Authors: Yu.,M. Lekontsev, A.A. Khoreshok, P.V. Sazhin, Yu.B. Mezentsev

Title of the article: Investigation and calculation of polyurethane packer elements for axial compression

Year: 2021, Issue: 4, Pages: 3-8

Branch of knowledge: 05.05.06 Mining machines

Index UDK: 622.23.05

DOI: 10.26730/1816-4528-2021-4-3-8

Abstract: The design of a device developed and patented at the N. A. Chinakal Institute of Mining of the Siberian Branch of the Russian Academy of Sciences, which allows hydraulic fracturing along the entire length of the well at intervals pro-vided for by technological calculations, is presented. The process of operation of the sealing elements of the balanced sealer under conditions of axial compression is described on the example of a device developed at the N. A. Chinakal Institute of Mining of the Siberian Branch of the Russian Academy of Sciences. A laboratory stand for the study of samples of bushings made of polyurethane is schematically presented. According to the results of laboratory studies, comparative types of deformations of thin-wall metal cylinders and polyurethane bushings under the action of static axial loading are shown. Theoretical calculations of changes in the geometric dimensions of the samples in the form of hollow cylinders made of elastomers in the perpendicular direction to the applied force are presented. The criteria for calculating the geometric parameters of sealing bushings for packer devices and the optimal force action, which eliminates the loss of their stability during axial compression, and, consequently, the exclusion of their “jamming” in the working well, are determined. A theoretical calculation of the maximum axial loading force is performed on the example of a polyurethane sample in the form of a hollow cylindrical sleeve with geometric dimensions: d = 72 mm, L=200 mm and δ = 18 mm, and a comparison is made with bench tests of the samples.

Key words: balanced sealer sealing element packer interval hydraulic fracturing

Receiving date: 26.01.2021

Publication date: 25.08.2021

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