Improved automatic control hydraulic drive oil pumping machine

Abstract

The invention discloses an improved automatic control hydraulic drive oil pumping machine. A machine base is fixedly provided with an upright hydraulic cylinder and a support frame; the top part of a piston rod of the hydraulic cylinder is provided with a moving pulley; an upper platform of the support frame is provided with a chain wheel, and the outer side of the upper platform is hinged with afront platform with a guide chain wheel; a lifting oil cylinder is hinged with the machine base, and a piston rod of the lifting oil cylinder is hinged with the front platform; one end of wire rope is connected with a wire rope adjuster, and the other end is connected with the bottom part of a balancing tank by the moving pulley of the hydraulic cylinder through a fixed pulley of the machine base; a chain connected with the top part of the balancing tank is connected with a polished rod eye by the chain wheel and the guide chain wheel; an oil channel between a variable oil pump on the hydraulic circuit and the hydraulic cylinder is provided with a liquid control reversing valve, a one-way throttle valve, a hand operated reversing valve, an electromagnetic valve and a three-way rotary diskvalve in sequence, and the oil charging channel and the oil discharging channel of the hydraulic cylinder are connected with the lifting oil cylinder by the three-way rotary disk valve respectively. The oil pumping machine is small in volume, low in energy consumption, good in energy saving effect, reliable in performance and convenient in use, and can conveniently solve a space problem for well repair without moving the main machine during well repair.

Description

technical field [0001] The invention belongs to oil exploitation equipment, in particular to an improved automatic control hydraulic transmission pumping unit. Background technique [0002] At present, the pumping equipment used for oilfield exploitation generally adopts the traditional mechanical transmission pumping unit. However, its structure is huge and heavy, and it is difficult to adjust the stroke and adjust the balance. Oilfields generally use long-stroke oil well pumps to improve efficiency. Due to structural problems, large horse-drawn carts are used to increase the stroke of mechanically driven oil pump units in order to meet the needs of long-stroke oil well pumps, which greatly increases power consumption and low power transmission efficiency. At present, a hydraulic transmission pumping unit has been developed. Its structure is: a hydraulic cylinder is fixed horizontally on the frame, a movable pulley is installed at the end of the piston rod, and one end of ...

AI Technical Summary

Problems solved by technology

The stroke control rod installed on the side of the hydraulic cylinder is equipped with symmetrical stoppers. The motorized reversing valve on the hydraulic control circuit cooperates with the stoppers, and hydraulic transmission is used instead of mechanical transmission. Its structure is relatively compact and its weight is light. It can reduce the manufacturing cost, but the horizontally fixed hydraulic cylinder occupies a large area, the piston rod and the lip of the cylinder will be eccentrically worn, and the service life of the seal will be low

Without balance counterweight, the energy-saving effect is not ideal, and the workover needs to be coordinated with a crane, which is inconvenient for the workover operation

Images