Fluid holdup tool and flow meter for deviated wells

Measuring and testing – Borehole or drilling – Fluid flow measuring or fluid analysis

Patent

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Details

7315233, 7315221, 73 6146, 73 6149, 7386104, E21B 4710, G01N 1100, G01F 100, G01R 2722

Patent

active

056314132

ABSTRACT:
A production logging tool is provided for use within a well to directly measure a velocity profile of a multiphase fluid flow within a cross-section of a well. The production logging tool includes a tool housing from which a plurality of arms are radially extensible. The plurality of arms are rotatably mounted to the tool housing for rotating around a tool axis extending longitudinally through the tool housing. At least one Doppler flow sensor is fixedly mounted to one of the plurality of arms for moving with the arm to dispose the Doppler flow sensor within different localized regions within a cross-section of the well. The localized regions of the cross-section are located at different radial distances from and at different angular displacements around the tool axis of the tool housing, at points distal from the tool axis. The Doppler flow sensor has a depth of investigation for detecting flow velocities of a multiphase fluid flow proximate to the Doppler flow sensor, within the localized regions of the cross-section of the well. The plurality of arms are rotated about the tool housing to dispose the Doppler flow sensor within different ones of the localized regions disposed throughout the cross-section for measuring a velocity profile of the multiphase fluid flow through the cross-section of the well. Flow velocities are also preferably detected within localized regions disposed within the boundary layer of the multiphase fluid flow.

REFERENCES:
patent: 4166215 (1979-08-01), Anderson
patent: 4975645 (1990-12-01), Lucas
patent: 5205167 (1993-04-01), Gartner et al.
patent: 5485743 (1996-01-01), Taherian et al.
patent: 5531112 (1996-07-01), Young et al.
Article--"Proposed Downhole Ultrasonic Quadrant Flow Tool: Technology Background and Design Considerations" by Lawrence C. Lynnworth, Panametrics, Inc., 221 Crescent Street, Waltham, MA 02254, pp. 78-83.

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