Anti-freezing-blockage natural gas collecting and conveying system and anti-freezing-blockage method for natural gas collecting and conveying system

Abstract

The invention provides an anti-freezing-blockage natural gas collecting and conveying system and an anti-freezing-blockage method for the natural gas collecting and conveying system. The natural gas collecting and conveying system comprises a gas collecting main line and a metering main line, one end of the gas collecting main line and one end of the metering main line communicate through a connecting pipeline, the ends, facing the connecting pipeline, of the gas collecting main line and the metering main line are provided with a first gas collecting branch line and a first metering branch line respectively, the first gas collecting branch line and the first metering branch line are used for communicating the gas collecting main line and the metering main line with a first single well respectively, the first single well does not pass a well fluid into the gas collecting main line and the metering main line, a second gas collecting branch line and a second metering branch line are usedfor communicating the gas collecting main line and the metering main line with a second single well respectively, a first control mechanism is arranged at the communicating position between the secondmetering branch line and the metering main line, and the flow direction of a well fluid from the second single well in the metering main line is controlled through the first control mechanism. According to the natural gas collecting and conveying system, through reverse flow of the well fluids in the pipelines, the purposes of freezing-blockage prevention and pipeline protecting are achieved.

Description

technical field [0001] The invention relates to oil and gas production technology, in particular to a natural gas gathering and transportation system for preventing freezing and blocking and a method for preventing freezing and blocking of the natural gas gathering and transportation system. Background technique [0002] The gathering and transportation system refers to the system that collects and transports well fluids (crude oil or natural gas) extracted from oil and gas fields. During production in winter, due to the low ambient temperature, the oil and gas field gathering and transportation system, especially the natural gas gathering and transportation system, is prone to freeze blockage, especially when there is a blind end on the gas gathering trunk line or the metering trunk line, because the natural gas cannot pass through smoothly, and the environment If the temperature is low, the entire collection and transportation line will be blocked due to the generation of ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned defects in the prior art, the present invention provides a natural gas gathering and transportation system that prevents freezing and blocking. The natural gas gathering and transportation system can solve the problem of freezing and blocking that occurs in the natural gas gathering and transportation system under low temperature conditions, and ensure the safe and stable operation of the gas field

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