Gear suspension and gear drive load balancing pumping unit

Abstract

The invention discloses a gear suspension and gear drive load balancing pumping unit, which is characterized by comprising a rack and a double-rack up-and-down drive device arranged on the rack, the double-rack up-and-down drive device comprises a polished rod lifting rack, a polished rod lifting guide rail, a rack guide rail and a drive gear, the drive gear is used for balancing and supporting two groups of oil extraction rod columns symmetrically arranged in a single well, so that the drive gear can drive the two lifting racks to move alternately up and down and balance the two groups of oilextraction rod columns, and a' balance type' variable load flexible balancing configuration structure is formed. The parallel double-pump underground oil extraction rod columns provided the inventionhave the same weight, oil extraction rods at the two sides sit on a seesaw at a suspension point, the static load of the suspension points of the double polished rods is approximately symmetrical, the mirror type double-suspension oil pumping unit only needs to play a "slight" inching lifting role, the effective power of a motor can be approximately regarded as being completely used for lifting well fluid, the installed power of the motor is smaller, the system efficiency is higher, and the "low carbon" lifting oil extraction is truly realized.

Description

technical field [0001] The invention relates to the technical field of oil exploitation, in particular to a gear-suspended gear-driven load-balanced oil pumping unit. Background technique [0002] Beam pumping unit lifting oil production has always been the dominant artificial lifting method in the world petroleum industry. Compared with other lifting methods, it has many advantages such as durability, high reliability in field conditions, convenient maintenance, high degree of standardization, and strong versatility. But at the same time, the beam pumping unit also has insurmountable "congenital deficiencies". Mainly: the technical advantages of "long-stroke, low-stroke" production parameters cannot be fully utilized, the balance principle problem and the load fluctuation characteristics of the suspension point lead to low load balance rate, the motor starts with heavy load, works with light load, the torque fluctuates greatly, and the up and down stroke Uneven load, even...

AI Technical Summary

Problems solved by technology

But at the same time, the beam pumping unit also has insurmountable "congenital deficiencies"

Mainly: the technical advantages of "long-stroke, low-stroke" production parameters cannot be fully utilized, the balance principle problem and the load fluctuation characteristics of the suspension point lead to low load balance rate, the motor starts with heavy load, works with light load, the torque fluctuates greatly, and the up and down stroke Uneven load, even negative torque, low efficiency and high energy consumption

Because the beam pumping unit does not fundamentally change the characteristics of the four-bar linkage transmission mechanism, it cannot fundamentally solve the shortcomings of "big horse-drawn carts" and high energy consumption.

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