Ryzhenko E.V.

Head of the Intellectual Property Department, Volzhsky scientific and technical complex (branch) Volgograd State Technical University, Russia

DEFORMATION OF THE PACKING ELEMENT WHEN THE DIFFERENT PRESSURE IN THE BOREHOLE

https://doi.org/10.34031/2618-7183-2019-2-4-27-38
Abstract
A method for calculating the stress-deformed condition of the packing element shells reinforced with a sys-tem of metal tapes is proposed. The whole process of deformation of the shell under the influence of internal overpressure is conventionally divided into four stages. For each stage, the scheme of deformation of the shell is considered and the solution of the problem is given on the basis of the nonlinear theory of elasticity and the theory of soft shells. All stages of shell deformation considered in this paper are illustrated by the calculation scheme. An example of shell calculation with specified characteristics and deformation conditions is given.
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CALCULATION OF THE SLEEVE PACKER ELEMENT WITH THE VARIABLE ANGLE OF LAYING OF THREADS OF THE CORD FOR CREATION OF EDGE PROTECTION (PART 1)

https://doi.org/10.34031/2618-7183-2019-2-2-29-40
Abstract
The method of calculation of influence of design and technological parameters of material of a cover of a packer element is developed: the initial angle of laying of threads of the reinforcing framework, the packing density of threads in the field of unions, number of layers of a framework, rubber elastic modulus on power characteristics of a cover, for the purpose of creation of edge protection of a packer element. In the first part of work the cover of a packer element with laying of threads with a constant corner on all length of a cover is investigated. The received results of calculation, allowed to evaluate and prove quantitatively the constructive and technological directions of reliability augmentation of edge protection of a packer element. The developed calculation procedure is a basis of development of more general method of calculation of power characteristics of a cover of a packer element with variable longwise covers the initial angle of laying of threads.
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CALCULATION OF THE SLEEVE PACKER ELEMENT WITH THE VARIABLE ANGLE OF LAYING OF THREADS OF THE CORD FOR CREATION OF EDGE PROTECTION (PART 2)

https://doi.org/10.34031/2618-7183-2019-2-2-41-49
Abstract
In the presented part of work the case with the angle of laying variable longwise of the reinforcing threads of a packer element in median and edge zones is investigated. Calculation of power characteristics of a cover of a packer element with various slopes is carried out. Tests of natural prototypes of covers the packer ele-ments are carried out. The calculation results compared with data of an experiment are presented in the form of schedules with good degree of convergence. The developed technique allows to choose an optimum design of covers of a packer element with higher value of rigidity on face sites that ensures reliable functioning of a packer element at pressure differences in annular space.
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