Ejector

Abstract

The invention provides an ejector. The ejector comprises an ejection gas fluid inlet, an ejected gas fluid inlet, an ejection nozzle, a contraction cavity, a throat pipe and a diffuser pipe, wherein the ejection gas fluid inlet is connected with the ejection nozzle, and the end, away from the ejection gas fluid inlet, of the ejection nozzle is connected with the contraction cavity; the ejected gas fluid inlet is connected with the contraction cavity; and the two ends of the throat pipe are connected with the contraction cavity and the diffuser pipe respectively; the nozzle is of a necking structure. The ejector can increase the flow speed of fluid passing through the nozzle in the ejection process and reduce pressure loss, thereby improving ejection efficiency.

Description

technical field [0001] The invention belongs to the technical field of water-producing gas well production devices, and in particular relates to an ejector. Background technique [0002] Most gas wells have been developed to the middle and late stages, and the number of low-pressure wells and intermittent wells has been increasing, and the wellhead pressure is low, and they are close to production shutdown, so they cannot be effectively exported. At the same time, due to the differences in production time and production system, there are still some high-pressure and high-yield wells, which still maintain relatively high pressure. High-pressure gas wells need to be throttled and depressurized before they can enter the export pipeline. In view of the difficulty of exporting low-pressure gas at the wellhead, ejectors are usually used to pressurize the low-pressure gas and then enter the gas field gathering and transportation pipeline network for export. After the low-pressure...

AI Technical Summary

Problems solved by technology

However, in the prior art, when there is a gas-liquid two-phase in the injection process of the wellhead of the water-producing gas well, there is a problem that the pressurization effect of the ejector is low

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