西南石油大学学报(自然科学版)

• 石油机械工程及其他 • 上一篇    下一篇

排砂管线弯接头的冲蚀机理研究

练章华1,陈新海1,林铁军1,明鑫1,郑建翔1,2   

  1. 1.“油气藏地质及开发工程”国家重点实验室· 西南石油大学,四川成都610500
    2. 中国石化华东石油工程有限公司固井分公司,江苏扬州225101
  • 出版日期:2014-02-01 发布日期:2014-02-01
  • 基金资助:

    国家自然科学基金“基于数值模拟的复杂地层地应力反演研究”(50774063);教育部博士点基金(20135121110005)。

Study on Erosion Mechanism of Bending Joint in Blooey Line

Lian Zhanghua1, Chen Xinhai1, Lin Tiejun1, Ming Xin1, Zheng Jianxiang1,2   

  1. 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitaion,Southwest Petroleum University,Chengdu,Sichuan 610500,China
    2. Cementing Engineering Company,Huadong Petroleum Administration,SINOPEC,Yangzhou,Jiangsu 225101,China
  • Online:2014-02-01 Published:2014-02-01

摘要:

排砂管线是气体钻井中不可缺少的地面设备之一,在高压高产气井的钻井中存在安全隐患,常规情况下通常
被人们忽略。排砂管线失效主要由高速气流中的固体颗粒冲蚀破坏,通常发生在弯接头部分。针对排砂管线弯接头
的冲蚀失效情况,开展冲蚀破坏机理的理论研究和数学模型研究,对弯接头的冲蚀攻角、冲蚀函数、冲蚀颗粒形状系数
以及固体颗粒的受力状况进行探讨。建立排砂管线弯接头的CFD 有限元模型,可以任意改变弯接头的角度,定量地
模拟不同工况下含有固相颗粒的多相流对弯接头的冲蚀速率和冲蚀机理,对排砂管线在气体极限流量100×104 m3/d
和50×104 m3/d 的工况下,对不同含砂量进行一系列的CFD 仿真模拟,得出冲蚀速率随弯接头角度变化定量的关系曲
线,为弯接头的结构优化设计提供理论依据。

关键词: 排砂管线, 弯接头, 冲蚀机理, CFD 模型, 固体颗粒

Abstract:

Blooey line is the one of indispensable ground equipment in gas drilling,which has potential safety hazard in high
pressure and high yield gas well drilling,but it is usually ignored in common. Because of solid particle erosion in high speed
air flow,failure destruction of blooey line occurs mainly in bending joint. Based on erosion destruction of bending joint,we
launch the study of erosion destruction mechanism and mathematical model,and carry on the theory discussion on erosion
angle of attack,erosion function,erosion coefficient of particle shape and the stress of the solid particle. At the same time,
this paper established the CFD finite element model and the angle of bending joint can change arbitrarily,which quantitatively
simulates erosion rate of multiphase flow containing solid particles to blooey line bending joint under different conditions and
do erosion mechanism research,and there is a series of CFD simulation study under the limitation flow rate(100×104 m3/d
and 50×104 m3/d)in different sand content. Finally,obtained quantitative relation curves between erosion rate and the angle
of joint,it provides the theoretical basis for the blooey line bending joint structure optimization in this paper.

Key words: blooey line, bending joint, erosion mechanism, CFD model, solid particle