Pressure control device for high-pressure micro-flow experimental system

Abstract

The invention discloses a pressure regulation and control device for a high-pressure micro-flow experiment system, and the device comprises a high-pressure gas tank. The interior of the high-pressure gas tank is slidingly provided with a gas tank piston, wherein one side of the gas tank piston is a first high-pressure gas space, and a side wall located at the other side of the gas tank piston is provided with an experiment system fluid inlet. The experiment system fluid inlet is communicated with an outlet of the high-pressure micro-flow experiment system. The device also comprises a high-pressure liquid regulation and control tank, and the interior of the high-pressure liquid regulation and control tank is slidingly provided with a liquid tank piston. One side of the liquid tank piston is a second high-pressure gas space, and the other side of the liquid tank piston is a high-pressure liquid space, wherein the second high-pressure gas space is communicated with the high-pressure liquid space. A side wall of the high-pressure liquid regulation and control tank is communicated with an auxiliary pressure adjustment system through a third connection pipe and a second valve, and the outlet of the auxiliary pressure adjustment system is opened. The device employs high-pressure gas energy-storage pressure stabilizing and micro-pipe auxiliary pressure adjustment, is high in pressure stabilizing precision, and is stable in pressure regulation and control.

Description

technical field [0001] The invention relates to the technical field of voltage stabilization and regulation for high-pressure experiments, in particular to a pressure regulation device for a high-pressure micro-flow experiment system. Background technique [0002] In the simulation experiments related to the exploitation of tight oil and gas reservoirs, the experimental pressure is very high, generally dozens or even nearly hundreds of MPa; in addition, because the microtube pores used in the experimental system are very small, the flow rate of the experimental fluid is ultra-low, generally Nanoliters / minute (that is, the flow unit is nL / min). Stable and accurate control of the high-pressure environment of the experimental system during the experiment is a technical difficulty that needs to be overcome urgently in the tight oil and gas reservoir development experiment. [0003] At present, there are two types of pressure control methods for high-pressure micro-flow experime...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a pressure control device for a high-pressure micro-flow experimental system, which overcomes the problems of relatively narrow pressure control range, low control precision, and fluctuations in pressure control in the prior art. The device utilizes high-pressure gas energy storage to stabilize Pressure and micro-pipe assisted pressure regulation, high precision of voltage regulation, stable pressure regulation without fluctuation

Images