煤层气排采井口温降计算与保温装置设计  

Calculation on temperature drop at CBM drainage wellhead and insulation device design

作　　者：牛文杰[1] 吴建军[1] 刘新福[1] 綦耀光[1] 张中慧[2] 

机构地区：[1]中国石油大学(华东)机电工程学院,山东东营257061 [2]胜利石油管理局采油工艺研究院,山东东营257000

出　　处：《机械设计》2011年第9期71-75,共5页Journal of Machine Design

基　　金：国家科技重大专项资助项目(2009ZX05038-004);山东省科技发展计划资助项目(2009GG10007008)

摘　　要：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 sucker rod pump for CBM operates at the CBM drainage wellhead in the ambient environment with lower temperature,the wellhead＇s freezing is caused due to the throttle effect of the CBM in pipeline,this adversely affects the normal production of the gas well.For this reason,a kind of attemperator made up by gas furnace and pipeline which is simple in structure and cheap in cost has been designed.The design of this device is in accordance with throttling effect theory.By using BWRS state equation,the cooling capacity at the CBM drainage wellhead was determined by applying the calculation method when the Joule-Thomson coefficient is given.With the use of a little CBM output from the wellhead drainage,under the condition that the cooling capacity requirement is met,main structural design parameters of the gas furnace was obtained.The heat in the pipeline is transfer to the device at wellhead by the generated smoke,preventing the freezing happening.the design and development of the wellhead attemperator has important application value and practical significance for the normal and stable drainage of the CBM well.

关 键 词：煤层气井口 节流效应 保温 燃气炉 结构设计 

分 类 号：TD842[矿业工程—煤矿开采]