UNE-EN ISO 13500:2008/A1:2010 Petroleum and natural gas industries - Drilling fluid materials - Specifications and tests - Amendment 1: Barite 4,1 (ISO 13500:2008/AMD 1:2010) (Endorsed by AENOR in January of 2011.)
2011UNE-EN ISO 13500:2008/A1:2010 Petroleum and natural gas industries - Drilling fluid materials - Specifications and tests - Amendment 1: Barite 4,1 (ISO 13500:2008/AMD 1:2010) (Endorsed by AENOR in January of 2011.)
2009UNE-EN ISO 13500:2008/AC:2009 Petroleum and natural gas industries - Drilling fluid materials - Specifications and tests (ISO 13500:2008/Cor 1:2009) (Endorsed by AENOR in December of 2009.)
2008UNE-EN ISO 13500:2008 Petroleum and natural gas industries - Drilling fluid materials - Specifications and tests (ISO 13500:2008) (Endorsed by AENOR in December of 2008.)