CEN/TC 12
| Registration number (WIID) | Project No. | Title | Status |
|---|---|---|---|
| 111 | EN ISO 13500:1998 | Petroleum and natural gas industries - Drilling fluid materials - Specifications and tests (ISO 13500:1998) | Atcelts |
| 23841 | EN ISO 13500:2006 | Petroleum and natural gas industries - Drilling fluid materials - Specifications and tests (ISO 13500:2006) | Atcelts |
| 27211 | EN ISO 13500:2008 | Petroleum and natural gas industries - Drilling fluid materials - Specifications and tests (ISO/FDIS 13500:2008) | Izstrādē |
| 34078 | 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) | Izstrādē |
| 33577 | EN ISO 13500:2008/AC:2009 | Petroleum and natural gas industries - Drilling fluid materials - Specifications and tests (ISO 13500:2008/Cor 1:2009) | Izstrādē |
| 27043 | EN ISO 13501:2006 | Petroleum and natural gas industries - Drilling fluids - Processing systems evaluation (ISO 13501:2005) | Atcelts |
| 34709 | EN ISO 13501:2011 | Petroleum and natural gas industries - Drilling fluids - Processing equipment evaluation (ISO 13501:2011) | Izstrādē |
| 24011 | EN ISO 13503-1:2005 | Petroleum and natural gas industries - Completion fluids and materials - Part 1: Measurement of viscous properties of completion fluids (ISO 13503-1:2003) | Atcelts |
| 28366 | EN ISO 13503-1:2005/AC:2007 | Petroleum and natural gas industries - Completion fluids and materials - Part 1: Measurement of viscous properties of completion fluids (ISO 13503-1:2003/Cor 1:2005) | Atcelts |
| 34629 | EN 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) | Izstrādē |
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