Flow rate measurement using unsteady pressures
AssigneeWeatherford/Lamb, Inc.
InventorsDaniel L. Gysling, Rebecca S. Bryant, Charles R. Winston
Life of this patent
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Abstract
According to one embodiment of the present invention, the apparatus comprises a first filter for measuring a pressure field at a first axial location along the pipe and providing a first pressure signal indicative of the vortical pressure field. The apparatus further comprises a second filter for measuring the vortical pressure field at a second axial location along the pipe and providing a second pressure signal indicative of the vortical pressure field. The apparatus further comprises a signal processor, responsive to the first and the second pressure signals, which provides a velocity signal indicative of a velocity of the vortical pressure field moving in the pipe.
Claims180
An apparatus for measuring a velocity of a fluid moving in a pipe, the fluid containing inhomogenous pressure disturbances, comprising:
- a first filter for measuring the inhomogenous pressure disturbances at a first axial location along the pipe and for providing a first pressure signal;
- a second filter for measuring the inhomogenous pressure disturbances at a second axial location along the pipe and for providing a second pressure signal;
- and
- a logic processing system, responsive to the first and the second pressure signals, for providing a velocity signal indicative of the velocity of the fluid in the pipe.
An apparatus for measuring a velocity of a fluid moving in a pipe, the fluid containing inhomogenous pressure disturbances, comprising:
- a plurality of pressure sensors attached to the outside of the pipe for measuring the inhomogenous pressure disturbances at a plurality of axial locations along the pipe, each sensor providing a pressure signal;
- a logic processing system, responsive to at least two of the plurality of pressure signals, for providing a velocity signal indicative of the velocity of the fluid in the pipe.
An apparatus for measuring a velocity of a fluid moving in a pipe, the fluid containing inhomogenous pressure disturbances, comprising:
- a first means for measuring the inhomogenous pressure disturbances at a first axial location along the ripe and for providing a first pressure signal;
- a second means for measuring the inhomogenous pressure disturbances at a second axial location alone the pipe and for providing a second pressure signal;
- and
- a logic processing system, responsive to the first and the second pressure signals, for providing a velocity signal indicative of the velocity of the fluid in the pipe.
A method for measuring a velocity of a fluid moving in a pipe, the fluid containing inhomogenous pressure disturbances, comprising:
- detecting the inhomogenous pressure disturbances at a first axial location along the pipe to provide a first pressure signal;
- detecting the inhomogenous pressure disturbances at a second axial location along the pipe to provide a second pressure signal;
- and
- processing the first and the second pressure signals to provide a velocity signal indicative of the velocity of the fluid in the pipe.
A method for measuring a velocity of a fluid moving in a pipe, the fluid containing inhomogenous pressure disturbances, comprising:
- attaching a plurality of a axially-spaced pressure sensors to the outside of the pipe;
- detecting the inhomogeneous pressure disturbances at each pressure sensor, each pressure sensor providing a pressure signal;
- processing at least two of the plurality of pressure signals to provide a velocity signal indicative of the velocity of the fluid in the pipe.
An apparatus for measuring a velocity of a fluid moving in a pipe, the fluid containing pressure disturbances, comprising:
- a plurality of pressure sensors attached to the outside of the pipe for non-intrusively measuring the pressure disturbances at a plurality of axial locations along the pipe, each sensor providing a pressure signal;
- a logic processing system, responsive to at least two of the plurality of pressure signals, for providing a velocity signal indicative of the velocity of the fluid in the pipe.
A method for measuring a velocity of a fluid moving in a pipe, the fluid containing pressure disturbances, comprising:
- nonintrusively detecting the pressure disturbances at a first axial location along the pipe to provide a first pressure signal;
- nonintrusively detecting the pressure disturbances at a second axial location along the pipe to provide a second pressure signal;
- and
- processing the first and the second pressure signals to provide a velocity signal indicative of the velocity of the fluid in the pipe.
A method for measuring a velocity of a fluid moving in a pipe, the fluid containing pressure disturbances, comprising:
- attaching a plurality of axially-spaced pressure sensors to the outside of the pipe;
- nonintrusively detecting the pressure disturbances at each pressure sensor, each pressure sensor providing a pressure signal;
- processing at least two f the plurality of pressure signals to provide a velocity signal indicative of the velocity of the fluid in the pipe.
Dependencies are inferred from the claim text.