Two-screw multiphase pump device suitable for working condition with high air void

Abstract

The invention relates to a two-screw multiphase pump device suitable for a working condition with a high air void, comprising a two-screw multiphase pump. An inlet temperature sensor and a gas-liquid separation and liquid reservoir are mounted on an inlet pipeline of the two-screw multiphase pump. The inlet and the outlet of the gas-liquid separation and liquid reservoir are respectively provided with a liquid reservoir inlet electromagnetic valve and a liquid reservoir outlet one-way valve, an outlet pipeline of the two-screw multiphase pump is provided with an outlet temperature sensor and an ejector inlet electromagnetic valve which is connected with an ejector inlet, an outlet pipeline at the lower part of the gas-liquid separation and liquid reservoir is connected with an inlet at the other side of the ejector through an ejector inlet one-way valve, and an ejector outlet is connected with a middle injection hole of the two-screw multiphase pump through an ejector outlet one-way valve. By adopting the ejector to eject liquid, the invention has the advantages of improving the middle pressure of the multiphase pump, moderating a pressure change curve, reducing leakage, improving the capacity efficiency and lowering the temperature of an exhaust.

Description

technical field [0001] The invention relates to a twin-screw mixed-transport pump device, in particular to a twin-screw mixed-transport pump device suitable for high gas content working conditions. Background technique [0002] In the existing mixed transportation of oil and gas, the mixed transportation pump can achieve the effect of pressurized transportation, and is especially suitable for the mixed transportation of oil and gas in oil fields in remote areas and shallow sea oil fields. The media transported by the mixed pump can include the transport of corrosive media, gas-containing media, sediment-containing solid particle media and high-viscosity media. When transporting a gas-containing medium with a gas content of more than 80%, since the liquid content in the medium is small when the gas content is high, the heat will accumulate in the interior after the gas is compressed at the same volume, and the temperature will rise, which will reduce the efficiency of the mix...

AI Technical Summary

Problems solved by technology

When transporting a gas-containing medium with a gas content rate of more than 80%, since the liquid content in the medium is small when the gas content rate is high, the heat will accumulate in the interior after the gas is compressed at the same volume, and the temperature will rise, which will reduce the efficiency of the mixed pump, and also The thermal deformation of the rotor in the pump will increase, and in severe cases, the rotor will be damaged.

Therefore, the current delivery of medium with high gas content will have an adverse effect on the life and reliability of the mixed pump.

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