Mechanical plugging—solid expandable tubular refracturing technology

Zhu, Xiaohua; Cheng, Feilong; Shi, Changshuai; Chen, Kailin

doi:10.1007/s12206-020-0512-x

Cited by 11 publications

(1 citation statement)

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“…It is a technology that uses the cold plastic forming characteristics of metals and relies on external force to expand the inner diameter to the required value. After decades of development, it has achieved tremendous development in plugging, repairing casing, and optimizing the wellbore structure [4]. In recent years, a large number of scholars and engineers have conducted research on many aspects of the technologyThey mainly focused on the selection of materials, the optimization of the expansion cone, the collapse after expansion, the expansion force, etc., and achieved remarkable achievements [5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Study on the Technology of Solid Expandable Tubular in Open-Hole Well

Zhu¹,

Cheng²,

Shi³

et al. 2020

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During the production and drilling of open hole wells, due to the uncertainty and complexity of the rock,The naked hole section is prone to accidents such as collapse of the shaft wall and leakage. In order to solve the above problems, this paper proposes the plugging technology of solid expandable tubualr(SET) in open-hole wells. Based on experimental data,this paper established a dynamic three-dimensional model which considers friction and contact. The author puts forward the applicability criterion of open hole and studies the sensitivity parameters of expansion cone. The research results show that when SET specifications are determined, the borehole size of the open hole well has a great influence on the contact pressure, residual stress, driving force and other factors after the SET is formed, and to a certain extent affects the subsequent service. In addition, the structural parameters of the expansion cone also have a great influence on the plastic forming of SET. The results of this paper provide guidelines and theoretical basis for the use of SET technology in open hole wells.

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