On-line sampling device for multi-phase flow liquid

Abstract

The invention relates to an on-line sampling device for multi-phase flow liquid. The device comprises a container which is uprightly installed, wherein the lateral surface of the upper end of the container is provided with a hole which is connected with an inlet pipeline, a spiral passage with a downward spiral angle is arranged in the container, and the inlet pipeline is connected with an inlet of the spiral passage; and the inner wall of the lower part of the container is welded with an annular liquid storage bin, 'L'-shaped diversion baffle plates are uniformly distributed on the inner wall of the container between the liquid storage bin and an outlet of the spiral passage, the upper end of the container is connected with a gas discharging pipeline, the lower end of the container is connected with a discharging pipeline of a process system, and the bottom of the liquid storage bin is connected into a liquid sampling and discharging pipeline. The device has the advantages of novel design, simple structure, elimination of movable component, high safety and reliability, convenience in installation, low cost, good applicability, high sampling quantity and high sampling accuracy and has obvious significance for reducing the product cost of a multi-phase metering product and improving the measurement accuracy of the phase division rate.

Description

technical field [0001] The invention relates to the technical field of liquid sampling for on-line non-separated metering products in the production process of oil field, in particular to an on-line multi-phase flow liquid sampling device. Background technique [0002] Oil well production measurement is one of the essential basic tasks in the process of reservoir performance research and oilfield production management. In recent years, multiphase flowmeters have been favored by more and more oil companies in terms of oil well production measurement due to their comparative advantages in advanced technology and cost investment. Among them, gamma ray measurement is not affected by fluid phase changes It is widely used due to the advantage that the impact and measurement parts are not in contact with the fluid; however, under the condition of oil-gas-water three-phase fluid, the measurement accuracy of water cut decreases with the increase of gas content, that is, under the con...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to avoid the poor representativeness of manual sampling, and the disadvantages of complex structure, high cost and poor applicability after adding the gas-liquid separator. The special design structure is used to realize the online automatic sampling of the liquid, and the sampling representativeness is not affected. A new type of multi-phase flow liquid on-line sampling device that can simplify the product structure, improve the applicability of the product, and improve the accuracy of water content measurement due to the influence of changes in working conditions, medium viscosity, pressure, and temperature.

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