A vortex flowmeter for measuring a flow rate of a fluid. The meter includes a flowtube, a bluff body, and a vortex sensor. The bluff body, which is positioned in the flowtube, sheds vortices in the fluid when the fluid flows through the flowtube and the vortex sensor detects the vortices and generates a vortex signal representing the detected vortices. A pressure sensor arrangement is configured to detect a differential pressure in the fluid between a first location upstream of at least a portion of the bluff body and a second location downstream of at least a portion of the bluff body and generate a differential pressure signal representing the pressure differential between the two locations. The flowmeter determines the fluid flow rate based on the pressure differential.

A vortex flowmeter for measuring a flow rate of a fluid. The meter includes a flowtube, a bluff body, and a vortex sensor. The bluff body, which is positioned in the flowtube, sheds vortices in the fluid when the fluid flows through the flowtube and the vortex sensor detects the vortices and generates a vortex signal representing the detected vortices. A pressure sensor arrangement is configured to detect a differential pressure in the fluid between a first location upstream of at least a portion of the bluff body and a second location downstream of at least a portion of the bluff body and generate a differential pressure signal representing the pressure differential between the two locations. The flowmeter determines the fluid flow rate based on the pressure differential.

Disclosed is a method for determining a flowed amount of a medium using a first flow measuring transducer according to a first measuring principle and a second flow measuring transducer according to a second measuring principle. The measured values of the first transducer are more reliable in first states of the medium than measured values of the second transducer, and the second measured values are more reliable in second states than the first measured values. A contribution to the flowed amount is ascertained based on the more reliable measured values. The contribution to the flowed amount based on the second measured values is ascertained by means of a transfer function. An updated version of the transfer function is ascertained when the first measured values are more reliable, and the flowed amount earlier ascertained based on the second measured values is corrected as a function of the updated transfer function.

A fluid metering system includes a first and a second fluidic pipe section disposed in parallel between a fluidic pipe inlet and outlet. The first fluidic pipe section includes a first flow control device and a first flow metering device each connected in fluidic series. The second fluidic pipe section includes a second flow metering device connected in fluidic series. The fluidic pipe inlet and the fluidic pipe outlet have the same cross-sectional area and/or flow rate capacity. The first fluidic pipe section has an equal or smaller cross-sectional area and/or flow rate capacity in comparison to the fluidic pipe inlet and outlet. The second fluidic pipe section has a smaller cross-sectional area and/or flow rate capacity in comparison to the cross-sectional area and/or flow rate capacity of the first fluidic pipe section. Alternatively, the second fluidic pipe section may include a second flow control device connected in fluidic series.

A device for total cross-section measurement of a mass flow rate of gas, liquid and solid in a multiphase flow includes a gamma-ray source, a gamma-ray detector, and a differential pressure type flowmeter. The differential pressure type flowmeter includes a throat section, and the gamma-ray source and the gamma-ray detector are respectively disposed at opposite positions on both sides of the throat section. The gamma-ray detector is an array including a plurality of detection units, and the gamma-ray source is configured to emit gamma rays covering the measurement cross-section of the throat section. The gamma-ray detector is configured to receive the gamma rays passing through the measurement cross-section of the throat section.

A device for measuring a mass flow rate of a multiphase flow based on ray coincidence measurement includes a support frame and a plurality of ray detection assemblies. The support frame includes a central through hole and an outer wall, and the central through hole is configured to receive a fluid pipe. The plurality of ray detection assemblies is distributed along the circumferential direction of the outer wall and is perpendicular to the axis of the central through hole. The plurality of ray detection assemblies each includes a scintillation crystal and a detector, and the scintillation crystal is disposed between the outer wall and the detector.

A system for removing dead volume in a sensor assembly of a mass flow controller is presented. The system comprises a valve assembly communicable coupled to the sensor assembly. The valve assembly is in fluid communication with fluid in a primary flow path and the sensor assembly is in fluid communication with fluid in the primary flow path. The sensor assembly comprises a pressure transducer having a first reservoir and another pressure transducer having a second reservoir. The first reservoir has a port in fluid communication with fluid in a sampled flow path. The second reservoir is coupled to a second pressure transducer and is fluidly coupled to the first reservoir through a flow through path. The second reservoir also includes another port for communicating the flow of fluid from the flow through path to another flow path. A flow rate restrictor is disposed in the flow through path.

A method includes obtaining pressure measurements associated with fluid that passes through a flow restrictor, where the pressure measurements identify pressures upstream and downstream from the flow restrictor. The method also includes generating estimated flow measurements based on the pressure measurements. The method further includes comparing the estimated flow measurements and actual flow measurements generated by a flow meter that is fluidly coupled to the flow restrictor. In addition, the method includes determining whether a problem exists based on the comparison. The flow restrictor could provide a fixed restriction or a variable restriction for the fluid. An overall loss coefficient associated with the flow restrictor could be used to generate an estimated flow measurement.

A chemical injection system for a resource extraction system includes a controller having a memory and a processor. The memory stores instructions that cause the processor to receive a first pressure from a first pressure sensor of the resource extraction system, receive a second pressure from a second pressure sensor of the resource extraction system, determine a flowrate of a produced fluid of the resource extraction system based on the first pressure and the second pressure, determine an ion concentration of the produced fluid, and adjust an injection rate of a chemical into the resource extraction system based on the flowrate of the produced fluid, the ion concentration of the produced fluid, or both.

The present invention accurately measures flow rates that have a high peak flow rate caused by pulsation, and is provided with a first flow rate converter having a first measurement range and a first response speed, a second flow rate converter having a second measurement range that is narrower on a low flow rate side than the first measurement range and has a second response speed that is slower than the first response speed, and a flow rate calculation unit that, when a flow rate contained in the second measurement range is measured, calculates the flow rate by correcting outputs from the first flow rate converter using outputs from the second flow rate converter.