Design optimization of OCTG premium connection system based on the effect of stabbing flank angle

Kim, Byeongil; Huang, Jin; Yoon, Jong-Ho

doi:10.1007/s12206-021-0114-2

Cited by 3 publications

(1 citation statement)

References 6 publications

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“…Chen et al investigated the sealing mechanism of tubing and casing premium threaded connections under complex loads [14]. Kim et al analyzed the effects of stabbing flank angle, upper stabbing flank corner radius on the von Mises stress of premium connection and presented the design criteria [15]. Zhang et al adopted the viscoelastic finite element model to predict the relaxation of contact pressure on the premium connections' sealing surface versus time under different temperatures [16].…”

Section: Et Al Presented Adoptingmentioning

confidence: 99%

Effects of Make-Up Torque on the Sealability of Sphere-Type Premium Connection for Tubing and Casing Strings

Yang

Xiang

et al. 2023

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The present investigations on sealability evaluation for tubing and casing premium connections depend on the FEM with testing. This paper proposed a theoretical model to evaluate the sealability of a sphere-type premium connection based on make-up torque, which combines Hertz contact pressure and the von Mises yield criterion for calculating elastic–plastic contact pressure distribution on sealing interface and adopts the gas sealing criterion obtained from Murtagian’s experimental results for deducing gas sealing capacity. With the proposed model, the effects of additional make-up torque from the sealing interface on the sealing contact pressure distribution and key sealability parameters, including contact width, yield width, average contact pressure and gas sealing capacity, were analyzed and compared. The results show that additional make-up torque from the sealing interface closely influenced sealability parameters’ variation and gas sealing capacity. The gas sealing index based on the sealing contact energy theory should be recommended for sealability evaluation other than average contact pressure on the sealing interface. For improving gas sealability, make-up torque should be controlled accurately for ensuring enough average contact pressure and contact width but a proper yield width, and a lager sphere radius should be selected for reducing the risk of yield sticking.

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Section: Et Al Presented Adoptingmentioning

confidence: 99%

Effects of Make-Up Torque on the Sealability of Sphere-Type Premium Connection for Tubing and Casing Strings

Yang

Xiang

et al. 2023

Processes

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Predicting connection integrity with consideration of thermo stress

Cheng

Liu

et al. 2022

J Mech Sci Technol

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Leakage Model of Tubing and Casing Premium Connection Based on Sinusoidal Contact Simulation between Rough Surfaces

Zhang

Xiang

et al. 2023

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This paper proposed a semi-theoretical model to quantitatively predict leakage rate of tubing and casing premium connections. The geometric parameters of the sealing surface profile approximated by a sinusoidal micro-convex surface were first obtained based on the random normal distribution sampling method. With the actual area prediction formula for elastic–plastic contact of an axisymmetric sinusoidal micro-convex body based on the equivalent simulation principle, the circumferential leakage width and radial average leakage height of the micro-leakage channel between sealing surfaces were then acquired with the surface roughness and geometric mean contact pressure. At last, the actual micro-leakage rate of the premium connection was derived by considering the non-uniform contact pressure distribution between sealing surfaces. An example was investigated to validate the model and reveal the sealing and leakage characteristics, and anti-leakage measures were proposed. The results show that average contact pressure, circumferential leakage width, and radial average leakage height between sealing surfaces were non-uniformly distributed. The leakage rate of a premium connection decreases exponentially with an increase in radial interference between sealing surfaces. In order to reduce leakage rate, it is beneficial to increase radial interference and lower sealing surface roughness.

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Design optimization of OCTG premium connection system based on the effect of stabbing flank angle

Cited by 3 publications

References 6 publications

Effects of Make-Up Torque on the Sealability of Sphere-Type Premium Connection for Tubing and Casing Strings

Effects of Make-Up Torque on the Sealability of Sphere-Type Premium Connection for Tubing and Casing Strings

Predicting connection integrity with consideration of thermo stress

Leakage Model of Tubing and Casing Premium Connection Based on Sinusoidal Contact Simulation between Rough Surfaces

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