Gas well opening and ice blockage slowing device

Abstract

The invention discloses a gas well opening and ice blockage slowing device. The device comprises a vortex purging part located on the upper stream and a hydrate filtering part located on the lower stream; the vortex purging part comprises an upper oil pipe, a purging part upper end flange and a purging part lower end flange are fixed to the two ends of the upper oil pipe correspondingly, and a center rod is arranged in the upper oil pipe; rotational flow blades are fixed to the center rod, and starting ends and tail ends of the rotational flow blades are fixed to the inner wall of the upper oil pipe; the hydrate filtering part comprises a lower oil pipe, a filter upper end flange and a filter lower end flange are fixed to the two ends of the lower oil pipe correspondingly, and a filteringpipe bundle is fixed in the lower oil pipe through a pipe bundle base; and the vortex purging part and the hydrate filtering part are connected through the purging part lower end flange and the filterupper end flange. According to the gas well opening and ice blockage slowing device, hydrate particles larger than the inner diameter of a wellhead flow meter flow channel and generated in the needlevalve throttling well opening process can be filtered, the well opening freezing and blocking phenomenon of a gas well is relieved, the well opening success rate of the gas well is increased, and themanagement and maintenance difficulty of the gas well is reduced.

Description

technical field [0001] The invention relates to the technical field of natural gas exploitation, in particular to a gas well opening slowing ice plugging device. Background technique [0002] When the pressure recovery of some gas wells is relatively high, whether it is the manual needle valve for opening and closing the wellhead or the electric needle valve for automatic opening and closing of the well, it is unavoidable due to the throttling phenomenon in the process of opening the well. There is a cooling phenomenon, and when the temperature and pressure meet the conditions for hydrate formation, hydrates will be generated in the wellhead pipeline. [0003] As the well opening process proceeds, the gas flow will blow some hydrate particles to the flow meter downstream of the wellhead pipeline. Due to the narrow flow path of the flowmeter, some ice particles will block the flow path of the flowmeter, causing blockage at the flowmeter and blockage of the wellhead pipeline....

AI Technical Summary

Problems solved by technology

At present, in the process of opening the well, if there is a freeze-blocking situation, it can only be solved by injecting alcohol at the wellhead after the freeze-blocking or waiting for a period of time, and repeating the well-opening attempt many times to solve it, which increases the difficulty of gas well management and maintenance and consumes manpower and material resources

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