Drilling/completion fluids

Inline Setup Provides Automatic Measurement of PVT Behavior of Drilling Fluids

This paper presents the design and functionality of an apparatus that measures directly and automatically the pressure/volume/temperature (PVT) behavior of the drilling fluid contained in a pit.

Schematic of a setup capable of measuring the PVT behavior, specific heat capacity, and thermal conductivity of a drilling fluid.
Fig. 1—Schematic of a setup capable of measuring the PVT behavior, specific heat capacity, and thermal conductivity of a drilling fluid.

The mass density of drilling fluids usually is measured manually with a mud balance. The pressure and temperature dependence of the mass density of the fluid [i.e. its pressure/volume/temperature (PVT) behavior] then is estimated. Variations in the composition of the fluid mix and uncertainties regarding the PVT behavior of each component, however, may lead to inaccuracies.

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