A mud flow measurement system includes a flow pipe, a Coriolis meter, a differential pressure sensor, and a mud flow measurement module. The mud flow measurement module is configured to select a calibration curve corresponding to a drilling mud injected into the well, determine a measured density based on the signal from each of the vibration sensors and the selected calibration curve, determine a differential pressure across the Coriolis meter from the differential pressure sensor, and compute a calculated mass flow rate, Q.sub.mass, of the multiphase mud flow using equation

[00001]$Q_{\mathrm{mass}}=\frac{C_d{A}_t}{\sqrt{1-{\beta }^4}}\sqrt{2\rho *\Delta P},$

where C.sub.d is a calibration constant, A.sub.t is a cross-sectional area of the measurement tube, β is a ratio of the internal diameters of the flow pipe the measuring tube, ρ is the density of the multiphase mud, and ΔP is the differential pressure across the Coriolis meter, where ρ is the measured density determined from the Coriolis meter.

A method for analyzing particles in an air stream includes concentrating the particles in an interior region of the air stream and deflecting the concentrated particles in the air stream with a generated thermal gradient. Smaller particles in the air stream may be selectively deflected away from the interior region and towards a periphery of the air stream at a different rate than larger particles in the air stream. The generated thermal gradient may be controlled to deflect particles in a selected particle size range onto a surface of a particle detector. An effective mass of the collected particles and an aerosol mass concentration estimate of the particles within the selected particle size range may be generated. Systems for analyzing particles are also disclosed.

A flow meter includes a cylindrical body having an exterior surface and an interior surface defining an inner diameter of the cylindrical body. The cylindrical body also includes an outlet end and an inlet end. The inlet end is shaped and dimensioned for selective attachment to an inlet pipe or hose having an inner diameter that is small than the inner diameter of the cylindrical body. The flow meter also includes a gauge tap formed within the cylindrical body, the gauge tap being positioned adjacent the outlet end of the cylindrical body at a position between the outlet end and the inlet end. A pressure gauge is secured within the gauge tap for measuring the pressure within the cylindrical body and ultimately the flow of fluid through the cylindrical body. A nozzle is attached at the outlet end of the cylindrical body and at least one nozzle insert is provided for selective attachment to the nozzle so as reduce the size of the outlet in order to extend the normal range of the flow meter.

According to the present invention, it is possible to provide a flow rate measurement device capable of accurately measuring a flow rate of a measurement target gas by improving anti-contamination property. A flow rate measurement device (20) of the present invention includes a board (304) disposed along a flow direction of a measurement target gas (2) in a sub passage (134), a support body (401) that is disposed to face one surface (304a) of the board, and a flow rate sensor (411) that is supported by the support body, faces the one surface of the board, and measures a flow rate of the measurement target gas passing between the support body and the board. The sub passage includes a first passage portion D1 between the support body and one surface of the board, a second passage portion D2 between the other surface of the board and a passage wall surface of the sub passage opposed thereto, and a third passage portion D3 between the support body and the passage wall surface of the sub passage that faces the support body. The support body has a first side surface (407) that faces in the flow direction of the measurement target gas in the sub passage.

According to the present invention, it is possible to provide a flow rate measurement device capable of accurately measuring a flow rate of a measurement target gas by improving anti-contamination property. A flow rate measurement device (20) of the present invention includes a board (304) disposed along a flow direction of a measurement target gas (2) in a sub passage (134), a support body (401) that is disposed to face one surface (304a) of the board, and a flow rate sensor (411) that is supported by the support body, faces the one surface of the board, and measures a flow rate of the measurement target gas passing between the support body and the board. The sub passage includes a first passage portion D1 between the support body and one surface of the board, a second passage portion D2 between the other surface of the board and a passage wall surface of the sub passage opposed thereto, and a third passage portion D3 between the support body and the passage wall surface of the sub passage that faces the support body. The support body has a first side surface (407) that faces in the flow direction of the measurement target gas in the sub passage.

A method produces a void fraction (VF) error curve which correlates an apparent VF with the actual VF of a multi-phase flow, the method comprising (a) using a device to measure a property of the multi-phase flow from which an apparent VF may be calculated; (b) calculating the apparent VF using the measured property from the device; (c) determining the actual VF of the multiphase flow using a radiometric densitometer; (d) using the values from steps (b) and (c) to calculate the VF error; (e) repeating steps (b) through (d) for all expected flow conditions to generate a VF error curve.

A method produces a void fraction (VF) error curve which correlates an apparent VF with the actual VF of a multi-phase flow, the method comprising (a) using a device to measure a property of the multi-phase flow from which an apparent VF may be calculated; (b) calculating the apparent VF using the measured property from the device; (c) determining the actual VF of the multiphase flow using a radiometric densitometer; (d) using the values from steps (b) and (c) to calculate the VF error; (e) repeating steps (b) through (d) for all expected flow conditions to generate a VF error curve.

An orifice plate carrier for an orifice plate fitting is disclosed in which the downstream surface of the carrier has a radial lip partially occluded the orifice plate opening. The lip is configured to define the axial position of the orifice plate in the carrier and to also establish a seal between the lip and the orifice plate seal member. An orifice plate carrier also may comprise an orifice plate insert configured to allow a single carrier to accept multiple orifice plate members. An insert may be configured to accept a first type of orifice seal member, but not a second type.

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.

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.