Device for producing liquid film capable of adjusting thickness

Abstract

The invention discloses a device for producing a liquid film capable of adjusting thickness, which comprises an upper ring component and a lower ring component, The lower ring component comprises a metal conducting ring, a drainage layer, an annular cover plate and a soft pipe joint, a ring groove is provided on the upper surface of the metal conducting ring, the drainage layer and the ring groove form a sealed feed flow dead slot, the annular cover plate and an lower annular edge form an overflow groove, and the soft pipe joint enables external connection with a feed flow-pressure adjusting system and is communicated with the feed flow dead slot. When the feed flow-pressure adjusting system possesses positive pressure, liquid discharged by the drainage layer can press the liquid to be detected in the liquid film through the overflow groove, there by the liquid film is thickened; when the feed flow-pressure adjusting system possesses negative pressure, the air outside the film can not enter in the drainage layer, the liquid in the film overcomes the disjoining pressure and enters in the feed flow-pressure adjusting system through the drainage layer, thereby the liquid film is thinned. When the liquid film reaches the required thickness, a certain pressure difference is kept inside and outside the film, so that the adjustable and controllable liquid film thickness can be realized.

Description

technical field [0001] The invention relates to a device for measuring the physical and chemical properties of a foam film, in particular to a device for measuring the dynamic mechanical properties of a foam film (also known as a free liquid film, hereinafter referred to as a liquid film), and measuring the separation pressure of a foam film. Liquid film generator. Background technique [0002] Foam systems are widely used in industrial and agricultural production and daily life. With the development of the petroleum industry, people are increasingly using foam in exploration, development and oil recovery fields such as drilling, fracturing, acidizing, and tertiary oil recovery. The most important characteristic of a foam system is foam stability. Previous studies have shown that solution surface viscoelasticity has an important influence on foam stability, but it needs to be emphasized that this surface viscoelasticity is measured on a rather deep solution surface. "A Ne...

AI Technical Summary

Problems solved by technology

Although the approximate thickness of the liquid film can be roughly judged based on the conductance data of the liquid film, and the thickness of the liquid film can be controlled within a certain range by cutting off the drainage outlet, it is difficult to obtain a liquid film with a relatively consistent thickness that can be repeated.

More importantly, in experiments comparing the performance of different foaming fluids, it is not meaningful to use liquid films with inconsistent thickness

In addition, the thinning process of the liquid film in the above method is irreversible, and when the liquid film is very thin, the gravity drainage speed is very slow, and it takes a long time to obtain a thin liquid film of the required thickness.

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