About turning of the column (pipes or rods) with its descent into the three-dimensional-bent bore hole

摘要

The analysis of causes for the appearance of the turning of the upper part of the column (pipes or rods) with its descent into the three-dimensional- bent bore hole is given. Analysis showed that at the moment of the passage of column in the upper three-dimensional- bent interval it composes three-interval section with its local values of the angle of torsion and torque. The redistribution of torque to the side of the accomplishment of the smallest expenditures for twisting strain causes the turning of column in the upper longest section. With further launching of column each of its sections acquires the form of lower adjacent interval and acquires the appropriate parameters of deformation. 3thrd the section of column no longer can with the 2nd lie on one plane, it is attached and to the 4th section of column, what is the reason for the absence of the turning of the upper part of the column. All rotations, acquisitions of new status of the column of pipes and rods are the consequence of the local nature of the torsion angle and torque.