Optimal use of supports in interposing a pipeline into the submerged crossing well. Part 2

Abstract

The paper considers the problem of supports optimal arrangement in pulling a pipeline through the well during construction of the submerged crossing by the directional drilling method. Part 1 of this work presented results of using the pipeline rod model with positioning the transition section on the fixed supports with the variable lift height. Part 2 simulates the use of a group of the movable supports. Initially, the group working stroke is carried out accompanied by the supports positioning towards the well with a decrease in the pipeline height. After a stop in the final position, the group is being restructured taking the initial position for the next motion cycle. When the supports are moved, optimality conditions are met in the form of the missing contact load behind the well inlet and minimum stresses in the transition section, or the minimum supports reaction. The supports are brought to their initial state by taking the first support behind the last support, or by moving each of the supports in turn to the required position. The presented solution allows pulling through at the technologically determined minimum impact of the mounting loads on the pipeline.