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首页> 外文期刊>Applied Mathematical Modelling >Repairing force for deformed casing shaping with spinning casing swage and damage behaviour of cement sheath
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Repairing force for deformed casing shaping with spinning casing swage and damage behaviour of cement sheath

机译：用纺丝套管旋转套管旋转的修复力和水泥鞘的损伤行为

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摘要

In oil and gas fields, the repairing force (bit weight) is generally determined by experience when the deformed casing is repaired using the spinning casing swage. However, unreasonable repairing force easily damages the cement sheath around the deformed casing and causes pipe sticking, which results in failure of the wellbore integrity. Hence, based on the Hertz contact theory, the present study established a mechanical model to calculate the repairing force required to repair the deformed casing without a cement sheath by spinning casing swage, and the reshaping force was determined by combining the structural features of the spinning casing swage with the method of mechanics and kinetics analysis regarding axial loading and circumferential deformation of the deformed casing. Finally, a mechanical model was presented that could calculate the repairing force of the deformation casing with cement sheath using the inversion method. Repairing experiments involving three types of deformed casings (casing without cement sheath, casing with undamaged cement sheath and casing with damaged cement sheath) were performed, from which the accuracy and reliability of the mechanical model was validated. The damage behaviour of the cement sheath after casing repair was investigated based on the experimental results and the damage mechanism was analysed based on Saint-Venant's deformation compatibility principle. Analysis results showed that three types of damage, including micro-annulus, transverse fracture and longitudinal fracture, were caused by high contact pressure between the steel ball on the spinning casing swage and the internal wall of the deformed casing and pressure fluctuation during repairing. The research results provide important guidance and decision making for practical repairing measures. (C) 2019 Elsevier Inc. All rights reserved.
机译：在油和天然气场中，当使用纺丝套管的SWAGE修复变形壳体时，通常通过经验确定修复力（钻头重量）。然而，不合理的修复力容易损坏变形壳体周围的水泥护套并导致管道粘附，这导致井筒完整性失效。因此，基于赫兹联系理论，本研究建立了一种机械模型，以计算通过纺丝套管而没有水泥护套的无变形壳体所需的修复力，并通过组合纺纱的结构特征来确定重塑力套管纺织用机械和动力学分析方法，关于变形壳体的轴向加载和周向变形。最后，提出了一种机械模型，其可以使用反转方法计算与水泥护套的变形套管的修复力。进行修复涉及三种变形外壳的实验（没有水泥护套的套管，带有未损坏的水泥护套和带有损坏的水泥护套的套管），验证了机械模型的准确性和可靠性。基于实验结果研究了套管修复后水泥护套的损伤行为，基于圣文气变形兼容性原理分析了损伤机制。分析结果表明，在纺丝壳体旋转壳体上的钢球和变形壳体的内壁和压力波动的内壁之间的高接触压力和修复过程中的内壁之间是引起的三种类型的损坏，包括微环，横向骨折和纵向骨折。研究结果为实际修复措施提供了重要的指导和决策。 （c）2019 Elsevier Inc.保留所有权利。

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  • 来源
    《Applied Mathematical Modelling》 |2019年第6期|425-438|共14页
  • 作者

    Deng Kuanhai; Liu Wanying; Liu Bing; Lin Yuanhua; Singh Ambrish;

  • 作者单位

    Southwest Petr Univ State Key Lab Oil & Gas Reservoir Geol & Exploita Chengdu 610500 Sichuan Peoples R China|Southwest Petr Univ CNPC Key Lab Tubular Goods Engn Chengdu 610500 Sichuan Peoples R China;

    Southwest Petr Univ CNPC Key Lab Tubular Goods Engn Chengdu 610500 Sichuan Peoples R China;

    Southwest Petr Univ CNPC Key Lab Tubular Goods Engn Chengdu 610500 Sichuan Peoples R China;

    Southwest Petr Univ State Key Lab Oil & Gas Reservoir Geol & Exploita Chengdu 610500 Sichuan Peoples R China;

    Southwest Petr Univ State Key Lab Oil & Gas Reservoir Geol & Exploita Chengdu 610500 Sichuan Peoples R China|Southwest Petr Univ CNPC Key Lab Tubular Goods Engn Chengdu 610500 Sichuan Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Repairing force; Mechanical model; Repairing experiment; Deformed casing; Damage behaviour of cement sheath; Deformation compatibility principle;

    机译：修复力;机械模型;修复实验;变形壳体;水泥护套的损伤行为;变形兼容性原理;

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