GB/T 20657-2011
China national
standard english version:
GB
中华人民共和国国家标准
NATIONAL
STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 20657-2011
Petroleum and natural gas industries - Equations and calculations for the properties of casing, tubing, drill pipe and line pipe used as casing and tubing 石油天然气工业套管、油管、钻杆和用作套管或油管的管线管性能公式及计算
Issued Date:2011-12-30
Implemented Date:2012-06-01
Issued by:
The Standardization Administration of the People's Republic of China