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Capillary Viscometer and Method for Measuring Fluid Viscosity

A technology of viscosity measurement and capillary tube, which is applied in the direction of direct current flow characteristic measurement, etc., can solve the problems of sample physical property change, sample waste, and can no longer be reused, so as to achieve the effect of improving utilization rate, high measurement efficiency and improving measurement accuracy

Inactive Publication Date: 2018-06-26
BEIJING RUILAIBO PETROLEUM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual measurement, it is often necessary to perform multiple measurements on the sample. After the sample is measured once, if the sample flows out directly, the physical properties of the sample will change due to the change of conditions, and it cannot be reused, resulting in waste of the sample.

Method used

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  • Capillary Viscometer and Method for Measuring Fluid Viscosity

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Embodiment Construction

[0028] Such as figure 1 As shown, the capillary viscometer of the present invention comprises a piston container 1, a sample dispenser 2, a sample storage container 3, a capillary 4, a differential pressure measurement module, a vacuum device, and the outlet of the pressure tracking pump 5 is connected to the piston container through the first pipeline 11. 1, the first valve 12 is connected in series on the first pipeline 11, and the second valve 13 is installed at the outlet of the piston container 1.

[0029] The outlet of the manual pump 6 is communicated with the sample storage container 3 through the pipeline, and the outlet of the sample storage container 3 is connected with the sampling pipeline 31, and the sampling valve 32 is connected in series on the sampling pipeline 31, and the sampling pipeline 31 passes through the first branch respectively. The pipeline 33 and the second branch pipeline 34 are connected with the capillary 4 and the sample dispenser 2, the fourt...

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Abstract

The invention belongs to the technical field of liquid viscosity measurement, and provides a capillary viscosity measuring instrument and fluid viscosity measuring method. The capillary viscosity measuring instrument can increase the sample utilization rate and improve the measurement precision. The capillary viscosity measuring instrument comprises a piston container, a sample preparing device, a sample storage container, and a capillary. The sample in the sample storage container is injected into the sample preparing device and capillary through a manual pump. A precise displacement pump is used to carry out constant flow injection to make the sample flow in the capillary. The viscosity can be measured by collecting the data of pressure difference and flow. The measuring efficiency is high. During the measuring process, the system pressure is adjusted and controlled by a pressure tracing pump and the piston container to make the system pressure be in a stable state, thus the measurement precision is improved, moreover, the sample is collected by the piston container, the reutilization of sample is realized, the sample utilization rate is improved, and the sample preparing device is used to mix sample, can prevent the degassing phenomenon of gas-containing samples during standing period, and thus improves the measurement precision.

Description

technical field [0001] The invention belongs to the technical field of liquid viscosity measurement, in particular to a capillary viscometer and a method for measuring fluid viscosity. Background technique [0002] At present, there are many methods for measuring fluid viscosity, among which the capillary method is the most commonly used one. However, there are still not many viscosity measuring devices for formation conditions and high-temperature and high-pressure fluids, and the accuracy is not high. Many existing capillary tube viscosity measurement equipment, when measuring the original sample, is injected into the capillary line system for measurement after being prepared by external equipment, which will inevitably cause changes in the physical properties of the sample during the standing process of the sample. In addition, in order to provide system pressure, a back pressure valve is generally used to control the system pressure. Since the control accuracy of the ba...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N11/08
CPCG01N11/08
Inventor 刘文杜军军
Owner BEIJING RUILAIBO PETROLEUM TECH
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