Study of the effect of the expansion cone on the expansion process in solid expandable tubulars with thread joints

Xu, Shugen; Wang, Shengkun; Meng, Weige; Wang, Chong; Sun, Zhe

doi:10.1016/j.petrol.2017.08.048

Cited by 16 publications

(6 citation statements)

References 18 publications

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“…The expansion rate is linked to the size of expansion cone. Xu, et al [14] proposed that the cone angle and sizing section length should be 9° and 65-75 mm, respectively, in which the ex-creased continually, the TSS may exceed the tensile strength, thus leading to plastic failure. Therefore, the expansion rate is suggested to not exceed 35%.…”

Section: Discussionmentioning

confidence: 99%

“…Li, et al [12] and Wilson [6] developed innovative designs of solid expandable tubulars to successfully perform casing patch in difficult conditions, and the designs proved to be cost effective. Xu, et al [13,14] investigated the deformation, residual stress, mechanical properties, and microstructure variation of the expansion process for J55 steel expandable tube with thread joints by experiment and simulation. And the effect of expansion cone geometry was investigated.…”

Section: Introductionmentioning

confidence: 99%

“…And the effect of expansion cone geometry was investigated. A cone angle of 9° and sizing section length of 65-75 mm were proposed [14]. In their study, the research models are based on the Tresca or Mises yield criterion, and the effects of the intermediate principal stress were ignored in the yield model.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of Expansion Rate on Stress Evolution of TWIP Expandable Tubular Based on TSS Criterion

Luo¹,

Wenchun²,

Zhou³

et al. 2020

Int J Metall Met Phys

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Expansion rate is key parameter to the manufacture of expandable tubular. In this paper, the effects of expansion rate on stress evolution of twinning induced plasticity (TWIP) steel expansion tubular were discussed in detail. A user subroutine UMAT using twin shear stress (TSS) yield criterion is employed to simulate the expanding process. The results show that the predicted residual stresses agree with the experiment very well. The axial expanding stress showed the layered distribution along the thickness direction and the hoop tensile stress is mainly located in the corner of expanded area. With the steady increases of expansion rate, the expanding axial, hoop and TSS stresses are all increased, and the increasing rate is decreased gradually. The residual stresses are tensile in inner surface and compressive in outer surface. Both the hoop and axial stresses are all increased with the increases of expansion rate. The suggested expansion rate should be controlled below 35%.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of Expansion Rate on Stress Evolution of TWIP Expandable Tubular Based on TSS Criterion

Luo¹,

Wenchun²,

Zhou³

et al. 2020

Int J Metall Met Phys

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“…An idea behind SET is the cold working (expansion) of tubular under desired conditions using a solid metallic mandrel. The mechanical work, through mandrel, can be achieved using hydraulic or mechanical pressure (Seibi et al 2005;Xu et al 2017). The primary output in expansion process is the expansion ratio that measures through the relative change in the inner diameter of tubular before and after expansion.…”

Section: Introductionmentioning

confidence: 99%

Finite element modeling and simulations of solid expandable tubular in multistage tubular-mandrel system

Alfozan

2022

Mechanical Engineering Journal

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Solid Expandable Tubular (SET) has been proven a promising technology in overcoming several unresolved challenges like isolating unwanted substances, sidetracking, and well repair and patching in horizontal wells. A novel multistage expansion system of SET is found to be an efficient way of reducing expansion cost while conserving tubular structural integrity. However, due to the complexity of multistage system, an estimation of post-expansion properties of tubular, especially in variable physical conditions, becomes a challenge in making the technology viable and cost-effective. In the current work, numerical modeling is utilized to evaluate the effects of multiple physical conditions, tubular-mandrel contact and tubular's boundary conditions, on the postexpansion properties of tubular. Initially, a finite element model of multistage tubular-mandrel system is developed using the real well conditions in finite element software ABAQUS. The real boundary conditions of tubular at the field, fixed-free and fixed-fixed, are incorporated in finite element model. Moreover, a nonlinear material model, using the experimental results of uniaxial tensile tests, is used to model tubular's material behavior, while mandrel is considered as rigid body. A surface-to-surface contact conditions are defined through Coulomb's friction law with varying coefficient of friction. The finite element simulation results are compared with the experimental observations of single-stage tubular-mandrel system and found to be in good agreement. Finally, further simulations are performed to evaluate the deformation behavior of tubular using contact pressure, equivalent stress, tubular thickness variation, length shortening, and equivalent plastic strain. It is observed that the contact and boundary conditions of tubular have significant effects on tubular post-expansion properties.

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“…Furthermore, the validity of the simulation results was experimentally confirmed. Xu et al (2017) investigated the structural response of tubulars to stress evolution, deformation of the thread joint and to the effect of expansion cone geometry. It was found that both the axial and hoop compressive stress concentrations were generated in the thread teeth edges near the contact surfaces of threads.…”

Section: Introductionmentioning

confidence: 99%

Multi-objective optimization and experiment of nylon cord rubber in expandable packer

et al. 2021

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Nylon cord rubber has the advantages of small residual deformation and is easy to lift and lower the tubing string in low-permeability oil and gas reservoirs. However, it is associated with low-pressure resistance and poor sealing performance. To enhance the performance of nylon cord rubber, a three-dimensional numerical model of the nylon cord rubber was established and its accuracy experimentally determined. The Plackett–Burman test, the Steepest climbing test and the Response surface method were used to acquire the polynomial response surface model connecting structural parameters with bearing and sealing pressure. Using genetic algorithms, optimal structural parameters of nylon cord rubber were determined depending on field operation. The reliability of the optimized results was verified by laboratory tests. It was shown that after optimization, the bearing capacity of the expandable packer increased by 25% while the sealing performance increased by 66%. In addition, the bearing pressure was 70 MPa while the sealing pressure was 50 MPa. These measurements effectively met the on-site requirements of high-pressure and fine fracturing in low-permeability oil and gas reservoirs.

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Study of the effect of the expansion cone on the expansion process in solid expandable tubulars with thread joints

Cited by 16 publications

References 18 publications

Effects of Expansion Rate on Stress Evolution of TWIP Expandable Tubular Based on TSS Criterion

Effects of Expansion Rate on Stress Evolution of TWIP Expandable Tubular Based on TSS Criterion

Finite element modeling and simulations of solid expandable tubular in multistage tubular-mandrel system

Multi-objective optimization and experiment of nylon cord rubber in expandable packer

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