Multichannel high efficiency oil-well pump

Abstract

This invention relates to a multi-channel oil-well pump which can be anchored. It comprises upper connector, outer cylinder, pump barrel and plunger piston, and the reducer union, tubing line pump bridge oil inlet duct, liquid commutator, brass pipe and upper connector are connected together; wherein said elements form the circular channel connecting to oil pipe, sucking liquid through the bridge oil inlet duct; the liquid commutator connects with the reducer union through the brass pipe, being another liquid discharging pipe; by increasing the discharging pipe, it can decrease the liquid pressure in the pump and the friction of pumping rod and oil line; the circular channel applies the force to the lower of the pump, creating anchor effect, by which can increase the effective stroke of oil-well pump.

Description

technical field [0001] The invention relates to an oil extraction process, and mainly relates to an integral tube type oil well pump connected to the downhole oil pipe of an oil pumping unit. Background technique [0002] In the actual production work of oil extraction in oil fields, there are a large number of problems of eccentric wear of oil pipes and sucker rods in pumping wells. Analyzing the reasons, it is realized that the working principle of the oil well pump is: (1) When the piston moves upward, the floating valve (discharge valve) is closed under the pressure of the liquid column in the oil pipe, and a section of the piston stroke length is discharged. At the same time, Due to the pressure drop in the pump, the liquid in the well will open the fixed valve (suction valve) and enter the pump under the pressure of the liquid column in the annular space of the oil casing to complete the suction process; (2) When the piston is moving down, the liquid in the pump is com...

AI Technical Summary

Problems solved by technology

[0004] During the usual production process of the oil well pump, due to the natural elastic elongation of the oil pipe string, the actual stroke of the oil well pump is affected by the elongation and shortening of the oil pipe string during the alternate operation of the up and down strokes of the oil pump unit, and the pump efficiency of the oil well pump cannot be obtained. better play

[0005] In order to solve the above problems, the method of installing a sucker rod centralizer is usually used to solve the problem of eccentric wear, because it relies on sacrificing the plastic convex part of the centralizer to slow down the wear between the sucker rod and the oil pipe. In actual work, there is still the problem of eccentric wear between the sucker rod and the tubing; the solution to the elongation and shortening of the tubing string is usually the method of running downhole tools such as anchor tiles, which may cause damage to the downhole casing. Certain damage, not easy to promote in a large area

Images