One of the development priorities in oil and gas industry is to maintain gas and oil pipeline networks and develop pipeline-connected gas and oil fields of the Arctic zone of the Russian Federation, a promising region the resource potential of which will not only meet a significant portion of internal and external demand for various types of raw materials and primary energy carriers, but will also bring great economic benefits to subsoil users and the state. The mineral and raw material centers of the Nadym-Purskiy and Pur-Tazovskskiy oil and gas bearing areas are among the most attractive regions of the Arctic zone. It is necessary to develop a scientifically substantiated approach to improve the methods of oil transportation from the field to the existing pipelines. As it is known, the task of increasing the efficiency of pipeline transportation of high-viscosity oil is inseparably connected with solving problems in the field of thermal and hydraulic calculation of pipeline system. The article presents the substantiation of dependencies for hydraulic calculation of pipelines transporting high-viscosity oil exhibiting complex rheological properties. Based on the laws of hydraulics for non-Newtonian fluids, the formulas for calculating head losses for fluids obeying Ostwald's law are proposed, their relationship to the classical equations of hydraulics is shown. The theoretical substantiation of looping installation for increasing the efficiency of pipeline transportation of high-viscosity oil taking into account the received dependences for power fluid is considered.
The article deals with important current issue of oil and gas industry of using tubes made of high-strength composite corrosion resistant materials. In order to improve operational safety of industrial pipes it is feasible to use composite fiberglass tubes. More than half of the accidents at oil and gas sites happen at oil gathering systems due to high corrosiveness of pumped fluid. To reduce number of accidents and improve environmental protection we need to solve the issue of industrial pipes durability. This problem could be solved by using composite materials from fiberglass, which have required physical and mechanical properties for oil pipes. The durability and strength can be monitored by a fiberglass winding method, number of layers in composite material and high corrosion-resistance properties of fiberglass. Usage of high-strength composite materials in oil production is economically feasible; fiberglass pipes production is cheaper than steel pipes. Fiberglass has small volume weight, which simplifies pipe transportation and installation. In order to identify the efficiency of using high-strength composite materials at oil production sites we conducted a research of their physical-mechanical properties and modelled fiber pipe destruction process.
The article deals with the transportation problems of high-viscosity and high pour point crude oil through pipelines. The possibility of a structural oil movement mode development during transportation below the pour point is analyzed. The results of the experiment for unevenness of the heat flux identification in the underground pipeline are given.
The way of pipeline construction in areas of high seismic activity. Plates, which located on the ground surface and fixed in the ground by means of four supports, are used to compensate for the seismic loads. On each shoulder by a hinge to rotate in a vertical plane passing through the longitudinal axis of the pipe installed two-arm lever, one arm of which is oriented perpendicular to the longitudinal axis, and its hinged to tie attached to it, and the second arm is oriented at a right angle to the shoulder is directed along the axis of the pipeline and is pivotally connected to the rod.
The paper discusses possible ways of transporting liquefied natural gas (LNG), compares the estimated capital cost of the projects on marine and pipeline transportation of LNG and argues for the economic efficiency of LNG transfer pipelines. The authors offered the most likely options pipelines and LNG method of calculation of hydraulic parameters.
The paper presents and analyzes the construction of the movable-belt conveyor on sliding supports developed at the Mining Transport Machine Department, the Saint Petersburg State Mining Institute. Its advantages over the existing analogues including conveyors with magneticcushion supports are substantiated.
The experimental research is made in the laboratory of hydrotransport. It includes determination of rheological properties of copper-zinc ore’s high-concentrated hydromixtures. As a result there is a mathematical description of its flow in the pressure head pipeline.
The analysis of operating conditions of above-ground slurry pipelines of mining enterprises in conditions of negative temperatures is carried out. The results of theoretical and experimental studies of the heat exchange process in the two-phase flow taking into account the distribution of velocity and concentration of the solid phase across the cross section of the pipe are presented.
Течение вязкопластичных гидросмесей по трубопроводам сопровождается перераспределением концентрации твердой фазы по сечению потока. При структурном режиме течения и линейном характере распределения твердой фазы концентрация в ядре потока и в кольцевом пространстве составляет соответственно 1,6 и 0,8 от исходного содержания твердого.
Существующие запасы окисленных никелевых руд Республики Куба состоят из лимонитовой (железистой) и серпентинитовой (магнезиальной) фракций, при этом серпентиниты составляет примерно одну треть запасов. Технологический процесс переработки серпентинитовых руд на предприятии имени Педро Сото Альба и разница геодезических высот между заводом и месторождением делают более выгодным применение самотечного гидротранспорта обогащенного минерала до металлургического завода как наиболее экологически чистого вида транспорта продуктов обогащения и к тому же не требующего снабжения энергией. Однако состав твердой фазы пульпы создает определенные трудности для ее движения ...
При сейсмическом воздействии на трубопровод, закрепленный на опорах, колебания слагаются из поперечной и продольной составляющей. Поперечная волна большой амплитуды может явиться причиной аварийного останова гидротранспортной линии ...
