EN ISO 13503-1:2005 Petroleum and natural gas industries Completion fluids and materials Part 1: Measurement of viscous properties of completion fluids
2011EN ISO 13503-1:2011 Petroleum and natural gas industries - Completion fluids and materials - Part 1: Measurement of viscous properties of completion fluids (ISO 13503-1:2011)
2005EN ISO 13503-1:2005 Petroleum and natural gas industries Completion fluids and materials Part 1: Measurement of viscous properties of completion fluids