Theoretical and Experimental Bases for the Creation of Advanced Process Equipment to Improve the Efficiency of Recovering High-Viscosity Oil from Deep Oil-Bearing Beds

摘要

The creation of new technological equipment for the implementation of highly efficient methods for recovering viscous oil from deep oil-bearing beds is a challenging scientific and engineering objective. To this end, a series of theoretical and experimental studies for designing tubing with the application of the developed basalt- and glass-fiber-based composite heat-insulating coatings has been carried out. In order to achieve the scientific objectives the method of finite element analysis in the license NASTRAN software environment has been used. The said method ensures the performance of integrated scientific and engineering calculations, including the calculation of stress-strain state of mechanical systems, the solution of heat transfer problems, the research into non-linear static and dynamic transient processes, the frequency-response analysis, etc. As a result of the performed work, due to the first time applied methods of computer modeling in NASTRAN software environment, the strength calculation for compression, tension, torsion and sheer of a steel pipe, a spider grapple assembly, a hydraulic tong grapple assembly, a foot section assembly for glass-fiber sheath, a coupling section, a thrust ring, protective and power glass-fiber (basalt-and-plastic) sheath of tubing has been performed and presented in a complete form. The values of tubing design total strain, the values of local strains in the areas of tubing power elements contact, the values of normal forces in the area of tubing power elements have been obtained. A mathematical model of thermal conductivity, which describes the steady-state conditions of temperature change in fibrous highly-porous material with regard for Stefan-Boltzmann heat losses, has been developed. The work results ensure the implementation of the tubing physical design phase with the prospects of its further use in the course of introducing thermal oil recovery methods intended to increase oil recovery from producing formation.