Historical
BS EN ISO 13503-1:2005
Petroleum and natural gas industries. Completion fluids and materials. Measurement of viscous properties of completion fluids (British Standard)
ISO 13503-1:2003 provides consistent methodology for determining the viscosity of completion fluids used in the petroleum and natural gas industries. For certain cases, methods are also provided to determine the rheological properties of a fluid.
British Standards Institution [bsi]