Blade type oil, gas and water multiphase booster pump

Abstract

A vane type oil-gas-water multiphase booster pump, comprising at least a booster device, a bearing and a sealing device, and a power device, the booster device and the rotating shaft of the power device are arranged concentrically, and are fixed on the respective rotating shafts through the bearing and the sealing device , the supercharging device is connected with the power unit through a coupling, the power unit drives the supercharging device to work, the multiphase fluid is boosted in the supercharging device and then output, and the supercharging device is a suction unit, a multiphase supercharging unit, The final diffuser and pressure chamber. The invention takes into account the performances of both the vane pump and the compressor, and the optimized vane multiphase pump can avoid or delay the occurrence of phase separation between gas and liquid in the flow channel of the impeller, improving the performance of the vane pump when transporting multiphase fluids; It adopts an open structure, and a sand discharge hole is set on the pump casing, which can be used to transport mixed media containing sand; the power drive device adopts a frequency conversion device, cooperates with a multiphase fluid buffer homogenizer and an automatic monitoring system to ensure that the multiphase pump has good work efficiency. condition performance.

Description

Technical field: [0001] The invention relates to a multiphase booster pump, in particular to a vane type oil-gas-water multiphase booster pump, which belongs to the technical fields of mechanical manufacturing and multiphase flow. Background technique: [0002] In the late 1980s, with the transformation of the oil industry from land to oceans and deserts with relatively harsh natural environments, from relatively concentrated large oil and gas fields to the development of small marginal oil and gas fields and satellite oil fields, long-distance Oil and gas multiphase mixed transportation technology, which transports untreated multiphase well flow, has attracted extensive attention from major oil companies for its remarkable technical advantages and considerable economic benefits. However, due to the complexity of multiphase flow and the limitations of our understanding of multiphase flow, in the long-distance transportation of oil, gas and water multiphase well flow, the tra...

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Problems solved by technology

[0005] The multiphase pumps developed in China are basically volumetric multiphase pumps. Taking the twin-screw multiphase pump as an example, its typical characteristics are medium and small flow rates and medium to high pressure. The experimental prototype of the twin-screw pump multiphase pump currently developed in my country Most of them are low-to-medium pressurized and sensitive to solid particles. Under the same design conditions, compared with vane machines, their size and weight are larger; for traditional vane pumps, due to the centrifugal force during high-speed rotation, they have Liquids and gases with different properties are prone to phase separation, which leads to a sharp decrease in the efficiency of the pump or even failure to work under the condition of gas-liquid two-phase flow. When the volume content of the inlet gas reaches 4%, the efficiency of the conventional centrifugal pump decreases rapidly. , when the inlet gas volume content exceeds 10%, it basically cannot operate; when the inlet gas content exceeds 20%, the efficiency of the axial flow pump decreases sharply until it loses its boosting capacity

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