Problems of determination of operating loads on a production drill-pipe casing string
The paper determines the directions of the researches aimed at preventing the phenomenon of losses of a well flow area and its aftereffects under the influence of loads on the production string, being the result of stress-strain state of the surrounding rocks. The initial stresses in the linear-elastic rocks are determined as well. It is proved that in case of <i>u</i><sub>z</sub> ≠ 0, the coefficient of rocks lateral thrust is defined similarly when <i>u</i><sub>z</sub> = 0.