Determining Fluid Density
AssigneeHalliburton Energy Services, Inc.
InventorLi Gao
Life of this patent
Estimating the term…
Abstract
The density of a fluid is determined using a vibratory resonant densitometer in an environment. The densitometer includes a tubular sample cavity and other densitometer parts. The method includes measuring a plurality of parameters characterizing the environment. The method further includes adjusting a model of the sample cavity using the measured parameters. The method further includes receiving a sample fluid into the sample cavity. The method further includes vibrating the sample cavity to obtain a vibration signal. The method further includes calculating the density of the sample fluid using the model and the vibration signal.
Claims20
A method for determining the density of a fluid using a vibratory resonant densitometer in an environment, the densitometer including a sample cavity and other densitometer parts, the method comprising:
- measuring, at a time the density of the fluid is to be determined, a plurality of parameters characterizing the environment, the plurality of parameters comprising the temperature of the sample cavity;
- adjusting, at the time the density of the fluid is to be determined, a model of the sample cavity using the measured parameters, the model including the temperature dependent Young's modulus of a material used to make the sample cavity, and adjusting the model of the sample cavity comprising calculating the temperature dependent Young's modulus of the material used to make the sample cavity using the measured temperature of the sample cavity;
- receiving a sample of the fluid into the sample cavity;
- vibrating the sample cavity to obtain a vibration signal;
- and
- calculating the density of the sample fluid using the model and the vibration signal.
3-5. (canceled)
A computer program, stored on a non-transitory computer-readable tangible medium, for determining the density of a fluid using a vibratory resonant densitometer in an environment, the densitometer including a sample cavity and other densitometer parts, the computer program comprising executable instructions that cause a computer to:
- measure, at a time the density of the fluid is to be determined, a plurality of parameters characterizing the environment, the plurality of parameters comprising the temperature of the sample cavity;
- adjust, at the time the density of the fluid is to be determined, a model of the sample cavity using the measured parameters, the model including the temperature dependent Young's modulus of a material used to make the sample cavity, and adjusting the model of the sample cavity comprising calculating the temperature dependent Young's modulus of the material used to make the sample cavity using the measured temperature of the sample cavity;
- receive a sample of the fluid into the sample cavity;
- vibrate the sample cavity to obtain a vibration signal;
- and
- calculate the density of the sample fluid using the model and the vibration signal.
12-13. (canceled)
A method for measuring a property of a substance using a device operating in an environment, the method comprising:
- calculating a temperature dependent Young's modulus for a material used to make a sample cavity within the device using:
- data concerning the device;
- and
- data concerning the environment, the data including the temperature of the sample cavity at the time the property is to be measured;
- inserting the calculated temperature dependent Young's modulus into a model of the device;
- calculating a value for the property using:
- the model of the device;
- and
- data regarding the substance.
22-25. (canceled)
Dependencies are inferred from the claim text.