Device for collecting oil well natural gas

Abstract

The invention relates to a device for collecting oil well natural gas. The device is mounted at the lower part of an oil pump and consists of a gas-liquid collector, a packer, an oil jacket communicating valve and a gas-liquid separator. The device is characterized in that the gas-liquid collector is located at the lowest part of the whole device and is used for collecting oil liquid and natural gas in well liquid, the packer is arranged at the upper part of the gas-liquid collector and is used for separating an oil jacket annular space into an upper part and a lower part, the oil jacket communicating valve is connected to the upper part of the packer, the oil liquid collected by the gas-liquid collector can enter the oil jacket annular space at the upper part of the packer through the oil jacket communicating valve, so as to form a working fluid level, the gas-liquid separator is connected to the upper part of the oil jacket communicating valve and is used for separating an entering mixture of the natural gas and the oil liquid, and the upper part of the gas-liquid separator is directly connected with the oil pump or indirectly connected with the oil pump through an oil tube. The device is simple in construction, can realize the effective collection of the oil well natural gas at downhole, meanwhile, does not affect the daily production and management of an oil well, such as well-flushing operation and working fluid level measurement, and cannot be artificially damaged, so that the waste of resources can be reduced, and the environmental pollution can be reduced.

Description

technical field [0001] The invention relates to a device for collecting natural gas decomposed from crude oil during crude oil exploitation, in particular to a device for collecting natural gas in an oil well underground. Background technique [0002] Crude oil contains a considerable amount of dissolved natural gas. During the extraction process, these dissolved gases will gradually volatilize in the form of gas to form free natural gas. Only a small part of the natural gas will be pumped out together with the well fluid, while most of the rest will accumulate in the annular space between the tubing and the casing (hereinafter referred to as the casing annulus). A large amount of natural gas stored in the oil casing annulus, with the continuous accumulation of the quantity, will increase the pressure on the fluid level of the oil well and have a greater impact on crude oil production. The traditional treatment method is to open the casing gate to discharge the natural gas ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a device for collecting natural gas under the pump, which is easy to operate and easy Affect the normal well cleaning operation and the measurement of dynamic liquid level

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