Simulation and experimental analysis of critical stress regions of deep-water annular blowout preventer

Li, Wang; Tang, Yula; Yu-ting, HE

doi:10.1016/j.engfailanal.2019.104161

Engineering Failure Analysis

2019

DOI: 10.1016/j.engfailanal.2019.104161

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Simulation and experimental analysis of critical stress regions of deep-water annular blowout preventer

Wang Li

Yula Tang

HE Yu-ting³

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Cited by 10 publications

(1 citation statement)

References 7 publications

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“…In recent years, many scholars have carried out a lot of research on the sealing process of the annular BOP in combination with the finite element method. Li et al (Li et al, 2019) used a two-dimensional axisymmetric model in the finite element software to analyze the main pressure-bearing parts of the annular BOP, the top cover and the shell, found that there are two stress concentrations inside the shell, where are prone to failure, but the force of the rubber core was not analyzed. Zou et al (Zou et al, 2016) assumed that both the BOP shell and the rubber core satisfy Hooke's law and did not consider the rubber core as a hyperelastic body.…”

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Study on sensitivity of annular BOP parameters to sealing performance in gas well snubbing service

Yang¹,

Dong

Xiang-jun³

et al. 2021

Mechanical Engineering Journal

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Annular Blowout Preventer (BOP) is the core device for snubbing service in gas wells. The wellhead can be sealed by operating the BOP. Rubber core of annular BOP is the main part of the sealing process, and its failure will cause blowout accidents and endanger the operators. Rubber core failure is mainly caused by the serious wear and fracturing damage, compared with oil well, during the snubbing service of the gas well, there is dry friction between rubber core and tubing, which is more prone to rubber core wear. Based on the Yeoh constitutive model, this paper fits the material parameters through the data measured by the rubber tensile experiment, and establishes the sealing performance evaluation model of the annular BOP based on the theory of rubber hyperelastic, large deformation theory and dynamic sealing theory. Meanwhile, compare it with the rubber core failure cases which used in field to verify the accuracy of the model. Based on these, this paper studies the influence of piston stroke, tubing size, friction coefficient between rubber core and tubing, rubber core attrition rate on sealing performance, and fitting the relationship between tubing size and piston stroke. The results show that: properly increasing the piston stroke by 2 to 3 mm will help to improve the sealing performance; when the tubing size is smaller, the rubber core is deformed too much while the seal process completed, which is easy to cause the rubber core to fracturing; friction coefficient between rubber core and tubing has no significant effect on static sealing performance; the friction coefficient less than 0.2 has little effect on the dynamic sealing performance; when the friction coefficient exceeds 0.4, the dynamic sealing performance is reduced significantly; when the wear of rubber core is within 10 mm, the sealing performance gradually decreases, but the sealing requirements can still be met. When it is more than 10 mm, it cannot meet the sealing requirements of 35 MPa. The research work in this paper has certain guiding significance for the design, selection and use of the rubber core of annular BOP.

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confidence: 99%

Study on sensitivity of annular BOP parameters to sealing performance in gas well snubbing service

Yang¹,

Dong

Xiang-jun³

et al. 2021

Mechanical Engineering Journal

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Failure Analysis of Ram Body and Sealing Performance of Semi-Sealed Blowout Preventer

Liu

Qian

Xia

et al. 2022

J Fail. Anal. and Preven.

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Finite Element Analysis of Cracking of Double Ram Blowout Preventer

Wang

Zhou²,

Cheng³

et al. 2022

J Fail. Anal. and Preven.

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Simulation and experimental analysis of critical stress regions of deep-water annular blowout preventer

Cited by 10 publications

References 7 publications

Study on sensitivity of annular BOP parameters to sealing performance in gas well snubbing service

Study on sensitivity of annular BOP parameters to sealing performance in gas well snubbing service

Failure Analysis of Ram Body and Sealing Performance of Semi-Sealed Blowout Preventer

Finite Element Analysis of Cracking of Double Ram Blowout Preventer

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