FEATURES OF DESIGNING OF MARINE INDUSTRIAL PIPELINES IN MODERN CONDITIONS

Abstract

One of the main reasons for the underwater field pipelines decommissioning, depending on the production region in 70 - 75 % of cases, is corrosive wear, which means that there is a need to lay a new line. In this case, it is economically advantageous to impose higher requirements on the materials used in construction, the quality of work performed, which will affect the increase in the service life of pipelines. In the remaining 30 - 35 % of cases, decommissioning occurs due to oil field development or wells accident, a change in product flow direction, obsolescence, and economic policy change, the influence of various environmental conditions on offshore field pipelines, and no confirmation of performance new wells forecast or even improper group of wells operation. With an increase in the service life of pipelines, it is also possible to reuse used pipelines and pipes in new fields. In general, the basis for increasing the offshore field pipelines service life are: economic feasibility; efficient use of large length of offshore field pipelines; reduction of accidents. In the design and construction of offshore field pipelines in modern conditions it is required to consider the efficiency principles, durability and reliability of the system. In addition to these requirements, account must be taken of the reusing used pipes possibility.