A method and apparatus for determining at least one characteristic of a fluid flowing within a pipe is provided. The fluid flow may include one or more liquid component bodies and one or more gas component bodies, which bodies occupy a substantial cross-sectional area of the pipe when passing a location in the pipe. The method includes, and the apparatus includes elements operable to perform, the steps of: 1) transmitting a signal into the fluid flow at the location within the pipe, and receiving the signal after it has traversed at least a portion of the fluid flow; 2) determining a time of flight of the signal traversing the fluid flow; 3) determining the presence of a liquid component body at the location in the pipe, using the determined time of flight; and 4) determining at least one characteristic of the fluid using fluid data generated if the liquid component body is present at the location.

A system and method for providing a compositional measurement of a mixture having entrained gas

Methods and apparatus determine phase fractions for phases within a fluid mixture flow under a wide range of flow conditions including wet-gas flow. Appropriate flow algorithms can utilize this phase fraction information with a total flow rate of the mixture to find individual flow rates for phases, such as oil, water, and gas or gas and liquid, which can represent a combination of oil and water phases. For some embodiments, a multiphase flowmeter includes an array of spatially distributed pressure sensors configured to determine a velocity of the mixture flow and hence the total flow rate, which is applied with information from a differential pressure meter to calculate the bulk density of the fluid mixture. Further, additional speed of sound information or a water-in-liquid ratio as may be determined by spectral analysis can enable differentiation between the oil and water phases.

Wet-gas flowmeter

The present disclosure provides a flow meter including a vibrating element configured to be inserted in a measured fluid; a driver circuit to vibrate the vibrating element in its natural frequency of oscillation; one or more additional technology flow meters configured to measure an additional property of the fluid; a data acquisition circuit configured to measure signals effected by the flow of a multi-phase fluid; and a computer suitable to solve non-linear simultaneous equations. The fluid may include gas, oil and/or water. The fluid may also include solids.

Multi-phase fluid measurement apparatus and method

There is provided a differential pressure (dP) measurement device for use in flow measurement comprising a first microwave resonator (1) having a flexible or yieldable part or member (4) deformable or yieldable when subject to a differential pressure in such a way as to alter a resonant frequency of said resonator, and an electronic unit (12, 14) which is coupled to said resonator (1), and where said electronic unit is adapted to produce an output depending on a resonant frequency of said resonator (1).

Differential pressure measurement device

A process pressure fluid transmitter (10) is coupled to a differential pressure producer (12) and measures a differential pressure across the producer (12). A statistical parameter is calculated (106) upon successive differential pressure indications, and the calculated parameter is used to indicate wet gas flow. The indication can be generated locally at the process pressure transmitter (10), communicated via a wired process communication loop, communicated wirelessly, or any combination thereof.

Wet gas indication using a process fluid differential pressure transmitter

The present invention is directed to a flow meter that obtains the individual flow rates of gas, liquid hydrocarbons, and water in a predominantly gas-containing flowing fluid mixture The flow meter comprises a water content meter ( 7 ) that provides a signal representing a measure of the water content of said fluid The flow meter also comprises a double differential pressure generating ( 3 ) and measuring ( 4 ) structure, denoted a DDP-unit ( 2 ), that provides two measurement signals ( 6 A and 6 B) representing two independent values of differential pressure (DP) in said fluid ( 1 ) In addition to the above, the meter also comprises a signal processing unit ( 8 ) having inputs ( 9 A-C) for receiving the measurement signals and the water content signal, and a calculation module ( 10 ) which calculates values representing the volumetric flow rates of said gas, liquid hydrocarbons and water in said fluid

Flow meter for measuring fluid mixtures

A flow meter obtains the individual flow rates of gas, liquid hydrocarbons and water in a predominantly gas-containing fluid flowing mixture. The flow meter comprises a water content meter 7 providing a signal representing a measure of the water content of said fluid 1. It also comprises a double differential pressure generating 3 and measuring 4 structure that provides two measurement signals 6A-B representing two independent values of differential pressure (DP) in said fluid 1. In addition to the above, the meter also comprises a signal processing unit 8 having inputs 9A-C for receiving the measurement signals 6A-B and the water content signal 13, and a calculation module 10 which calculates values representing the volumetric flow rates of said gas, liquid hydrocarbons and water in said fluid 1.

Three-phase flow meter

Method for monitoring a body inserted in pipe conducting a fluid flow, the body being positioned in a distance from the pipe wall providing a gap between the body and the pipe wall, the gap constituting an electromagnetic, e.g. microwave, resonator, at least one coupling probe being positioned close to said gap, the method comprising the steps of applying an electromagnetic signal. monitoring the frequency response of the resonator through the probe, and analysing the frequency response to provide a measure of movements, e.g. vibrations induced by a turbulent flow, of the body. The invention also relates to an insert with support structure especially shaped to avoid influence on the resonance measurement.

Method for monitoring a body inserted in a conduit and insert for electromagnetic resonance measurements

Stromningsmaler og fremgangsmate for maling av individuelle mengder av gass, hydrokarbonvaeske og vann i en fluidblanding

Insert for electromagnetic resonance measurements, having a substantially unsupported essentially conically or biconically shaped portion and a support structure including at least one fin extending from the insert to a conduit wall or meter body. The at least one fin extends partly into the essentially conically or biconically shaped portion, but only to an extent that does not influence substantially on the electromagnetic resonance measurement. A system including such insert is also described.

Rune Sørhus

Papers

Flow meter for measuring fluid mixtures

Three-phase flow meter

Method for monitoring a body inserted in a conduit and insert for electromagnetic resonance measurements

Stromningsmaler og fremgangsmate for maling av individuelle mengder av gass, hydrokarbonvaeske og vann i en fluidblanding

Insert for electromagnetic resonance measurements