西南石油大学学报(自然科学版)

• 博导论评 • 上一篇    

大斜度井中套管磨损机理研究

练章华1 *,于浩1,刘永辉2,林铁军1,张强1   

  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. 中国石油冀东油田公司钻采工艺研究院,河北唐山063004
  • 出版日期:2016-04-11 发布日期:2016-04-11
  • 通讯作者: 练章华,E-mail:cwctlzh@swpu.edu.cn
  • 基金资助:

    国家“十二五”科技重大专项(2011ZX05050);教育部博士点基金(20135121110005)。

A Study on the Casing Wear Mechanism in Highly-deviated Well Drilling

LIAN Zhanghua1*, YU Hao1, LIU Yonghui2, LIN Tiejun1, ZHANG Qiang1   

  1. 1. State Key Laboratory of Oil and Gas Geology and Exploration,Southwest Petroleum University,Chengdu,Sichuan 610500,China
    2. Drilling and Production Technology Institute of Jidong Oilfield Company,PetroChina,Tangshan,Hebei 063004,China
  • Online:2016-04-11 Published:2016-04-11

摘要:

针对套管在大斜度井中的磨损失效,首先开展了套管的磨损实验研究,根据Dawson 和White 提出的基于能
量损失的线性磨损模型以及本文的实验数据,获得了钻杆接头与套管的磨损系数。建立了钻杆接头与套管磨损机理
研究的有限元模型,通过任意拉格朗日欧拉自适应网格划分,在数值模拟过程中可以对套管磨损的节点进行“实时
调整”,并对网格单元做光滑处理,不断更新钻柱接头与套管的接触关系,对钻进过程中套管磨损机理进行了研究。在
磨损后套管结构形状研究的基础上,开展了套管剩余抗挤强度的数值模拟研究,得到了套管的最大磨损深度随时间的
变化关系,建立了套管剩余抗挤强度与最大磨损深度的关系,进而可以预测套管在某一累积磨损时间内套管的最大磨
损深度和套管的剩余强度,为磨损套管的安全性评价提供了理论依据。

关键词: 实验研究, 套管磨损, 有限元, 剩余强度, 抗外挤强度

Abstract:

Aimed at studying the wear failure in the drilling process of highly-deviated well,this paper firstly carried out casing
wear experiment research. According to the liner casing wear model based on the energy loss suggested by Dawson R and
White J,and the experiment,the joint-casing wear coefficient is obtained. The finite element model of casing wear mechanism
research is constructed using ABAQUS software. This paper uses the re-development user subroutine and Arbitrary Lagrange-
Euler mesh. In the process of numerical simulation,the location of the wear node can be adjusted timely,the mesh element
is smoothed,and the contact relations between joint and casing is altered continuously,which all contribute to the study on
casing wear mechanism. Based on the shape of worn casing,the numerical simulation research is carried out to determine the
remaining collapse strength,as a result of which,the relationship between the maximum wear depth and wear time is obtained.
On this basis,the exact relationship between the maximum wear depth and wear time is determined to predict the maximum
wear depth and remaining strength of casing after a period of accumulating wear time,which also provides theoretical basis for
the safety assessment of worn casing.

Key words: experiment study, casing wear, finite element, remaining strength, collapse strength

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