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Sealing Failure Analysis on V-Shaped Sealing Rings of an Inserted Sealing Tool Used for Multistage Fracturing Processes

Author

Listed:
  • Gang Hu

    (School of Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500, China
    Industrial Systems Engineering, University of Regina, Regina, SK S4S 0A2, Canada)

  • Guorong Wang

    (School of Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500, China)

  • Liming Dai

    (Industrial Systems Engineering, University of Regina, Regina, SK S4S 0A2, Canada)

  • Peng Zhang

    (School of Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500, China)

  • Ming Li

    (Sanden Chongqing Automative Air Conditionting CO. Ltd., Chongqing 401120, China)

  • Yukun Fu

    (Engeering Technology Reasearch Insititute, PetroChina Southwest Oil & Gas Field Company, Chengdu 610017, China)

Abstract

The inserted sealing tool is a critical downhole implement that is used to balance the downhole pressure in multistage fracturing operations and prevent fracturing fluid from overflow and/or backward flow. The sealing ring of an inserted sealing tool plays an important role in downhole sealing since a sealing failure would ail the fracturing operation. In order to improve the sealing performance and reduce the potential fracturing failures, this research aims to investigate the influence of V-shaped sealing ring geometries on sealing performance. Constitutive experiments of rubber materials were carried out and the parameters of the constitutive relationship of rubber materials were obtained. A two-dimensional axisymmetric model considering the sealing ring has been established and influences are investigated with considerations of various system parameters and operating conditions. It is found that the stresses concentrated at the shoulder and inner vertex of the sealing ring have direct impact on the damage of the sealing rings under operational conditions. Moreover, the sealing interference, among several other factors, greatly affects the life of the sealing ring. A new design of the sealing ring is suggested with optimized geometric parameters. Its geometric parameters are the edge height of 5 mm, the vertex angle of 90°–100°, and the interference of 0.1 mm, which show a better performance and prolonged operation life of the sealing ring.

Suggested Citation

  • Gang Hu & Guorong Wang & Liming Dai & Peng Zhang & Ming Li & Yukun Fu, 2018. "Sealing Failure Analysis on V-Shaped Sealing Rings of an Inserted Sealing Tool Used for Multistage Fracturing Processes," Energies, MDPI, vol. 11(6), pages 1-11, June.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:6:p:1432-:d:150424
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    References listed on IDEAS

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    1. Youwei He & Shiqing Cheng & Zhenhua Rui & Jiazheng Qin & Liang Fu & Jianguo Shi & Yang Wang & Dingyi Li & Shirish Patil & Haiyang Yu & Jun Lu, 2018. "An Improved Rate-Transient Analysis Model of Multi-Fractured Horizontal Wells with Non-Uniform Hydraulic Fracture Properties," Energies, MDPI, vol. 11(2), pages 1-17, February.
    2. Hongfang Lu & Xiaonan Wu & Kun Huang, 2018. "Study on the Effect of Reciprocating Pump Pipeline System Vibration on Oil Transportation Stations," Energies, MDPI, vol. 11(1), pages 1-23, January.
    3. Deliang Zhang & Yu Dai & Xinhua Ma & Liehui Zhang & Bing Zhong & Jianfa Wu & Zhengwu Tao, 2018. "An Analysis for the Influences of Fracture Network System on Multi-Stage Fractured Horizontal Well Productivity in Shale Gas Reservoirs," Energies, MDPI, vol. 11(2), pages 1-19, February.
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