High temperature fluid test instrument

Details High temperature fluid test instrument High temperature fluid test instrument

2007-01-08

2010-06-29

Raevis, Robert R (Department: 2856)

Measuring and testing

Simulated environment

Reexamination Certificate

active

07743674

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.

REFERENCES:
patent: 7128142 (2006-10-01), Heathman et al.
patent: 7128149 (2006-10-01), Heathman et al.
patent: 2006/0060381 (2006-03-01), Heathman et al.
Chandler Engineering, Water-Wetting Capability Tester, 2-page brochure entitled “Drilling Fluids-Viscosity”, copyright 2005.

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