DEVELOPMENT OF TECHNOLOGY FOR EXTRACTION OF HIGH-VISCOSITY OIL AT COOLANT RECIRCULATION

Development of high-viscosity oil required new technologies that would help reduce the cost of oil extraction. This problem has not been solved in full. The ongoing research considers a technology, which uses the pumping equipment to solve two technical problems. The first task refers to the lifting of the extracted oil from the face to the wellhead. The second task is in the creation of a coolant recirculation loop in the productive reservoir. Extracted oil acts as coolant in this case. As demonstrated by laboratory tests, the new technology can be made based on a centrifugal pump, a vortex pump, or a volumetric pump. Well conditions see as the most promising variants those with a volumetric pump or variants with a vortex pump, since these designs are more efficient when pumping highly viscous liquids. The research work considers the questions on the sequential connection of processing chambers in a multi-sectional volume pump. Considering the peculiarities of the applied kinematic scheme, the rotor balancing in the pump is performed with the help of the angular displacement of the stator elements and the rotor elements in separate sections. In bench tests of the heat generator, circulating chambers constructed based on a centrifugal pump, a vortex pump, a volumetric pump and a volumetric-dynamic type were tested in laboratory conditions. The developed heat generator implements cycles with periodic supply of heat energy to the productive reservoir. The developed technology can also be used in combination with other technologies for extraction of high-viscosity oil.