has the advantages that the device achieves steam injection with the pump, saves preparation time for steam injection and thermal recovery, prolongs a thermal recovery period, simplifies a steam injection huff and puff technology, shortens turnover and well occupation time, improves system efficiency and lowers production cost.

Description

technical field [0001] The invention relates to an oil recovery device, in particular to a heavy oil recovery device. Background technique [0002] At present, there are four types of injection-production pumps mainly used in heavy oil production. One is to inject gas through the oil outlet channel of the plunger, and the steam injection channel is the same as the oil extraction channel. The valve ball of the pump with this structure is suspended on the upper part of the valve ball seat with shear nails and shear rods to form a steam injection channel, and the structure is complex. The other is to inject gas through the outside of the pump barrel. In this structure, steam cannot be injected to the bottom of the well, which greatly reduces the effect of gas injection. The third is a series feedback pump. Before steam injection, the plunger must be lifted out of the pump barrel to operate cumbersome. At the same time, because the horizontal well is approximately vertical to ...

AI Technical Summary

Problems solved by technology

The valve ball of the pump with this structure is suspended on the upper part of the ball seat with shear nails and shear rods to form a steam injection channel, and the structure is complex

The other is to inject gas through the outside of the pump barrel. In this structure, steam cannot be injected to the bottom of the well, which greatly reduces the effect of gas injection. The third is a series feedback pump. Before steam injection, the plunger must be lifted out of the pump barrel to operate cumbersome

At the same time, because the horizontal well is approximately vertical to the ground, the fourth is to use surface-driven or submersible screw pumps. However, the stator of the currently produced screw pumps is a metal-lined rubber and the stator is an interference fit structure, which can easily cause dry wells with insufficient fluid supply. Abrasion damage, unable to meet high temperature in thermal recovery wells, rubber aging accelerates at high temperatures, not suitable for high temperature oil wells

None of these four pumps can be used in the horizontal section of horizontal wells, and they cannot be used in high-temperature wells and must be operated during steam injection, which is not suitable for the production of heavy oil.

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