Simulation of the Static Sealing Performance of Rubber Packer Cylinders in a Supercritical–CO 2 Environment

Zhenkun Zhu, Meng Cai, Lining Cui, Xingliang Song, Xiaoyu Xu, Chuanbo Cong (), Haicheng Li () and Qiming Gao
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Zhenkun Zhu: Daqing Oilfield Production Technology Institute, Daqing Oilfield Co., Ltd., Daqing 163453, China
Meng Cai: Daqing Oilfield Production Technology Institute, Daqing Oilfield Co., Ltd., Daqing 163453, China
Lining Cui: Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China
Xingliang Song: Daqing Oilfield Production Technology Institute, Daqing Oilfield Co., Ltd., Daqing 163453, China
Xiaoyu Xu: Daqing Oilfield Production Technology Institute, Daqing Oilfield Co., Ltd., Daqing 163453, China
Chuanbo Cong: College of New Energy and Materials, China University of Petroleum–Beijing, Beijing 102249, China
Haicheng Li: Daqing Oilfield Production Technology Institute, Daqing Oilfield Co., Ltd., Daqing 163453, China
Qiming Gao: Daqing Oilfield Production Technology Institute, Daqing Oilfield Co., Ltd., Daqing 163453, China

Energies, 2024, vol. 17, issue 13, 1-13

Abstract: The aim of this study was to solve the problems associated with the sealing and tearing failure of rubber packer cylinders during CO 2 downhole injection. Using Comsol Multiphysics 6.0 software, a rubber cylinder model in a supercritical CO 2 (SC–CO 2 ) environment was established. The thermal analogy method was used to simulate the CO 2 diffusion and rubber cylinder swelling process. We analyzed the deformation and stress of the rubber cylinder that was caused by temperature and pressure, with CO 2 as the swelling agent. The results show that in the SC–CO 2 environment, under the influence of CO 2 diffusion and the consequent swelling, the rubber cylinder body is prone to large deformations, and the maximum shear stress is significantly increased, leading to the shear failure of the rubber cylinder. Reducing the initial seating pressure can alleviate the impact of deformation, whereas reducing the maximum contact pressure can cause the rubber cylinder to lose its seal. We also analyzed the influence of various factors on the maximum contact stress of the rubber cylinder, providing a theoretical basis and technical support for improving the sealing performance of rubber packer cylinders in an SC–CO 2 environment.

Keywords: supercritical–CO 2; rubber packer cylinder; sealing performance; swelling (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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