Ground throttling device

Abstract

The invention provides a ground throttling device, which comprises a throttling device body, wherein the throttling device body carries out throttling and pressure reduction on natural gas which flowsthrough the throttling device body, and the temperature of the natural gas is guaranteed to be still a natural gas hydrate critical temperature or above all the time; the throttling device body comprises a plurality of throttling pore plates; the throttling pore plates are arranged at intervals according to preset distances; and each throttling pore plate is provided with throttling pores. According to the ground throttling device, after the high-pressure natural gas of a natural gas well mouth passes through the ground throttling device, a purpose that the high-pressure natural gas reaches alow-pressure external transmission pipeline is realized under a situation that no natural gas hydrates are generated while throttling. The ground throttling device is simple to operate, has a low cost and simplifies a gathering and transportation technological process of a natural gas well field.

Description

technical field [0001] The application relates to the technical field of natural gas throttling gathering and transportation, in particular to a ground throttling device. Background technique [0002] Natural gas hydrate is a crystalline compound formed by water and hydrocarbon gases in natural gas under certain pressure and temperature (higher than the freezing point of water). There is a maximum temperature for the formation of natural gas hydrate, that is, the critical temperature. If this temperature is exceeded, hydrates will not be formed no matter how high the pressure is. The formation of hydrates will block the wellbore or gas production pipeline, affecting the normal production of gas wells. [0003] In the process of gas field production, according to the characteristics of the surface development model, the depressurization production method is often adopted. Hydrates may be formed during wellbore and surface throttling during depressurization production, causi...

AI Technical Summary

Problems solved by technology

[0006] The existing problems are: the choke is located below the formation, the operation and salvage costs are high, and the underground data collection is inconvenient, making it difficult to truly understand the underground gas production parameters

[0008] The problem is: the cost of methanol antifreeze itself is relatively high, and the addition of alcohol injection equipment and operation pipelines

[0010] The problem is: the operating cost of the heating furnace is high, and the heating furnace needs to be maintained all the time

[0011] Therefore, there is a need for a throttling process to solve the problem of difficult operation and high cost of the downhole throttle. It can also replace the ground throttling heating furnace and throttle valve, and can also replace the alcohol injection device to simplify the natural gas production well site gathering and transportation process.

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