Oil and Gas Applications for Digital Coriolis Mass Flow Metering — Introduction

Correcting a Coriolis Meter for Two Phase Oil & Gas Flow

It is also common for flowmeters to be installed downstream of a two or three phase separator. If the well conditions change or the separator has been incorrectly sized, then it is possible that the oil liquid outlet may have some gas carry under. The effects of gas entrainment on the output of ultrasonic and Coriolis meters has been reported previously [1] [2]. It is already known that gas ent...

Ultrasonic Transducers for Gas and Liquid Flow Metering

Accurate fluid flow metering is essential for modern process control, and ultrasonic flow meters are well established in this area. However, the specific acoustic impedance mismatch for most piezoelectric ultrasonic transducers is different when operating liquids and gases, hence there are problems measuring two-phase flows when using a single type of piezoelectric transducer in a flow meter. T...

Micro Coriolis Mass Flow Sensor for Chemical Micropropulsion Systems

We have designed a micromachined micro Coriolis flow sensor for the measurement of hydrazine (N2H4, High Purity Grade) propellant flow in micro chemical propulsion systems [1]. The sensor measures mass flow up to 6 mg/s for a single thruster or up to 24 mg/s for four thrusters. The sensor will first be used for measurement and characterization of the micro thruster system in a simulated space v...

Digital Transformation Initiative Oil and Gas Industry

Evaluation procedures of ultrasonic signals in gas flow metering

In technical processes very often signals are generated which are complex modulated and superposed by stochastic disturbances or noise. A typical example is an ultrasonic wave passing a streaming fluid perpendicularly which is complex modulated by stochastically distributed turbulences. The signal can be demodulated digitally by undersampling to separate the narrow sidebands. The complex modula...