Simulation analysis of thread grease sealing based on nonlinear seepage flow

LI Xiuyu; MA Lifeng; MENG Xiaoming

doi:10.12299/jsues.24-0220

Volume 40 Issue 1

Mar. 2026

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LI Xiuyu, MA Lifeng, MENG Xiaoming. Simulation analysis of thread grease sealing based on nonlinear seepage flow[J]. Journal of Shanghai University of Engineering Science, 2026, 40(1): 74-80. doi: 10.12299/jsues.24-0220

Citation:

LI Xiuyu, MA Lifeng, MENG Xiaoming. Simulation analysis of thread grease sealing based on nonlinear seepage flow[J]. Journal of Shanghai University of Engineering Science, 2026, 40(1): 74-80. doi: 10.12299/jsues.24-0220

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Simulation analysis of thread grease sealing based on nonlinear seepage flow

doi: 10.12299/jsues.24-0220

LI Xiuyu^1
,,
MA Lifeng^{1
,
,},
MENG Xiaoming²

1.
School of Mechanical and Automotive Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
2.
Aorui Auto Parts (Shanghai) Co., Ltd., Engineering Development Department, Shanghai 201600, China

Received Date: 2024-08-08
Available Online: 2026-05-27
Publish Date: 2026-03-01

Abstract

Abstract

Leakage at the thread engagement of API oil casing affects the safety and efficiency of oil and gas extraction. A simulation method based on the thread grease sealing mechanism and nonlinear seepage theory was proposed, and the feasibility of the simulation prediction of thread grease sealing performance was verified. The sealing mechanism of the thread grease was revealed by the plugging mechanism of thread grease particles, the non-Newtonian characteristics of the base grease, and the nonlinear seepage theory. According to this sealing mechanism, the simulation of base grease seepage in the particle plugging section was realized. The results show that both temperature increase and particle size decrease lead to the reduction of the sealing performance of thread grease, and the predicted leakage resistance of thread grease is similar in magnitude to that under actual working conditions, which provides some guidance for the improvement of thread grease sealing performance and simulation prediction research.
- thread grease,
- simulation analysis,
- sealing performance,
- nonlinear seepage flow

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References(18)

References

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