STUDY OF THE OPERATION OF THE WELL PACKER COMPACTION AT DIFFERENT VALUES OF THE COEFFICIENTS OF FRICTION BETWEEN ITS ELEMENTS

Abstract

A comprehensive analysis of the factors affecting the strength and durability of the rubber sealing cuffs of well packers was carried out. Approaches to comprehensive assessment of options for calculation and design of well packer seals by using a number of criteria are described. The stress-strain state of the sealing cuffs of well test packers was studied numerically with the help of special software. An analysis of previous studies of the stress-strain state of packer seals has been carried out. Features of model selection and description of the behavior of the packer sealing material are shown. A calculation scheme of the packer sealing operation was built, taking into account both the operating loads and limitations, as well as various coefficients of friction between the elements of the sealing sleeves and the casing. The principle of operation of simulated packer sealing is described. It is emphasized that the sealing capacity of the packer depends on the magnitude and distribution of the contact pressure on the surfaces of the sealing sleeves and casing, as well as on the geometric shape of the constituent elements. The working principle of the packer seal, the values and distribution of the contact pressure on the sealing sleeves will be the same if the rubber-steel friction coefficient approaches zero, which cannot be achieved under the operating conditions of the packer. Therefore, simulation simulations of the work of the packer sealing were carried out and the values and distribution of contact pressures on the sealing cuffs for different values of friction coefficients were determined. The dependences of the distribution of displacements, equivalent stresses, and contact pressure for different friction coefficients were obtained. Special attention was paid to the maximum deformation of the packer cuffs and the place of concentration of equivalent stresses.