Abstract: A self-excited wet gas flow measuring device, including a housing (1), the housing (1) is provided with a wet gas inlet (21), a dry gas outlet (23) and a liquid outlet (25); the middle of the housing (1) is mounted with a mist catching filter screen to divide a hollow cavity inside the housing (1) into a dry gas region (33) and a wet gas region (34); the wet gas inlet (21) and the liquid outlet (25) are both disposed in the wet gas region (34), and the dry gas outlet (23) is disposed in the dry gas region (33); a gas flowmeter (41) for metering the transmitted dry gas is provided at the dry gas outlet (23), a control device (51) is provided within the wet gas region (34), and a detection counting device (52) is provided at the liquid outlet (25).

Abstract: A device for measuring a total cross-sectional phase fraction of a multiphase flow includes a scintillation crystal and a detector. The scintillation crystal is coupled to the detector; and the scintillation crystal includes lutetium-176.

Abstract: Disclosed are a method and a device for measuring a flux of a heavy oil-miscible phase fluid, the method including: flowing of the heavy oil-miscible phase fluid out of an oil and gas well through the pipeline, with the heavy oil-miscible phase fluid including at least two fluid media; measuring a total flux of throttling differential pressure of the heavy oil-miscible phase fluid flowing through the streamlined spindle; carrying out a measurement with a light quantum of at least four levels on the heavy oil-miscible phase fluid by the phase separator with light quantum of multi levels, such that a linear mass of each of the at least two fluid media is obtained; and obtaining a flux of each of the at least two fluid media from the total flux of throttling differential pressure and the linear mass of each of the at least two fluid media.

Abstract: Disclosed are a method and a device for measuring a sand content in a miscible phase fluid, the method comprising: flowing of the miscible phase fluid out of an oil and gas well through a pipeline, the miscible phase fluid of the wellhead of the oil and gas well including at least two fluid media; carrying out a measurement with a light quantum of four levels on the miscible phase fluid by a phase separator installed on the pipeline, such that a linear mass of each fluid medium is obtained; calculating a sand content in mass fraction based on the linear mass of all the fluid media, when the fluid media in the miscible phase fluid includes a solid phase sand.

Abstract: This application discloses a wet gas flow rate metering method and device thereof. The Coriolis mass flowmeter measures a total mass flow rate Qm, a mixed density ?mix, and a medium temperature T; a combination of sensors measures a differential pressure ?P between an inlet and an outlet; a flow rate calculation module performs multi-physical field coupling calculation to obtain an average gas density ?g; according to the mixed density ?mix, the average gas density ?g, and a liquid density ?l, a mass liquid content nm of a mixed medium is calculated, and the total mass flow rate Qm is corrected by the mass liquid content ?m, the medium temperature T and the average pressure P to obtain a corrected total mass flow rate Qm?. According to the total mass flow rate Qm? and the mass liquid content ?m, a two-phase flow rate is calculated.

Abstract: A wet gas flow meter includes an input pipe section; a vibration measurement pipe; an output pipe section; a differential pressure sensor; a pressure sensor; a transducer; and a temperature sensor. The input pipe section, the vibration measurement pipe, and the output pipe section are connected sequentially one by one. The input pipe section includes a first pressure tap, and the output pipe section include a second pressure tap; the differential pressure sensor communicates with the input pipe section and the output pipe section via the first pressure tap and the second pressure tap, respectively. The pressure sensor communicates with the input pipe section and/or the output pipe section via the first pressure tap and/or the second pressure tap, respectively. The transducer is disposed on the vibration measurement pipe. The temperature sensor is disposed on the vibration measurement pipe and/or the input pipe section and/or the output pipe section.

Abstract: A device for measuring flow rate of wet gas based on an exempt radioactive source, includes a section of cylindrical pipe and a conical throttle located inside the cylindrical pipe and coaxially arranged therewith. The conical throttle includes a head cone section and a tail cone section arranged to have a common bottom surface. The head cone section faces a wet gas inlet of the cylindrical pipe. An annular gap is defined between the inner wall of the cylindrical pipe and the maximum diameter of the conical throttle for passage of wet gas. An exempt radioactive source block is arranged at the maximum diameter of the conical throttle in such a way that the gamma rays emitted from the radioactive source block can transmit radially through the annular gap to reach the gamma ray detector located outside the cylindrical pipe.

Abstract: A self-excited wet gas flow measuring device, including a housing (1), the housing (1) is provided with a wet gas inlet (21), a dry gas outlet (23) and a liquid outlet (25); the middle of the housing (1) is mounted with a mist catching filter screen to divide a hollow cavity inside the housing (1) into a dry gas region (33) and a wet gas region (34); the wet gas inlet (21) and the liquid outlet (25) are both disposed in the wet gas region (34), and the dry gas outlet (23) is disposed in the dry gas region (33); a gas flowmeter (41) for metering the transmitted dry gas is provided at the dry gas outlet (23), a control device (51) is provided within the wet gas region (34), and a detection counting device (52) is provided at the liquid outlet (25).

Abstract: 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.

Abstract: A device for measuring a total cross-sectional phase fraction of a multiphase flow includes a scintillation crystal and a detector. The scintillation crystal is coupled to the detector; and the scintillation crystal includes lutetium-176.

Abstract: 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.

Abstract: The invention is directed to apparatus for measuring mass flow-rates of the gas, oil and water phases in a wet gas, comprising the following parts: a differential pressure flow meter, having a throat section, and a gamma ray detector, comprising a gamma ray emitter and a gamma ray receiver that are arranged in such a manner that gamma rays emitted from the gamma ray emitter can pass through the throat section in diametrical direction to reach the gamma ray receiver; wherein a radioactive source in the gamma-ray emitter is a multi-energy radioactive source that can naturally emit at least three energy gamma rays, and a thermostatic device is not used in the gamma ray receiver. The invention further relates to a metering method for measuring mass flow-rates of the gas, oil and water phases in a wet gas, in which the above apparatus is used.

Abstract: A device for measuring flow rate of wet gas based on an exempt radioactive source, includes a section of cylindrical pipe and a conical throttle located inside the cylindrical pipe and coaxially arranged therewith. The conical throttle includes a head cone section and a tail cone section arranged to have a common bottom surface. The head cone section faces a wet gas inlet of the cylindrical pipe. An annular gap is defined between the inner wall of the cylindrical pipe and the maximum diameter of the conical throttle for passage of wet gas. An exempt radioactive source block is arranged at the maximum diameter of the conical throttle in such a way that the gamma rays emitted from the radioactive source block can transmit radially through the annular gap to reach the gamma ray detector located outside the cylindrical pipe.

Abstract: A method for measuring respective flowrates of gas phase and liquid phase in a multiphase fluid using a critical flow nozzle flowmeter. The critical flow nozzle flowmeter includes a throttling nozzle having an inlet, an outlet and a throat, and the throat has a smallest flow area for flowing fluid; a gamma ray detector, including a gamma ray emitter and a gamma ray receiver, arranged in a way allowing the gamma ray emitted by the gamma ray emitter to pass through a cross-section at the inlet of the throttling nozzle in a diametrical direction to reach the gamma ray receiver; pressure sensors respectively configured for measuring the pressure P1 at the inlet of the throttling zone and the pressure P2 at the outlet of the throttling nozzle; and a temperature sensor configured for measuring the temperature T1 at the inlet of the throttling nozzle.

Abstract: A method for measuring respective flowrates of gas phase and liquid phase in a multiphase fluid using a critical flow nozzle flowmeter. The critical flow nozzle flowmeter includes a throttling nozzle having an inlet, an outlet and a throat, and the throat has a smallest flow area for flowing fluid; a gamma ray detector, including a gamma ray emitter and a gamma ray receiver, arranged in a way allowing the gamma ray emitted by the gamma ray emitter to pass through a cross-section at the inlet of the throttling nozzle in a diametrical direction to reach the gamma ray receiver; pressure sensors respectively configured for measuring the pressure P1 at the inlet of the throttling zone and the pressure P2 at the outlet of the throttling nozzle; and a temperature sensor configured for measuring the temperature T1 at the inlet of the throttling nozzle.

Abstract: The invention is directed to apparatus for measuring mass flow-rates of the gas, oil and water phases in a wet gas, comprising the following parts: a differential pressure flow meter, having a throat section, and a gamma ray detector, comprising a gamma ray emitter and a gamma ray receiver that are arranged in such a manner that gamma rays emitted from the gamma ray emitter can pass through the throat section in diametrical direction to reach the gamma ray receiver; wherein a radioactive source in the gamma-ray emitter is a multi-energy radioactive source that can naturally emit at least three energy gamma rays, and a thermostatic device is not used in the gamma ray receiver. The invention further relates to a metering method for measuring mass flow-rates of the gas, oil and water phases in a wet gas, in which the above apparatus is used.

Abstract: The invention relates to a device for online measurement of gas flowrate and liquid flowrate of a wet gas in a horizontal pipe, comprising the following parts: a horizontal Venturi tube, comprising a truncated cone-shaped inlet pipesection with section area reduced gradually, a cylindrical throat pipesection and a truncated cone-shaped outlet pipesection with section area increased gradually; and a gamma ray monitor, comprising a gamma ray emitter and a gamma ray detector arranged in a manner that gamma rays emitted by the gamma ray emitter can radially pass through the cross section of the throat pipesection to reach the gamma ray detector. The invention also relates to a method for online measurement of gas flowrate and liquid flowrate of a wet gas in a horizontal pipe by using above device.

Abstract: A wet gas flow measuring method, wherein measuring total flow differential pressure value ?P of wet gas in a pipeline by a differential pressure flow measuring device (201), measuring section gas contents of the wet gas in the pipeline by at least two phase fraction meters respectively (202), obtaining optimized section gas content value GVFopt by a flow calculating module based on the section gas contents respectively measured by the at least two phase fraction meters (203); and calculating gas volume flow rate Qg and liquid volume flow rate Ql by the flow calculating module based on the total flow differential pressure value ?P of the wet gas and the optimized section gas content value GVFopt (204).

Abstract: A flow metering method for an annular gas and liquid flow comprises the following steps of: first, enabling a gas and liquid mixed fluid to flow through a vertically arranged circular pipe so as to form the annular gas and liquid flow; and then measuring total flow or liquid average velocity or gas average velocity of the gas and liquid mixed fluid; measuring physical quantities, such as temperature, pressure, gas fraction and the like, of the gas and liquid mixed fluid; and finally, accurately figuring out liquid volume flow and gas volume flow according to analysis of a gas and liquid slip factor.

Abstract: An extremely high water cut oil-gas-water three phase flow water removing device includes a mist eliminator (8), a fluid stabilizer (7), a liquid collection chamber (2), a fluid directing duct (5), an inlet connection pipe section (10), a gas outlet connection pipe section (9), a mixture liquid exit connection pipe section (4), a free water outlet connection pipe section (1). The function of the device is to effectively remove most of the free water from the high water cut oil-air-water three phase flow mixture liquid. An extremely high water cut oil-air-water three phase flow measurement apparatus and a measurement method using the water removing device are also disclosed.