元坝气田笼套式节流阀故障及处理措施  

Faults and treatment measures of corbula-type throttle valves in Yuanba Gas Field

作　　者：袁淋 梁中红 姜林希 权子涵 曾志金 YUAN Lin;LIANG Zhonghong;JIANG Linxi;QUAN Zihan;ZENG Zhijin(Second Gas Production Plant,SINOPEC Southwest Oil and Gas Compan)

机构地区：[1]中国石油化工股份有限公司西南油气分公司采气二厂

出　　处：《油气储运》2018年第8期941-946,951,共7页Oil & Gas Storage and Transportation

基　　金：中国石化科技部项目"元坝超深高含硫气藏开发关键技术研究";P13056

摘　　要：笼套式节流阀是控制气井产量及集输管网压力的重要部件,为了分析其常见故障原因及研究相应的处理措施,以元坝高含硫气田各采集气井站笼套式节流阀为研究对象,统计了笼套式节流阀外漏、内漏、阀套脆裂、轴承损毁、异物堵塞及阀芯脱落等常见故障。结合阀门设计原理、密封原理及外部原因分析,得到故障原因主要有:密封组件失效、阀芯设计不合理、气体及异物冲蚀、硫沉积与水合物堵塞等。针对故障原因提出了更换密封组件、更换阀门及热水浇淋等处理措施,同时制定了保障备品备件充足、气井工作制度合理及优化阀芯设计、硬质合金涂层材料等一系列对策,为降低笼套式节流阀故障率提供一定的理论与实践依据。Corbula-type throttle valve is an important valve in controlling the production rate of gas well and the pressure of pipeline network. In order to analyze the causes of the common corbula-type throttle valve faults and study the corresponding treatment measures, In this paper, a case study was carried out on Yuanba High-Sulfur Gas Field. The corbula-type throttle valves in its gas gathering well stations were taken as the study objects and their common faults were summarized, e.g. external leakage, internal leakage, valve pocket embrittlement, bearing damage, foreign matter blockage and valve core＇s spinning off. Then, combined with the valve design principle, the sealing principle and the external cause analysis, the causes of these common faults were analyzed. It is indicated that they are mainly caused by failed seal assembly, unreasonable valve core design, gas and foreign matter washout, sulfur deposition and hydrate blockage. Finally, some treatment measures were put forward, e.g., replacing the seal assembly and the valve and spraying hot water. Furthermore, a series of countermeasures were prepared, such as providing sufficient spare parts, setting up reasonable gas well working system, and optimizing the design of valve core and the coating material on cemented carbide. The research results provide the theoretical and practical basis for reducing the fault rate of corbula-type throttle valve.

关 键 词：元坝气田 笼套式节流阀 故障分析 处理措施 对策 

分 类 号：TE927[石油与天然气工程—石油机械设备]