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

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 m...

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Autores principales:	Hai YANG, Liangliang DONG, XiangJun YU, Yuan TANG, Fang QIN, Fangfang ZHANG, Jian TAN
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2021
Materias:	annular blowout preventer spherical rubber core large deformation of rubber numerical simulation sealing performance Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/8171d9a631554d0685c8097b0c6f237c
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id	oai:doaj.org-article:8171d9a631554d0685c8097b0c6f237c
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spelling	oai:doaj.org-article:8171d9a631554d0685c8097b0c6f237c2021-11-29T06:05:55ZStudy on sensitivity of annular BOP parameters to sealing performance in gas well snubbing service2187-974510.1299/mej.20-00533https://doaj.org/article/8171d9a631554d0685c8097b0c6f237c2021-03-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/8/2/8_20-00533/_pdf/-char/enhttps://doaj.org/toc/2187-9745Annular 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.Hai YANGLiangliang DONGXiangJun YUYuan TANGFang QINFangfang ZHANGJian TANThe Japan Society of Mechanical Engineersarticleannular blowout preventerspherical rubber corelarge deformation of rubbernumerical simulationsealing performanceMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 8, Iss 2, Pp 20-00533-20-00533 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	annular blowout preventer spherical rubber core large deformation of rubber numerical simulation sealing performance Mechanical engineering and machinery TJ1-1570
spellingShingle	annular blowout preventer spherical rubber core large deformation of rubber numerical simulation sealing performance Mechanical engineering and machinery TJ1-1570 Hai YANG Liangliang DONG XiangJun YU Yuan TANG Fang QIN Fangfang ZHANG Jian TAN Study on sensitivity of annular BOP parameters to sealing performance in gas well snubbing service
description	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.
format	article
author	Hai YANG Liangliang DONG XiangJun YU Yuan TANG Fang QIN Fangfang ZHANG Jian TAN
author_facet	Hai YANG Liangliang DONG XiangJun YU Yuan TANG Fang QIN Fangfang ZHANG Jian TAN
author_sort	Hai YANG
title	Study on sensitivity of annular BOP parameters to sealing performance in gas well snubbing service
title_short	Study on sensitivity of annular BOP parameters to sealing performance in gas well snubbing service
title_full	Study on sensitivity of annular BOP parameters to sealing performance in gas well snubbing service
title_fullStr	Study on sensitivity of annular BOP parameters to sealing performance in gas well snubbing service
title_full_unstemmed	Study on sensitivity of annular BOP parameters to sealing performance in gas well snubbing service
title_sort	study on sensitivity of annular bop parameters to sealing performance in gas well snubbing service
publisher	The Japan Society of Mechanical Engineers
publishDate	2021
url	https://doaj.org/article/8171d9a631554d0685c8097b0c6f237c
work_keys_str_mv	AT haiyang studyonsensitivityofannularbopparameterstosealingperformanceingaswellsnubbingservice AT liangliangdong studyonsensitivityofannularbopparameterstosealingperformanceingaswellsnubbingservice AT xiangjunyu studyonsensitivityofannularbopparameterstosealingperformanceingaswellsnubbingservice AT yuantang studyonsensitivityofannularbopparameterstosealingperformanceingaswellsnubbingservice AT fangqin studyonsensitivityofannularbopparameterstosealingperformanceingaswellsnubbingservice AT fangfangzhang studyonsensitivityofannularbopparameterstosealingperformanceingaswellsnubbingservice AT jiantan studyonsensitivityofannularbopparameterstosealingperformanceingaswellsnubbingservice
_version_	1718407596327567360

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

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