Study on Sinusoidal Post-Buckling Deformation of Coiled Tubing in Horizontal Wells Based on the Separation Constant Method [PDF]
Machines, 2023 In this paper, a set of partial differential equations considering the dynamic effects of the coiled tubing (CT) is established based on the bending theory of slender beams considering the axial loads.
Łi Zhuang +3 more
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Study on helical post-buckling of motional coiled tubing in horizontal wells
Journal of Petroleum Exploration and Production TechnologyCoiled tubing is widely used in oil and gas operations. However, the long coiled tubing may undergo sinusoidal or helical buckling deformations, and even lock-up, leading to property damage and serious accidents.
Zhuang Li +3 more
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Current Status of Research on Composite Coiled Tubing and its Mechanical Properties
Shiyou jixie, 2021 Composite coiled tubing is a fiber reinforced composite pipe. Compared with steel coiled tubing, it has the advantages of corrosion resistance and fatigue resistance, especially, it has a good effect in replacing steel coiled tubing in corrosive wellbore
Wang Li, Ma Weiguo, Zhang Fang
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Experimental study on corrosion resistance of coiled tubing welds in high temperature and pressure environment. [PDF]
PLoS One, 2021 Coiled tubing (CT) has been widely used for oil and gas exploitation, however corrosion of CT under high pressure and high temperature (HPHT) environment was often reported, also corrosion induced failures of CT welds were often observed to occur during ...
Liu S +4 more
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Analysis of the running capacity of coiled tubing in three-dimensional curved borehole
IOP Conference Series: Earth and Environment, 2021 When coiled tubing enters three-dimensional borehole, elastic deformation is very easy to occur, leading to the decrease of running depth. In order to study the running capacity of coiled tubing, the running friction of coiled tubing under sinusoidal ...
Yinping Cao +5 more
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Calculation of Annular Flow Resistance of Coiled Tubing in Slimhole Based on Hyperbolic Model
Shiyou jixie, 2019 Most of the researches on the annulus flow resistance in China are focused on the conventional drilling annulus flow resistance, few study is involved in the calculation of the annular flow resistance of coiled tubing drilling in ø89.0 mm slimhole.
Hou Xuejun +6 more
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Study on Mechanical Properties of Coiled Tubing under Clamping State
Shiyou jixie, 2016 Analyzing mechanical properties of coiled tubing under clamping state are important for design and optimization of clamping block and determination of optimal clamping pressure.
Hu Zhiqiang +5 more
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AMESim-based Study on Dynamic Behavior of Gripping Force of Coiled Tubing Injector Head
Shiyou jixie, 2018 Many problems occur in the coiled tubing operation in oil and gas wells, including coiled tubing slipping, slippage and tubing bite, which seriously threaten the safety of the operation and the life of the coiled tubing.
Ma Weiguo +5 more
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Microstructure and Performance Analysis of 2205 Duplex Phase Stainless Steel Coiled Tubing
Shiyou jixie, 2022 Carbon steel coiled tubing has serious corrosion and low fatigue life in the oil field with the coexistence of H2S and CO2. Therefore, 2205 duplex phase stainless steel coiled tubing with strong corrosion resistance and reasonable matching of strength ...
Wang Haitao +6 more
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Coiling instabilities of multilamellar tubes [PDF]
Physical Review E, 2002 Myelin figures are densely packed stacks of coaxial cylindrical bilayers that are unstable to the formation of coils or double helices. These myelin figures appear to have no intrinsic chirality. We show that such cylindrical membrane stacks can develop an instability when they acquire a spontaneous curvature or when the equilibrium distance between ...
Santangelo, Christian, Pincus, P.
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