Mechanical automatic control hydraulic driving pumping unit

Abstract

The invention discloses a hydraulically driven pumping unit with mechanical automatic control. A hydraulic cylinder and a movable pulley installed at the end of the piston rod of the hydraulic cylinder are fixed horizontally on the frame, and steel wire ropes are sequentially installed on the frame at the rear of the hydraulic cylinder for adjustment. One end of the wire rope is connected with the wire rope adjuster, the other end is connected with the sucker rod through the movable pulley and the fixed pulley, and the stroke control rod installed on the side of the hydraulic cylinder A symmetrical block is set, and the control rod of the motorized reversing valve is matched with the symmetrical stopper. A speed regulating valve and a check valve are arranged on the oil path between the oil pump and the motorized reversing valve. A hydraulic control reversing valve and a one-way throttle valve are arranged on the oil passage between the rodless chambers. The invention is small in size and low in energy consumption, and can adjust the stroke conveniently. It uses mechanical automatic control of the motorized reversing valve to realize the up and down variable speed movement of the sucker rod according to the needs, improves the mechanical performance, and can conveniently solve the workover space.

Description

technical field [0001] The invention belongs to the improvement of oil extraction equipment, in particular to a hydraulically driven pumping unit which is converted into mechanical automatic control by transferring energy through liquid. 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. At present, oil fields generally use long-stroke oil well pumps in order to increase oil production. Due to structural problems, mechanical transmission oil pump units cannot meet the requirements of long-stroke oil well pumps. Large horse-drawn carts are used to increase the stroke, which greatly increases power consumption. If the stroke exceeds 2.5 meters, it is difficult to realize the mechanical transmission pumping unit at present. Chinese patent specification CN251...

AI Technical Summary

Problems solved by technology

Its disadvantages are: through the analysis of the hydraulic principle diagram, this invention adopts the electromagnetic reversing valve, and the electric signal of the electromagnetic valve is provided by the travel switch. There is a one-way throttle valve on the oil circuit, artificially creating the back pressure of the rod chamber to cause power loss, and the installation of an oil drain valve on the oil circuit without the rod chamber will cause the sucker rod to speed up and undershoot, and accidents will occur

During well workover, the workover space is small and the workover is inconvenient

Images