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Positive displacement mass flowmeter for multiphase flows

A mass flow meter, multiphase flow technology, applied in the direction of indirect mass flow meter, mass flow measurement device, measurement capacity, etc., can solve the problems of inapplicability, inability to measure oil and gas wells, and lower flow rate, and achieve the effect of simple measurement

Active Publication Date: 2017-01-11
LANZHOU HAIMO TECH CO LTD
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Problems solved by technology

However, since the Venturi is a momentum flowmeter, such a multiphase flowmeter often has a high flow limit, and cannot measure oil and gas wells with low production, especially for intermittent multiphase flow, this method is Not applicable at all, unable to accurately measure the flow rate of intermittent multiphase flow

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  • Positive displacement mass flowmeter for multiphase flows

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Embodiment Construction

[0025] The definition of each term is firstly given below, and then the measurement method of using the positive displacement mass flowmeter of the present invention to measure the respective mass flow rates of oil, gas and water in multiphase flow will be described in conjunction with the accompanying drawings.

[0026] "Mass flow rate" refers to the mass of fluid flowing per unit time. In the SI unit system, its dimension can be kg / s.

[0027] "Mass phase fraction" refers to the mass percentage of each phase in the multiphase flow, and meets the following conditions: OMF+WMF+GMF=1, where OMF represents mass oil fraction, WMF represents mass water content, and GMF represents mass content Gas rate.

[0028] "Gamma ray mass phase fractionator" is a device known in the art, comprising a combined structure of a gamma emitter, a receiver, an arithmetic module and a display / output, wherein the radiation source in the gamma ray emitter can be a dual Energy radiation source (emits g...

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Abstract

The invention provides a positive displacement mass flowmeter for multiphase flows. The mass flowmeter comprises the following members of a gamma ray mass phase fraction meter (1), a flow division switching valve (3) and two identical multiphase fluid mass measuring containers (4) connected in parallel, wherein the gamma ray mass phase fraction meter (1) is located on a multiphase flow conveying main pipeline (2); the multiphase flow conveying main pipeline is divided into two branch pipelines by the flow division switching valve (3); each of the two multiphase fluid mass measuring containers (4) is located in the downstream of each branch pipeline, a gas-liquid separator (5) is arranged between each branch pipeline and the corresponding measuring container, a differential pressure transducer (6) is mounted on each measuring container and provided with a pressure guide port in the bottom of the corresponding container, a gas outlet pipeline (7) is arranged at the top of each measuring container, and a discharging outlet pipeline (8) and a discharging switching valve (9) are arranged at the bottom; the gas outlet pipelines and the discharging outlet pipelines are converged outside the measuring containers to form the multiphase flow conveying main pipeline; a counter is arranged on the flow division switching (3) or the discharging switching valve (9) and used for counting liquid emptying times of the measuring containers.

Description

technical field [0001] The invention belongs to the field of mass flow metering of multiphase flow. Specifically, the present invention relates to a positive displacement multiphase flow mass flowmeter and a measurement method for measuring the respective mass flows of oil, gas and water in the multiphase flow by using the flowmeter. Background technique [0002] In the oil and gas industry, oil and gas well products contain both liquid phase crude oil and water, and the gas-liquid mixed fluid of gas phase natural gas, which is called multiphase flow in the industry. Wherein said gaseous phase comprises such as the natural gas produced by oil and gas wells or any non-condensable gas at normal temperature, specifically as methane, ethane, propane, butane etc.; said liquid phase may comprise: oily phase, such as crude oil itself and in Liquid additives dissolved in crude oil during crude oil production, as well as water phases, such as formation water, water injected into oil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/88G01F15/08
CPCG01F1/88G01F15/08Y02E30/30
Inventor 陈继革徐斌吴治永
Owner LANZHOU HAIMO TECH CO LTD
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