摘要
从气井中开采出来的天然气不可避免地会携带固体杂质。这些固体杂质会对集气管线产生冲蚀损伤,弯管处尤甚。在现有弯管冲蚀规律基础上,为了更直观地找出冲蚀形貌,有针对性地提高弯管抗冲蚀性能,对常规输气弯管进行冲蚀规律的数值模拟研究,采用离散相(DPM)模拟离散颗粒的运动并选用Tulsa大学(E/CRC)提出的冲蚀磨损预测模型,通过试验对比验证了模型的可靠性。根据冲蚀磨损主要发生在弯管45°~55°处的特征,设计了3种优化弯管结构(渐扩弯管、突扩弯管、加导流片弯管)来减缓弯管处的冲蚀磨损。结果表明:与等直径弯管相比,在相同运行工况下,渐扩弯管和加导流片弯管的最大冲蚀率分别减少了64%和34%,而使用突扩弯管反而会加剧弯管处的冲蚀。该结论可为弯管的抗冲蚀结构优化提供理论依据。
It is inevitable for the natural gas extracted from gas wells to carry solid impurities,which will cause erosion damage to the gas gathering pipeline,especially at the elbow.On the basis of the existing erosion laws of elbows,in order to find out the erosion morphology more intuitively and improve the erosion resistance of elbows in a targeted manner,a numerical simulation study on the erosion laws of conventional gas transmission elbows was conducted.Discrete Phase Model(DPM)was used to simulate the movement of discrete particles,and the erosion and wear prediction model proposed by Tulsa University(E/CRC)was selected.Additionally,the reliability of the model was verified by comparison with experiments.According to the feature that erosion wear mainly occurs at 45°~55°of the elbow,three kinds of optimized elbow structures including gradually expanding elbow,suddenly expanding elbow and elbow with deflector were designed to slow down the erosion and wear of the elbow.Results showed that compared with the equal diameter elbow,the maximum erosion rate of the gradually expanding elbow and the elbow with deflector under the same operating conditions was reduced by 64%and 34%respectively,while the sudden expanding elbow would aggravate the erosion at the elbow.In general,the conclusion could provide a theoretical basis for the optimization of the anti-erosion structure of the elbow.
作者
伍丽娟
向斐
史宝成
张引弟
张兴凯
翟晓鹏
楼一珊
WU Li-juan;XIANG Fei;SHI Bao-cheng;ZHANG Yin-di;ZHANG Xing-kai;ZHAI Xiao-peng;LOU Yi-shan(School of Petroleum Engineering,Yangtze University,Wuhan 430100,China;The Third Oil Production Plant of PetroChina Changqing Oilfield Company,Yinchuan 750000,China)
出处
《材料保护》
CAS
CSCD
2021年第10期50-57,共8页
Materials Protection
基金
国家科技重大专项“砂泥岩互层开发井防砂优化技术”(2016ZX05025-002-03)
中海油项目“深水测试出砂预测、监测及防砂技术研究”(CCL2018RCPS0050RSN)资助。
关键词
输气弯管
冲蚀磨损
DPM模型
数值模拟
结构优化
gas transmission elbow
erosion wear
DPM
numerical simulation
structure optimization
