Flow meter for measuring flow velocity in oil continuous flows
AssigneeRoxar Flow Measurement AS
InventorTeerachai Leeungculsatien
Life of this patent
Estimating the term…
Abstract
Flow meter and method for measuring the flow velocity of an oil continuous multiphase flow, said flow including water droplets. The flow meter including at least one magnetic field generator configured to provide a magnetic field with a known strength into said flow, the flow meter also including at least one sensor for measuring the charge at the sensor relative to a ground level, the sensor being positioned at a distance from the center of the magnetic field axis and the flow axis, in essentially the same axial position as the magnetic field axis, wherein the meter also including a calculating means for calculating a measure of the flow velocity based on the measured charge.
Claims11
A flow meter for measuring flow velocity of water in an oil continuous multiphase flow, the flow meter comprising:
- at least one magnetic field generator configured to provide a magnetic field with a known strength into the oil continuous multiphase flow;
- at least one sensor for measuring the charge at the sensor relative to a ground level, the sensor having low impedance circuitry and being positioned at a distance from the center of a magnetic field axis and a flow axis, in essentially the same axial position as the magnetic field axis;
- wherein the flow meter is adapted to calculate a measure of the flow velocity based on the measured charge;
- and
- a water volume fraction measuring instrument, measuring water content of the oil continuous multiphase flow, the flow meter being adapted to calculate the water velocity also based on the determined water content.
A flow meter for measuring flow velocity of water in an oil continuous multiphase flow, the flow meter comprising:
- at least one magnetic field generator configured to provide a magnetic field with a known strength into the oil continuous multiphase flow;
- at least one sensor for measuring the charge at the sensor relative to a ground level, the sensor having low impedance circuitry and being positioned at a distance from the center of a magnetic field axis and a flow axis, in essentially the same axial position as the magnetic field axis;
- wherein the flow meter is adapted to calculate a measure of the flow velocity based on the measured charge;
- and
- a storage device including predetermined information including the water content of the oil continuous multiphase flow, the flow meter being adapted to calculate the water velocity also based on the predetermined water content.
A flow meter for measuring flow velocity of water in an oil continuous multiphase flow, the flow meter comprising:
- at least one magnetic field generator configured to provide a magnetic field with a known strength into the oil continuous multiphase flow;
- at least one sensor for measuring the charge at the sensor relative to a ground level, the sensor having low impedance circuitry and being positioned at a distance from the center of a magnetic field axis and a flow axis, in essentially the same axial position as the magnetic field axis;
- wherein the flow meter is adapted to calculate a measure of the flow velocity based on the measured charge;
- and
- wherein the calculation unit is calibrated based on known flow conditions, measuring the velocity of the water based on measured deviations from the known flow conditions.
A method for measuring the flow velocity of water in a hydrocarbon continuous fluid flow in a pipe of the fluid, the method comprising:
- applying a magnetic field across the hydrocarbon continuous fluid flow;
- using a sensor at a pipe wall positioned outside a magnetic field axis, measuring charge at the sensor, the sensor having low-impedance circuitry;
- calculating water flow velocity based on the measured charge at the sensor;
- and
- wherein the water flow velocity is calculated based on measured charge and water volume fraction (“WVF”) of the hydrocarbon continuous flow.
Dependencies are inferred from the claim text.