Oil well gas-liquid mixed conveyor

Abstract

The oil well gas-liquid mixture conveyer consists of gas-liquid mixture conveying pump and gas-liquid separator connected via pipes. Oil well gas-liquid mixture entered by the inlet pipe is pressure raised in the pump before entering the gas-liquid separator by the outlet pipe. Partial liquid from the gas-liquid separator is returned via the lower outlet and reflux pipe to the inlet of the gas-liquid mixture conveying pump, and the separated gas and the other part of the liquid are output via the upper outlet and outer pipe. The reflux liquid flow rate is adjusted by the adjusting valve. The present invention has lowered gas / liquid ratio into the pump to avoid gas lock and to ensure the normal operation of the pump.

Description

technical field [0001] The invention relates to a device for transporting oil well mixed gas and liquid. Background technique [0002] In oil field oil recovery operations, the oil pumped from the oil well is a mixed gas-liquid mixed with water and natural gas, and its gas-liquid ratio (that is, the volume ratio of the gas phase to the liquid phase in the mixed gas-liquid) is constantly changing. In the prior art, the mixed gas-liquid produced by the oil well is generally directly boosted by the gas-liquid mixed transport pump and then transported to the transfer station or the joint processing station. The above-mentioned gas-liquid mixed delivery pump is a volumetric pump composed of a pump body, a screw installed in the pump body and engaged with each other, and a mechanical seal. It uses axial extrusion to increase the pressure of the mixed gas-liquid. When the gas-liquid ratio of the gas-liquid mixture increases (that is, when it contains more gas), an air lock is easi...

AI Technical Summary

Problems solved by technology

When the gas-liquid ratio of the gas-liquid mixture increases (that is, when it contains more gas), an air lock is easily formed in the pump body of the gas-liquid mixed pump, which causes dry friction between the mechanical seal and the screw of the gas-liquid mixed pump and a large amount of heat , which in turn leads to damage to the mechanical seal, resulting in oil leakage or damage to the screw, resulting in a sharp drop in pump efficiency. In severe cases, it may even cause the entire gas-liquid mixed pump to be completely damaged and unable to work.

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