High temperature fluid test instrument
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United States of America Patent
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Jun 29, 2010
Grant Date -
Jul 10, 2008
app pub date -
Jan 8, 2007
filing date -
Jan 8, 2007
priority date (Note) -
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Abstract
An apparatus that can determine the water wettability of fluid at simulate downhole conditions. For example, a spacer fluid and a drilling mud mixture can be tested under a specified pressure and a specified temperature that simulate downhole conditions. Additionally, a shear rate may be applied to the fluid mixture that is substantially identical to the shear rate that will be exerted on the mixture due to downhole geometries and conditions. The apparatus may also provide the viscosity of the fluid under the designated pressure, at the specific temperature, and under the specified shear rate. The apparatus may also be used to determine the amount of spacer fluid that would need to be added to a drilling mud to improve the rheological properties of the mixture to provide adequate water wettability as well as the displacement of the mixture during the cementing process of a wellbore.
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