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煤层气有杆泵排采井口在较低的环境温度下作业时,煤层气在管道中发生节流效应导致井口冰冻,严重影响气井正常生产,为此设计一种结构简单、成本低廉的燃气炉和管道组成的保温装置。该装置的设计依据节流效应原理,利用气体BWRS状态方程,给出焦耳-汤姆逊系数的计算方法,得到煤层气排采井口的制冷量。利用少量井口排采出的煤层气,在满足制冷量要求的情况下,得到燃气炉主要结构的设计参数。通过产生的烟气,把管道的热量传递给井口装置,防止装置发生结冰现象。井口保温装置的设计与研制对保证煤层气井的正常稳定排采具有重要的应用价值和现实意义。
When the coalbed methane pumped-pump wellhead operates at lower ambient temperature, the coalbed methane will have a throttling effect in the pipeline leading to the freezing of the wellhead and seriously affecting the normal production of the gas well. Therefore, a simple and low-cost gas furnace is designed And pipe insulation device. The design of this device is based on the throttling effect principle. The gas BWRS equation of state is used to calculate the Joule-Thomson coefficient, and the cooling capacity of the coalbed methane drainage wellhead is obtained. The CBM produced by a small number of wellheads is used to obtain the design parameters of the main structure of the gasifier while meeting the cooling capacity requirements. The generated flue gas transfers the heat from the pipe to the wellhead to prevent icing of the unit. The design and development of wellhead thermal insulation device have important application value and practical significance to ensure the normal and stable discharge of coalbed methane wells.