高温粗煤气环境下节流工具冲蚀磨损研究  

Erosion and Wear of Throttling Tools in High Temperature and Coarse Gas Environment

作　　者：王建军 周兵超 赵楠 李宏杰 韩旭[5] 杨思齐 任相羿 WANG Jianjun;ZHOU Bingchao;ZHAO Nan;LI Hongjie;HAN Xu;YANG Siqi;REN Xiangyi(State Key Laboratory of Oil and Gas Equipment,CNPC Tubular Goods Research Institute,Xi′an,Shaanxi 710077,China;Mechanical Engineering College,Xi′an Shiyou University,Xi′an,Shaanxi 710065,China;Gas Storage Co.Ltd.,PetroChina Xinjiang Oilfield Company,Changji,Xinjiang 831200,China;Tianjin Gas Storage Branch,PetroChina Dagang Oilfield Company,Tianjin 300280,China;The Second Gas Plant,PetroChina Changqing Oilfield Company,Yulin,Shaanxi 719000,China)

机构地区：[1]中国石油集团工程材料研究院有限公司,油气钻采输送装备全国重点实验室,陕西西安710077 [2]西安石油大学机械工程学院,陕西西安710065 [3]中国石油新疆油田储气库有限公司,新疆昌吉831200 [4]中国石油大港油田天津储气库分公司,天津300280 [5]中国石油长庆油田分公司第二采气厂,陕西榆林719000

出　　处：《石油管材与仪器》2024年第4期48-54,共7页Petroleum Tubular Goods & Instruments

基　　金：中国石油基础性前瞻性科技专项“石油工程基础材料、基础元器件研究”(编号:2023ZZ11);中国石油基础研究和战略储备技术研究基金项目“煤炭地下气化超高温井下降温工具材料和结构设计研究”(编号:2021DQ03(2022Z-03))。

摘　　要：在气井井下节流工艺中,节流器位于井筒适当位置,能实现气体的降温降压,简化采气流程,降低生产成本,提高经济效益。井下节流工具结构类似截面突缩装置,能使气体流速增加、压力降低。但在煤炭地下气化过程中,由于燃烧不充分,粗煤气中含有大量微小煤粉颗粒,会对节流工具造成严重冲蚀磨损,导致节流工具失效,产生井控安全风险。为此,设计出双节流孔结构的井下节流工具,仿真预测节流工具所面临的冲蚀磨损情况,分析内部流场特性,研究气体速度、颗粒直径、颗粒质量流量对节流工具内壁的冲蚀磨损影响,为后续实际使用提供指导。In the downhole throttling process of gas wells,the throttling tool is located at an appropriate position in the wellbore,which can reduce the temperature and pressure of the gas,simplify the gas production process,reduce production costs,and improve economic benefits.The structure of the downhole throttling tool is similar to the cross-section shrinkage device,which can increase the gas flow rate and reduce the pressure.However,during the underground coal gasification process,due to insufficient combustion,the crude gas contains a large number of tiny pulverized coal particles,which will cause severe erosion and wear of the throttling tools,resulting in the failure of the throttling tools and creating well control safety risks.To this end,this article designs an underground choke tool with a double throttling structure,simulates and predicts the erosion and wear conditions faced by the throttling tool,analyzes the internal flow field characteristics and explores the effects of gas velocity,particle diameter,and particle mass flow on the tool.The investigated impact mechanism of erosion and wear on the wall surface of the pipe string will guide its subsequent actual use.

关 键 词：煤炭地下气化 冲蚀 节流工具 数值模拟 高温 

分 类 号：TE988.2[石油与天然气工程—石油机械设备]