Utilization device for pressure energy of gas well of natural gas

Abstract

The invention discloses a utilization device for pressure energy of a gas well of natural gas. The device comprises a high-pressure gas inlet pipe, a low-pressure gas inlet pipe, a mixed medium-pressure gas exhaust pipe, a mixing chamber, an ejector, a nozzle and a mixed pressure diffusion pipe; the high-pressure gas inlet pipe is arranged perpendicular to the low-pressure gas inlet pipe, the mixed medium-pressure gas exhaust pipe is arranged parallel and opposite to the high-pressure gas inlet pipe, and the mixed medium-pressure gas exhaust pipe and the high-pressure gas inlet pipe are connected perpendicular to the low-pressure gas inlet pipe; the mixing chamber is a space formed by communicating of the high-pressure gas inlet pipe, the low-pressure gas inlet pipe and the mixed medium-pressure gas exhaust pipe; the ejector comprises an adjustable cone, wherein the adjustable cone is arranged in the high-pressure gas inlet pipe; the nozzle is arranged inside the high-pressure gas inlet pipe and the low-pressure gas inlet pipe, and the nozzle externally sleeves the lower portion of the adjustable cone; and the mixed pressure diffusion pipe is arranged in the mixed medium-pressure gas exhaust pipe. The device has the advantages that through the adjustable natural gas ejector pressurizing structure, during pressure change of the gas well, the ejector structure is adjusted to maximally utilize the pressure energy of the high-pressure natural gas well so as to pressurize the low-pressure natural gas well.

Description

technical field [0001] The invention relates to the field of natural gas development, in particular to a device for utilizing pressure energy of natural gas wells. Background technique [0002] In the process of natural gas exploitation, due to the different development layers and development time of each gas well in the gas field, there will be high-pressure gas wells and low-pressure gas wells in the same gas field at the same development stage (especially in the middle and late stages of development). In order to meet the requirements of the export pipeline, high-pressure gas needs to be throttled and depressurized, resulting in a huge waste of natural gas pressure energy; while the pressure of low-pressure gas is lower than the pressure of the export pipeline network, it cannot enter the pipeline network, and it needs to be pressurized to achieve export, increasing power consumption. [0003] At present, devices that use gas pressure to pressurize natural gas include ex...

AI Technical Summary

Problems solved by technology

[0005] However, the existing ejectors all adopt a fixed structure, and the structure of the nozzle and diffuser is set according to the initial parameters of the work, which cannot adapt to changes in the pressure and flow of natural gas

As the development of the gas field enters the middle and later stages, the wellhead pressure of the gas well decreases rapidly, which causes the boosting effect of the fixed ejector to significantly weaken, or even fail to achieve the boosting effect

Images