High-low pressure switching and venting skid-mounted device based on large cluster well set

Abstract

The present invention provides a high-low pressure switching and venting skid-mounted device based on a large cluster well set. The high-low pressure switching and venting skid-mounted device comprises an outer transporting pipeline; the outer transporting pipeline is disposed on a skid seat; one end of the outer transporting pipeline is parallelly provided with a first interface and a second interface; the other end of the outer transporting pipeline is provided with a natural gas outlet; the outer transporting pipeline is connected with a low pressure venting pipeline, a pressurizing pipeline and a return transporting pipeline after pressurization which are parallelly connected; and the low pressure venting pipeline, the pressurizing pipeline and the return transporting pipeline after pressurization are all disposed on the skid seat. According to the high-low pressure switching and venting skid-mounted device based on the large cluster well set, different requirements of pressurizing and venting of high pressure and low pressure gas wells can be simultaneously satisfied, safety production of the large cluster well set can be guaranteed when emergency cut-off of a downstream gas gathering station or a treatment plant is caused by accidents, land occupation is reduced, construction progress is accelerated, and cost is saved.

Description

technical field [0001] The invention belongs to the technical field of gas field gathering and transportation, and in particular relates to a high-low pressure switching and venting skid-mounted device based on a large cluster well group. Background technique [0002] With the development of the country's economy, the country's demand for energy is increasing. As a clean energy source, natural gas is developing rapidly. As the ground construction part of natural gas development, the construction scale is large and the number of construction stations is large. Large cluster wells have been widely popularized in gas field construction due to their advantages such as small area, few management points, and low construction costs. Large cluster wells mean that 16 to 20 gas wells are built in one well site, the pre-pressure of the well group is 6MPa to 10MPa higher, and the production is high (34×10 4 m 3 ~112×10 4 m 3 ). Since the production cycle of each gas well is differ...

AI Technical Summary

Problems solved by technology

[0004] 2. The pressure difference between high and low pressure gas wells is large, and the high and low pressure venting systems cannot be used as backup venting systems;

[0005] 3. Due to the emergency shutdown of the downstream gas gathering station or processing plant due to accidents, the pressure of the external pipeline 29 of the large cluster well group fluctuates greatly, and natural gas flows back, which affects the safe production of the large cluster well group;

[0006] 4. Since the large cluster well group is far away from the treatment plant, it is uneconomical to use conventional trucks to transport the produced water or laying water pipelines alone.

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