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Continuous measurement of drilling fluid rheological characteristics involves using adapted sensor on circulation pipe, to determine rheogram
Continuous measurement of drilling fluid rheological characteristics involves using adapted sensor on circulation pipe, to determine rheogram
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机译:连续测量钻井液的流变特性涉及在循环管上使用自适应传感器来确定流变图
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摘要
Complex dynamic viscosity is measured using an adapted sensor on a circulation pipe. The rheogram of the fluid is deduced, from the law of variation of viscosity as a function of shear. At least one characteristic parameter of the fluid rheology is calculated, starting from the rheogram. This process is repeated after a given interval. Changes in the parameter and in characteristics of the fluid are deduced. Complex dynamic viscosity is measured using an adapted sensor (6) placed on a circulation pipe (5). This obtains the law of variation of complex viscosity eta' as a function of 2pif, where f is the excitation frequency of the sensor. The rheogram of the fluid is deduced, from the law of variation of viscosity eta as a function of shear (gamma'). At least one characteristic parameter of the fluid rheology is calculated, starting from the rheogram. This process is repeated after a given interval. Changes in the parameter and in characteristics of the fluid are deduced. An Independent claim is included for the corresponding system which includes the sensor as indicated, means of calculation and a recording system for the change in fluid characteristics with time.
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