Dubei O. Improving Efficiency of the Sucker Rod Pump Units by Using Oil-Gas Jets

The thesis is devoted to improving operation efficiency of the oil extraction equipment, including sucker rod pump units, by using oil-gas jets. In order to implement oil-gas jets, placed above the flowing level in oil wells that are operated by sucker rod pumps, oil well parameters were calculated. These parameters will be the characteristics of the work and injected flows inside of a jet. Among them there are: pressure, temperature, density of the gas-water-oil mixture, average integral velocity of this mixture along the borehole axis, the volume of gas that is inflowing to the annular space and many other. Assuming that work and mixed flows inside of a jet are homogeneous, equations of the high- and low-pressure oil-gas jets were obtained. We developed a technique of using these equations for practical calculations. The accuracy of the obtained equations was tested when applied to water-air jets. Laboratory experimental study was performed for water-air and water-carbon dioxide jets. It confirmed the possibility of such jet's operation with a "back pressure" (the magnitude of the "back pressure" during the experiments reached up to 0.05 MPa). A technique was created that allows to determine the efficient location of jets in oil wells and their geometrics. When developing this technique it was necessary to take into account two conditions: the whole amount of petroleum gas, which enters the annular space of the well, must pass through the oil-gas jet, minimize the stem loading. This technique is implemented for the oil well 753-D OGPD "Dolynanaftogaz".