Liquid level measuring meter

Abstract

The invention relates to a liquid level measuring meter which is characterized by comprising a pressure-sensing capsule, a pressure-sensing capsule supporting frame, a pressure-transmitting medium, apressure-leading pipe, a liquid level viewing window, a ring-shaped plate, a ring-shaped sealing gasket and a hole-opening cover assembly, wherein the ring-shaped plate is tightly fixed with the pressure-leading pipe, the hole-opening cover assembly and the ring-shaped sealing gasket; the pressure-sensing capsule supporting frame is provided with a pressure-sensing capsule which is connected withthe pressure-leading pipe and the hole-opening cover assembly; the pressure-sensing capsule is internally filled with the pressure-transmitting medium; and the pressure-leading pipe is communicated with the liquid level viewing window. The liquid level measuring meter has the following advantages: separating the liquid medium to be measured and the liquid level viewing window, transmitting pressure by the pressure-transmitting medium, avoiding the phenomenon that the liquid medium is contaminated and adhered on the liquid level viewing window to cause that the liquid level can be measured accurately or can not be measured, having the comprehensive advantages of a direct measuring method and a pressure method, eliminating the influence of dissolved gas and foam to the yield measuring resultwhen measuring the yield of thick oil in formation testing operation, having higher measuring accuracy, thus being applicable to liquid level measurement of various types of liquid mediums.

Description

technical field [0001] The invention belongs to a liquid level measuring instrument in the petroleum industry, in particular to a liquid level measuring instrument. Background technique [0002] Formation testing is an indispensable and important means to understand the characteristics of formations and oil and gas layers and determine the parameters of oil and gas layers in the process of oil and gas field exploration and development. At present, due to the differences in the physical characteristics of heavy oil in different heavy oil formations (reservoirs), that is, the differences in the density and electrical characteristics of heavy oil, especially the strong adhesion of heavy oil, various contact detection fluids Position equipment cannot be used in formation test operations of heavy oil exploration wells and evaluation wells. The optical method in the non-contact liquid level detection method can only be used for fixed-point detection and control, and it is not eas...

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Problems solved by technology

At present, due to the differences in the physical characteristics of heavy oil in different heavy oil formations (reservoirs), that is, the differences in the density and electrical characteristics of heavy oil, especially the strong adhesion of heavy oil, various contact detection fluids Potential tools cannot be used in the field of heavy oil exploration wells and evaluation wells for formation testing

The optical method in the non-contact liquid level detection method can only be used for fixed-point detection and control, and it is not easy to carry out continuous measurement. The thermal method is only suitable for measuring the liquid level of high-temperature molten metal. The nuclear radiation method is not suitable due to its harmfulness to the human body. For drilling operation platform

For microwave and ultrasonic methods, when the dielectric constant of the measured medium is low, or the liquid level is turbulent, or there are bubbles in the medium, or foam on the liquid surface, it will cause the attenuation of the microwave or ultrasonic signal and affect the measurement results. correctness

Because heavy oil contains dissolved and free gas, the heavy oil production measured by other methods except the pressure method is higher than the actual, and sometimes the error is even large, which will affect the correct evaluation of production capacity and the correct formulation of development plans , which is related to the economic effect of development

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