Casing-associated natural gas pressure regulation and oil increase device for cluster production wells

Abstract

The invention relates to a cluster type producing well oil-increasing device for realizing pressure regulation of associated natural gas in casings. The device adopts a set of three-beam multi-column hydraulic bidirectional intake and exhaust device and comprises at least one hydraulic oil cylinder, at least one bidirectional vacuum compression pump body, a hydraulic station, gas inlet pipelines and gas exhaust pipelines, wherein the gas inlet pipelines and the gas exhaust pipelines are communicated to producing wells one by one, the gas inlet pipelines are connected together one by one, and the gas exhaust pipelines are connected together one by one; all hydraulic oil cylinders are connected to the hydraulic station through hydraulic oil inlet pipes and hydraulic oil return pipes. The device has the characteristics that the bidirectional vacuum compression valve is adopted, the internal oil duct layout of a piston is reasonable, and regular expanding devices are designed for a piston sealing ring. The device adopts a cluster mounting mode, saves time and labor, greatly improves the work efficiency and can be arranged on the ground, so that the risk of a worker working aloft is reduced; further, the gas exhaust capacity is improved, the casing pressure is reduced rapidly to a great extent, flow resistance of upward movement of an oil-gas-water mixed liquid is reduced, a working fluid level is restored, the pump admission coefficient is increased, and accordingly, the hydraulic oil yield is increased.

Description

technical field [0001] The invention provides an oil production well oil increasing device matched with a pumping unit Christmas tree in an oil field, and in particular relates to a cluster type oil production well casing associated natural gas pressure regulating and oil increasing device. Background technique [0002] Most oil production wells in China have passed the stage of spontaneous oil recovery, and are currently undergoing secondary and tertiary oil recovery stages such as water flooding, gas flooding, chemical flooding, and microbial flooding. Under such mining conditions, most of them are low-permeability and ultra-low-permeability oil and gas reservoirs, and the difficulty of exploitation is becoming more and more serious. With the continuous global demand for oil resources, various oil companies have been advocating stable and increased production. For this goal, oil fields have increased the transformation measures for increasing oil and gas, which has continu...

AI Technical Summary

Problems solved by technology

With the continuous global demand for oil resources, various oil companies have been advocating stable and increased production. For this goal, oil fields have increased the transformation measures for increasing oil and gas, which has continuously increased production costs. In various oil increasing technologies There is a common disadvantage. When oil is produced in the oil field, associated natural gas is produced simultaneously. The associated natural gas is separated from the oil at the wellhead and enters the casing of the oil well. The associated natural gas accumulates in the downhole and the casing pressure is increasing. Air resistance or air lock will be generated in the downhole, which can stop the flow of the dynamic liquid surface, reduce the efficiency of the oil pump, and the motor of the oil well will run on its own, increasing energy consumption, reducing the amount of oil recovered, and many methods cannot effectively recover or Releasing ultra-high pressure associated natural gas in pumping well casing

[0003] At present, there are several ways to release the associated natural gas in the pumping well: 1. The pressure in the casing is emptied, so that the natural gas cannot be recycled, and at the same time pollute the environment, which can cause oilfield fires

2. Ground bushing negative pressure method: adopt the cylinder pumping method, install the cylinder in the high altitude of the swinging beam, so that the installation, maintenance, and heat preservation are all in the air. There are safety hazards, and the exhaust volume is not enough to reach the pumping The degree of rapid pressure relief of the casing pressure of the oil machine

3. The oil sleeve is connected, and the one-way valve cannot be activated when the oil outlet pressure is too high, which may cause problems such as pump holding and air blockage

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