Abstract
A great number of studies are dedicated to the definition of heat conductivity of drilling muds and cement slurries. It should be noted that existing works on the specification of heat conductivity of the drilling mud are based on either experimental or theoretical studies in which well conditions are reflected incompletely. Considering all above-mentioned aspects, the practical interest consists in the definition of thermal conductivity of drilling muds and cement slurries in well drilling on the basis of the data obtained at the wellhead during unsteady processes execution. The paper offers the method of definition of the heat conductivity of drilling mud and cement slurry flows based on the data of temperature change at the well entry and exit through the time, which can be recorded directly at the wellhead. The method is based on the accurate solution of reverse problem of thermal exchange in the movement of drilling mud and cement slurry via Laplas transformation.
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