Hydraulic oil pumping system

Abstract

The invention discloses a hydraulic oil pumping system, relating to oil extraction equipment for extracting oil from deep hard rock stratum. The invention aims at providing a balance hydraulic cylinder arranged in oil wells for converting gravity forces of an oil pumping rod and an oil pump in two oil wells and a liquid column into hydraulic pressure and serving as balance weight for balance. Simultaneously, the hydraulic power of the hydraulic pump station drives the power hydraulic cylinder in the oil well to drive the oil pump for extracting oil. Therefore, the purposes of being simple in structure, saving energy and improving work efficiency are achieved. The invention comprises at least one hydraulic oil pumping unit which comprises a power part and an oil extracting part under the power part, wherein the power part is connected with the hydraulic pump station on the ground; the structural feature is that the hydraulic oil pumping unit further comprises a balance part, wherein the balance part is connected with the power part and the oil extracting part, and a hollow oil pumping rod penetrates through the power part, the balance part and the oil extracting part.

Description

technical field [0001] The invention relates to an oil recovery equipment for oil extraction in deep rock formations. In particular, it relates to a combination of two oil wells that converts the gravity of the sucker rods, pumps and liquid columns in the wells into hydraulic pressure through a balance hydraulic cylinder placed under the oil wells, and forms a closed hydraulic circuit for mutual counterweight balance. The hydraulic cylinder drives the balanced hydraulic pumping unit of the pump. Background technique [0002] Mechanical oil recovery is one of the main traditional oil recovery methods at home and abroad. Pumping units are used in oil fields with a large quantity and a wide range. In order to meet the requirements of various well conditions, there are various types of pumping units with different structures. Pumping unit, pendulum pumping unit, etc. [0003] The above-mentioned pumping units play their respective roles in production. But according to the st...

AI Technical Summary

Problems solved by technology

However, according to the actual production requirements according to the structural form and technical performance of the existing pumping unit, there are still many deficiencies that are difficult to overcome

For example, these pumping units placed at the wellhead have a large mechanical structure, a large footprint, low pumping load, and limited production volume, which cannot meet the production requirements

In order to reduce the working load of the pumping unit, a counterweight device with a complex structure is designed, and it is very troublesome to adjust the stroke and stroke times.

And the whole mechanical equipment is completely exposed on the ground surface, so it is affected by seasons and natural environment; the above shortcomings make the further popularization and application of existing oil pumping equipment subject to certain restrictions

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