Petrochemicals | Viscosity Measurement of Drilling Fluids with RheolabQC
Learn more about the rheological characterization of drilling fluids and muds with the rotational rheometer RheolabQC. This report describes the advantages of determining the rheological properties of drilling fluids and muds for improved product performance.
The essential function of a drilling fluid is minimizing the amount of cuttings around the drill bit and in the well bore. Drilling fluids used to be a simple mixture of water and clay, but today various organic and inorganic products are added which influence the fluids rheological properties. If more water is added to the mixture, the viscosity decreases overall and if bentonite is added, the viscosity increases. Polymers increase it only at higher shear rates and white lime increases it at lower shear rates. This report shows how the viscosity of drilling fluids can be characterized using RheolabQC.
Experimental Setup
All measurements were performed with an Anton Paar RheolabQC rheometer with cylinder measuring system CC39 according to ISO 3219. The norm describes the construction of the cylinder geometry and defines the ratio of measuring cup diameter to measuring bob diameter as 1.0847. This guarantees an industrial standard for shearing in the measuring gap, independent of the measuring system size and manufacturer. The measurement was performed at 40 °C with the Peltier temperature device C-PTD 180/AIR/QC for quick and accurate temperature control.
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