Multiphase flow measurement

A liquid flow, multiphase mixture technology, applied in the field of multiphase flow measurement, which can solve the problems of measuring hold-up and WLR, increasing cost, and being unusable.

Inactive Publication Date: 2010-08-11
PRAD RES & DEV LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Existing methods are able to provide good accuracy for metering gas flows with high GVF, however, liquid rate metering accuracy is relatively poor
Disadvantages of this approach also include increased costs associated with the separation device and mixing device and additional pressure drop in the pipeline and / or disruption to flow in the pipeline due to the introduction of the separation device and / or mixing device into the pipeline
Also, at high GVF, the hybrid method may not be used to accurately measure holdup and WLR because the liquid holdup is very low under these conditions

Method used

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Examples

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Embodiment Construction

[0022] The following description only provides preferred exemplary embodiment(s), and is not intended to limit the protection scope, applicability, or structure of the present disclosure. On the contrary, the subsequent description of the preferred exemplary embodiment(s) will provide those skilled in the art with instructions for being able to implement the preferred exemplary embodiment. It should be understood that various changes can be made to the function and arrangement of the elements without departing from the spirit and protection scope of the appended claims.

[0023] In some aspects, the time-of-flight ultrasonic transducer can be positioned close to or above the centerline of the pipe or on the pipe where the gas phase can flow in the pipe to measure the gas phase in the pipe . Ultrasonic pulse Doppler probe(s) and / or electromagnetic (EM) transmitters and receivers can be arranged around the bottom part of the pipe or at a location where laminar flow can allow the l...

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Abstract

Methods and systems are described that provide for measuring flow properties of multiphase mixtures within a pipe carrying gas-liquid hydrocarbons and water produced from oil-gas wells. The methods and systems may provide for a combination of a clamp-on ultrasonic gas flow meter to measure flow characteristics of a gas phase in a pipeline and a pulsed ultrasonic Doppler sensor(s) and / or an RF / microwave electromagnetic sensor(s) to measure flow characteristics of a liquid phase. The combination of sensors may provide for multiphase flow measurements under certain flow conditions, such as when the gas-liquid is flowing in a substantially horizontal pipeline, when the flow is stratified or is caused to be stratified and / or the like.

Description

[0001] Cross references to related applications [0002] This application claims the rights and interests of pending U.S. Provisional Application No. 60 / 973,362 filed on September 18, 2007, and is a continuation of said application, which is specifically incorporated herein by reference in its entirety. [0003] This application relates to the U.S. Patent Application No._ (Attorney No. 57.0824US NP) entitled "MEASURINGPROPERTIES OF STRATIFIED OR ANNULAR LIQUID FLOWS IN AGAS-LIQUID MIXTURE USING DIFFERENTIAL PRES SURE" filed on the same day as this application. ), the application is incorporated herein by reference in its entirety. [0004] U.S. Patent No. 6,758,100 filed on June 4, 2001 is specifically incorporated herein by application in its entirety. Technical field [0005] The present disclosure generally relates to multiphase flow measurement of oil and gas wells, but not in a restrictive manner to high gas volume flow fraction / retention and / or velocity / flow measurement. Backgr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/00G01F1/66G01F1/74G01F1/7082
CPCG01F1/74G01F1/667G01F1/663G01F1/7082G01F3/30
Inventor 黄松明谢成钢伊恩·阿特金森
Owner PRAD RES & DEV LTD
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