Class 73/61.47 - By pressure measurement

Subclass of Class 73 - Measuring and testing
Definition: Subject matter wherein the determination is made by measuring
No. of patents: 33
Last issue date: 06/21/2011

Number	Title	Issue Date
7963156	Method to determine a fuel composition A method to determine the fuel composition of a fuel mixture from a first fuel and a second fuel for the operation of an internal combustion engine. The first and the second fuel have different combustion rates and/or different specific energy contents and the inter...	06/21/2011
7353696	Apparatus for measuring methanol concentration An apparatus for measuring a methanol concentration is provided. The apparatus is located in a pipe which supplies liquid fuel to the anode of a direct liquid feed fuel cell, and may include a vertical supporting beam located in the pipe; a horizontal plate located ...	04/08/2008
7328624	Probe for measuring parameters of a flowing fluid and/or multiphase mixture A probe 10,170 is provided that measures the speed of sound and/or vortical disturbances propagating in a single phase fluid flow and/or multiphase mixture to determine parameters, such as mixture quality, particle size, vapor/mass ratio, liquid/vapor ratio, ...	02/12/2008
7322245	Apparatus and method for measuring a fluid flowing in a pipe using acoustic pressures In industrial sensing applications at least one parameter of at least one fluid in a pipe 12 is measured using a spatial array of acoustic pressure sensors 14,16,18 placed at predetermined axial locations x1, x2, x3 along the pipe ...	01/29/2008
7257988	Densitometer with pulsing pressure Techniques for measuring a density of a liquid within a fluid that includes both a liquid and a gas are described. A pressure of the fluid oscillates according to a time-varying function, which causes a density of the fluid also to oscillate according to the same ti...	08/21/2007
7253742	Method and apparatus for measuring parameters of a fluid flowing within a pipe using a configurable array of sensors An apparatus for measuring at least one parameter associated with a fluid flowing within a pipe includes a spatial array of pressure sensors disposed at different axial locations x1. . . xN along the pipe. Each of the pressure sensors provides ...	08/07/2007
7186356	Analytical device A sensor for chemical species or biological species or radiation presenting to test fluid a polymer composition comprises polymer and conductive filler metal, alloy or reduced metal oxide and having a first level of electrical conductance when quiescent and being co...	03/06/2007
7117717	Densitometer with pulsing pressure Techniques for measuring a density of a liquid within a fluid that includes both a liquid and a gas are described. A pressure of the fluid oscillates according to a time-varying function, which causes a density of the fluid also to oscillate according to the same ti...	10/10/2006
7028538	Sand monitoring within wells using acoustic arrays A method for detecting the presence of particles, such as sand, flowing within a fluid in a conduit is disclosed. At least two optical sensors measure pressure variations propagating through the fluid. These pressure variations are caused by acoustic noise generated...	04/18/2006
6988411	Fluid parameter measurement for industrial sensing applications using acoustic pressures In industrial sensing applications at least one parameter of at least one fluid in a pipe 12 is measured using a spatial array of acoustic pressure sensors 14,16,18 placed at predetermined axial locations x1, x2, x3 along the pipe ...	01/24/2006
6931188	Side-hole cane waveguide sensor A side-hole optical cane for measuring pressure and/or temperature is disclosed. The side-hole cane has a light guiding core containing a sensor and a cladding containing symmetrical side-holes extending substantially parallel to the core. The side-holes cause an as...	08/16/2005
6928862	Method of monitoring dual-phase liquid and interface levels A dual-phase level monitoring (DPLM) instrument that provides continuous signals that enables determination of the location of the top surface of the lighter of two immiscible fluids (the product) and the hydrostatic pressure below the total fluid column of both imm...	08/16/2005
6901789	Method for determining parameters A method for determining parameters for the viscosity or temperature of a brake fluid of a vehicle by way of a predetermined pressure build-up within time limits in at least one defined section of a brake circuit and for detecting a pressure in the said section and/...	06/07/2005
6862920	Fluid parameter measurement in pipes using acoustic pressures At least one parameter of at least one fluid in a pipe is measured using a spatial array of acoustic pressure sensors placed at predetermined axial locations along the pipe 12. The pressure sensors provide acoustic pressure signals, which are provided to a si...	03/08/2005
6837098	Sand monitoring within wells using acoustic arrays A method for detecting the presence of particles, such as sand, flowing within a fluid in a conduit is disclosed. At least two optical sensors measure pressure variations propagating through the fluid. These pressure variations are caused by acoustic noise generated...	01/04/2005
6776029	Oil content measuring device and refrigeration system using the same An oil content measuring device measures the oil content of a refrigerant in a supercritical or a vapor phase state. A refrigeration system uses the oil content measuring device. The oil content measuring device has an electrostatic capacity measuring device for mea...	08/17/2004
6536262	Determination of the alcohol concentration in the electrolyte of fuel cells In a method for determining the alcohol concentration in the alcohol/water mixture of fuel cells that are operated with this mixture, in particular for direct methanol fuel cells, the alcohol/water mixture is pumped through a constriction. The differentia...	03/25/2003
6490916	Method and system of fluid analysis and control in a hydrocarbon well A system and method of fluid analysis in a hydrocarbon borehole is disclosed. Acoustic energy is emitted into the production fluid downhole at a level which causes a phase transition in the fluid. The pressure associated with the phase transition is deter...	12/10/2002
6354147	Fluid parameter measurement in pipes using acoustic pressures At least one parameter of at least one fluid in a pipe 12 is measured using a spatial array of acoustic pressure sensors 14,16,18 placed at predetermined axial locations x1,x2,x3 along the pipe 12. The pressure sensors 14,16,18 provide acoustic pressure s...	03/12/2002
6298724	Clathrate hydrate dissociation point detection and measurement Apparatus and method for detecting the formation and dissociation of gas hydrates in a fluid. The apparatus used comprises a piezoelectric crystal sensor and a signal analyzer. The crystal sensor has a deposition surface in contact with the fluid. Under a...	10/09/2001
6286367	Method of evaluating the effluent of a hydrocarbon well by means of a multiphase flowmeter, and installation implementing the same A multiphase flowmeter (30) is mounted on the piping via which a multiphase fluid flows out from a hydrocarbon well, so as to measure the flow rates of the various phases of the fluid. A back-pressure valve (34) is placed in the piping downstream from the...	09/11/2001
6234004	Method for measurement of flow velocity or diffusivity, microsensor and application of such microsensor The invention relates to a method and a microsensor for measurement of transport coefficients like diffusivity or flow velocity. The microsensor has a reservoir provided with a mouth and a transducer. The transducer has a tip placed in the mouth, which ca...	05/22/2001
6223588	Dew point and bubble point measurement Apparatus and method for detecting the dew point or bubble point phase transition in fluid. The apparatus used comprises a piezoelectric crystal sensor and a signal analyser. The phase transition of the fluid is measured by monitoring, directly or indirec...	05/01/2001
6128949	Phase change analysis in logging method An improved method of fluid analysis in the borehole of a well. A fluid sampling tool is fitted with a pumpout module that can be used to draw fluids from the formation, circulate them through the instrument, and then expel this fluid to the borehole. It ...	10/10/2000
5886249	Micromachined integrated opto-flow gas/liquid sensor A micromachined integrated opto-fluidic or opto-acoustic sensor having a rapidly intensity-varying or pulsing light source, an interference filter, a gas cavity, which may or may not be an optical and/or acoustic resonator tuned to a particular wavelength...	03/23/1999
5756884	Device for determining characteristics of petroleum fluid samples for example on a production site A rigid body comprising two cylindrical chambers (14, 15) with a pointed bottom for example, connected to each other by a fine line controlled by a valve V5, is fixed in a thermostat-controlled enclosure (7). Two rods (18, 17) forming pistons, provided wi...	05/26/1998
5635631	Determining fluid properties from pressure, volume and temperature measurements made by electric wireline formation testing tools A method of determining an amount of dissolved gas in a fluid sample is disclosed. The method includes hydraulically confining and expanding the sample while measuring pressure and volume. A first volume and pressure are determined at which the rate of ch...	06/03/1997
5433105	Method and device for analyzing moisture content in oil A method for analyzing the moisture content of an oil includes the steps of providing an enclosed chamber sealed in a gas-tight fashion, placing the oil to be analyzed within the enclosed chamber, heating the enclosed chamber for causing the moisture in t...	07/18/1995
5185084	Method and apparatus for control of flow through a filter chamber by measured chamber equilibration pressure A method and apparatus for the controlled instrumentation processing of cells and other paricles with a filter device measures a parameter of the flow through the filter device of a fluid carrying the particles. A measure of the change of fluid flow throu...	02/09/1993
4856344	Measuring flow in a pipe A gradiomanometer 1 measures the difference in pressure between points 3 and 4 to indicate density and hence proportions of two phases (e.g. liquid and gas), each of known density flowing as indicated by arrow 6. A venturi meter 2 measures the difference ...	08/15/1989
4776210	Multiphase fluid flow measurement systems and methods The total mass flowrate of a multiphase fluid flowstream such as a water, oil and gas mixture being produced from subterranean wells is determined by passing the flowstream through an apparatus which forces a substantial change in direction of the fluid f...	10/11/1988
4481808	Method and apparatus for detecting the concentration of a component in a solution Method and apparatus for determination of the concentration of a component in a solution, such as ethyl alcohol in gasohol, acetic acid in hexane-acetic acid solution, or the like. Such determination is made with ease and accuracy based on a rate of press...	11/13/1984
4455860	Method and apparatus for determining CO₂ minimum miscibility pressure of reservoir oil A method for determining the CO2 minimum miscibility pressure (MMP) is disclosed which comprises filling a coiled capillary tube with oil at a predetermined temperature T1 and an initial predetermined pressure P1 less than...	06/26/1984

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Class 73/61.47 - By pressure measurement