Analysis of Sealing and Leakage Performance of the Subsea Collet Connector with Lens-Type Sealing Structure

Yun, Feihong; Wang, Gang; Yan, Zheping; Jia, Peng; Xu, Xiujun; Wang, Liquan; Sun, Haiting; Liu, Weifeng

doi:10.3390/jmse8060444

Cited by 17 publications

(18 citation statements)

References 25 publications

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“…In engineering, the contact compaction effect and the sealing pressure are connected through an experiment. The experiment found that there is a linear relationship between the sealing pressure and the contact stress, and defines the ratio of the average contact stress applied to the unit effective area to the internal pressure, which is called the gasket coefficient, which is expressed by m. When the material of the metal sealing gasket is Incoloy 825, the gasket coefficient m = 6.5 [23], namely: p = mp in (18) In Figure 5e, the theoretical calculation equation of contact sealing of the ideal calculation model of underwater clamp connector is obtained by combining Equations ( 10), ( 15), ( 16) and (18):…”

Section: Derivation Of Contact Sealing Theory Of Underwater Clamp Connectormentioning

confidence: 99%

“…The axial force acting on the sealing gasket only accounts for 4% to 8% of the axial force provided by the press. The error fluctuation of the test measurement data will amplify the F a error fluctuation obtained by Equation (23).…”

Section: Inner Cavity Pressure Sealing Testmentioning

confidence: 99%

“…The principle and steps of the Interlayer cavity pressure sealing test and th cavity pressure sealing test are basically similar, and the differences are explained i below, refer to Equation (23). The Fa is indirectly obtained as: The steps of the interlayer cavity pressure sealing test are the same as those in 3.2, however, the specific applied pressure values are different.…”

Section: Interlayer Cavity Pressure Sealing Testmentioning

confidence: 99%

“…The principle and steps of the Interlayer cavity pressure sealing test and the inner cavity pressure sealing test are basically similar, and the differences are explained in detail below, refer to Equation (23). The F a is indirectly obtained as:…”

Section: Interlayer Cavity Pressure Sealing Testmentioning

confidence: 99%

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The Research and Experiments on Contact Sealing Theory of the Underwater Clamp Connector

et al. 2021

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With regard to the sealing structure characteristics of the underwater clamp connector, based on the Hertz contact theory, this article studies the method of solving the extreme value of the radius of curvature on the two curved surfaces at the sealing contact point; first, the method of calculating the extreme value of the radius of curvature at any surface point of the rotary part is obtained, and then the equivalent radius of curvature is solved. Using finite element simulation to study the contact sealing characteristics without considering the edge thickness and width of the sealing gasket, it is verified that the Hertz contact theory is applicable to the metal contact theory of underwater clamp connectors. Then, the sealing simulation with the influence of the detailed dimensions of the sealing gasket is compared with the theoretical result of the direct application of the Hertz contact theory in the underwater clamp connector contact, and the theoretical correction coefficient of metal contact seal for underwater clamp connectors is introduced to solve the errors. The pressure sealing experiment is carried out on six-inch flange and metal sealing gasket, which proves that the coefficient can greatly enhance the theoretical calculation accuracy of the contact sealing of the underwater clamp connector.

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Section: Derivation Of Contact Sealing Theory Of Underwater Clamp Connectormentioning

confidence: 99%

Section: Inner Cavity Pressure Sealing Testmentioning

confidence: 99%

Section: Interlayer Cavity Pressure Sealing Testmentioning

confidence: 99%

Section: Interlayer Cavity Pressure Sealing Testmentioning

confidence: 99%

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The Research and Experiments on Contact Sealing Theory of the Underwater Clamp Connector

et al. 2021

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“…5 This leads to high maintenance costs as well as oil and gas leakage if a DPC fails. 6 Therefore, reliability analysis has been the focus of structure design and maintenance for DPCs.…”

Section: Introductionmentioning

confidence: 99%

Sealing reliability assessment of deep-water oil and nature gas pipeline connector considering thermo-mechanical coupling

Zeng

Sun

Zhao

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part M:

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The deep-water pipeline connector (DPC) is a key piece of equipment for the connection of multiple facilities located in different positions of the subsea production system. Its sealing reliability affects the safety of the production system directly during oil and gas exploration. Although the reliability assessment methods of the DPC have been investigated, previous studies have mostly been carried out under a single mechanical field. To determine the DPC reliability considering thermo-mechanical coupling, this paper establishes random load models of working pressure and temperature by using the Gaussian function, and the stochastic finite element model of the DPC is constructed to obtain the sealing performance under coupling conditions. A Kriging–Sobol sensitivity analysis method is developed to obtain the main variables influencing the sealing performance for the purpose of decreasing the computational cost of the ordinary sensitivity analysis. A reliability assessment approach based on the cross entropy-importance sampling-Kriging method is introduced to analyze the DPC reliability, and a sealing reliability assessment method of DPC under thermo-mechanical coupling conditions is finally formed. An engineering case is taken to verify the effectiveness of the proposed method. The results show that the reliability analysis accuracy of the proposed method is almost agreed with the Monte Carlo method, but the computational cost can be reduced 85.61%, which indicates that the proposed method provides designers with a fast method with an acceptable computational cost to assess the reliability of the DPC connector under coupling conditions.

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A fast GA-ANN model and application in multi-objective optimization of the sealing ring for the subsea pipeline connector with regard of the penetration load

Jiao,

Yun,

Hao

et al. 2024

J Mech Sci Technol

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Analysis of Sealing and Leakage Performance of the Subsea Collet Connector with Lens-Type Sealing Structure

Cited by 17 publications

References 25 publications

The Research and Experiments on Contact Sealing Theory of the Underwater Clamp Connector

The Research and Experiments on Contact Sealing Theory of the Underwater Clamp Connector

Sealing reliability assessment of deep-water oil and nature gas pipeline connector considering thermo-mechanical coupling

A fast GA-ANN model and application in multi-objective optimization of the sealing ring for the subsea pipeline connector with regard of the penetration load

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