[특허]Method and system for measuring multiphase flow using multiple pressure differentials

[미국특허] Method and system for measuring multiphase flow using multiple pressure differentials 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01F-001/74
출원번호	US-0401375 (1999-09-22)
발명자 / 주소	Fincke James R.
출원인 / 주소	Bechtel BWXT Idaho, LLC
대리인 / 주소	Workman Nydegger & Seeley
인용정보	피인용 횟수 : 20 인용 특허 : 6

초록 ▼

An improved method and system for measuring a multiphase flow in a pressure flow meter. An extended throat venturi is used and pressure of the multiphase flow is measured at three or more positions in the venturi, which define two or more pressure differentials in the flow conduit. The differential pressures are then used to calculate the mass flow of the gas phase, the total mass flow, and the liquid phase. The method for determining the mass flow of the high void fraction fluid flow and the gas flow includes certain steps. The first step is calculating a gas density for the gas flow. The next two steps are finding a normalized gas mass flow rate through the venturi and computing a gas mass flow rate. The following step is estimating the gas velocity in the venturi tube throat. The next step is calculating the pressure drop experienced by the gas-phase due to work performed by the gas phase in accelerating the liquid phase between the upstream pressure measuring point and the pressure measuring point in the venturi throat. Another step is estimating the liquid velocity in the venturi throat using the calculated pressure drop experienced by the gas-phase due to work performed by the gas phase. Then the friction is computed between the liquid phase and a wall in the venturi tube. Finally, the total mass flow rate based on measured pressure in the venturi throat is calculated, and the mass flow rate of the liquid phase is calculated from the difference of the total mass flow rate and the gas mass flow rate.

대표청구항 ▼

[ I claim:] [1.]1. A method for finding a gas mass flow rate, and a total mass flow rate of a combined flow having a liquid phase and gas phase, using an extended throat venturi having a contraction and a throat, comprising the steps of:(a) calculating a normalized gas mass flow rate based on measured pressure differences across the venturi contraction and throat;(b) computing a gas mass flow rate in the throat using the normalized gas mass flow rate, venturi throat geometry, a gas density, and a contraction ratio of the venturi;(c) estimating gas velocity in the throat using the gas mass flow rate;(d) calculating a pressure drop experienced by the gas phase due to work performed by the gas phase in accelerating the liquid phase between an upstream pressure measuring point prior to the venturi and a pressure measuring point in the throat;(e) estimating liquid velocity in the throat using the calculated pressure drop from step (d);(f) computing a friction value between the liquid phase and venturi wall using the liquid velocity; and(g) calculating the total mass flow rate based on measured pressure difference in the throat, the friction value and the gas velocity.

이 특허에 인용된 특허 (6) 인용/피인용 타임라인 분석

Sabin Cullen M. (Solana Beach CA) Poppendiek Heinz F. (La Jolla CA), Means and techniques useful in mass flowmeters for multiphase flows.
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Segeral Gerard (Gif-sur-Yvette FRX) Long Peter (Harlton GB3) Atkinson Ian (Bailly FRX), Method and apparatus for measuring multiphase flows.
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Rajan Varagur Srinivasa V.,CAX ; Ridley Rodney Keith,CAX, Multi-phase fluid flow measurement apparatus and method.
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Herzl Peter J. (Morrisville PA), System for determining the ratio of oil to water in a metered fluid stream.
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Boll ; deceased Richard H. (late of Alliance OH by United National Bank & Trust Co. ; executor) Ghering Walter L. (Alliance OH), System for measuring entrained solid flow.
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Agar Joram (Grand Cayman KYX), Two and three-phase flow measurement.
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이 특허를 인용한 특허 (20) 인용/피인용 타임라인 분석

Nyfors, Ebbe; Bø, Øystein Lund, Compact flow meter.
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Wehrs, David L.; Miller, John P.; Klosinski, Andrew J., Differential pressure based flow measurement.
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Srinivasan, Radhakrishnan, Estimating flow rates in open-channel geometries having capillary pumping vanes.
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Steven, Richard, Flow metering.
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Pelletier, Michael T., Formation fluid sampling control.
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Lund, Jonathan Stuart, Measuring a gas mass fraction.
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Wee, Arnstein; Skjaeldal, Ingve Morten, Method and apparatus for measurement of composition and flow rates of a wet gas.
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Wee, Arnstein, Method and apparatus for measuring the conductivity of the water fraction of a wet gas.
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Wee, Arnstein; Skjaeldal, Ingve Morten, Method and apparatus for tomographic multiphase flow measurements.
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Wee, Arnstein; Skjaeldal, Ingve Morten, Method and apparatus for wet gas flow measurements and measurement of gas properties.
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Wee,Arnstein, Method and flow meter for determining the flow rate of a multiphase fluid.
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Poulisse,Henk Nico Jan, Method and system for production metering of oil wells.
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Allen, Thomas E., Method for determining absolute density of cement slurry.
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Allen, Thomas E., Method for determining absolute density of cement slurry.
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Foss, Gary C., Multi-phase flow meter for crude oil.
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Fincke, James R., Multiphase flow calculation software.
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Fincke, James R., Oil field management system.
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Badenhorst, Sean Michael Johl, System and method for delivering air.
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Fincke, James R., System for measuring multiphase flow using multiple pressure differentials.
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Graham, Troy Darcy; Olson, Andrew Kent; Walker, Justin Lewis; Oran, Kenan, Systems and methods for managing large oil field operations.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Method and system for measuring multiphase flow using multiple pressure differentials 원문보기