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Flow Meter

A flow meter comprises an inflow chamber having a first fluid inlet, an outflow chamber housed in the inflow chamber and having a second fluid inlet, which is in fluid communication with the inflow chamber, and a fluid outlet by which fluid can drain from the outflow chamber, and a sensing device having a elongate sensor which is positioned at, or adjacent to and downstream of, the second fluid inlet. The second fluid inlet is of limited dimensions so that, in use, a head of fluid is formed in the inflow chamber and the flow rate of the fluid passing through the second fluid inlet is monitored based on the extent of the elongate sensor which is covered by the fluid.

Abstrict

Downhole flow meter

This invention comprises the use of a variable orifice valve as a flow controller and flow meter. Pressure measurements are taken upstream and downstream of the variable orifice valve by way of a differential pressure measurement mechanism. The differential pressure measurement mechanism may comprise two separate absolute pressure measurement devices or a single differential pressure measurement device. Flow rate through the valve is determined from the pressure drop across the valve. In wellbores having multiple zones, a variable orifice valve together with a differential pressure measurement mechanism may be deployed for each zone. The flow rate through each of the zones and at the surface can then be monitored and controlled.

Increased sensitivity for turbine flow meter

A lower cost turbine flow meter comprised of an inner housing constructed out of a high permeable material surrounded by an outer housing constructed out of a lower cost, lower permeable material. A port is placed in the outer housing that runs down to the surface of the inner housing to detect the rotation of turbine rotors that rotate inside the meter as fluid or gas flows through the meter. A pickoff coil is placed in the port to generate a magnetic signal to penetrate through the inner housing wherein the turbine rotor vanes superimpose a pulse signal on the magnetic signal. The lower cost turbine flow meter can be used for any application for measuring fluid or gas, and may be used in a service station environment for measuring fuel or vapor in vapor recovery applications.

Mass flow meter with chip-type sensors

A mass flow meter employs discrete chip-type temperature sensors to sense a fluid flow rate. The sensor can be a semiconductor chip such as SiC or silicon, or thin film tungsten on an AlN substrate. The sensors can be distributed symmetrically with respect to the conduit through which the fluid flows, and can be connected in a four-sensor bridge circuit for accurate flow rate monitoring. An output from the mass flow meter can be used to control the fluid flow.


Retrievable downhole flow meter
Capacitative electromagnetic flow meter
Ultrasonic flow meter with reduced noise
Coriolis mass flow meter having a thick-walled measuring tube
Detector for an ultrasonic flow meter
Karman vortex flow meter
Coriolis mass flow meter employing non-metallic flow conduit structure
Fluidic volumetric fluid flow meter
Electromagnetic flow meter
Fluid flow meter utilizing pressure sensing
Air flow meter
Fluid flow meter
Liquid flow meter construction
Positive displacement flow meter method and apparatus
Magnetic-inductive flow meter with a measuring tube made of plastic


PUB. APP. NO. Title
701 20040045367 Flow Meter
702 20040035577 Downhole flow meter
703 20040035220 Increased sensitivity for turbine flow meter
704 20040035201 Mass flow meter with chip-type sensors
705 20040030509 Method for measuring flow by means of an ultra sonic flow meter
706 20040020307 Flow meter
707 20040000197 Venturi augmented flow meter
708 20030226405 FLOW METER
709 20030217737 Flow meter
710 20030209083 Flow meter
711 20030192377 Positive flow meter
712 20030183018 Flow meter as an irrigation management tool
713 20030172731 Flow meter having airflow sensor
714 20030145662 METHOD AND APPARATUS USING TURBINE FLOW METER TO MEASURE FLUID FLOW THERETHROUGH WITHOUT REFERENCE TO VISCOSITY
715 20030136883 FLOW METER STRUT
716 20030126993 Beverage making system with flow meter measurement control and method
717 20030115969 Ultrasonic flow meter
718 20030105437 ASPIRATION FLOW METER AND CONTROL
719 20030101826 Collection reservoir for use with flow meter control system
720 20030101825 Aspiration tube for use with flow meter control system
721 20030089180 Coriolis mass flow meter
722 20030070494 Air flow meter
723 20030033096 Circuit arrangement for deriving the measured variable from the signals of sensors of a flow meter
724 20030028334 Evaluating a vortex flow-meter signal
725 20030010398 Flow meter type liquid filling apparatus
726 20030004666 Gas flow meter
727 20030000578 Mass flow meter systems and methods
728 20020195145 Mass flow meter systems and methods
729 20020189368 Flow meter with a self-illuminating floater
730 20020174898 Mass flow meter systems and methods
731 20020163432 Liquid flow meter
732 20020139197 Flow meter for multi-phase mixtures
733 20020129664 Non-invasive real-time flow meter and related flow measuring method
734 20020121136 Micro-thermocouple for a mass flow meter
735 20020108452 Flow meter module for a controller
736 20020104386 Ultrasonic flow meter
737 20020104385 Ultrasonic flow meter
738 20020100335 Ultrasonic flow meter with reduced noise
739 20020069699 Fluid flow meter
740 20020046613 Flow meter
741 20020046612 Fluid mass flow meter with substantial measurement range
742 20020045834 Ocular-blood-flow meter
743 20020020226 Scale indication apparatus and flow meter having the same
744 20020020225 Vortex flow meter
745 20020014224 Flow meter
746 20020014222 Thermal type air flow meter
747 20020002335 Blood flow meter apparatus and method of use
748 20010039942 THERMAL AIR FLOW METER

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