油井套管 meaning in Chinese

oil well casing
well casing

Gravel paching method for sand control in cased hole
油井套管内砾石充填防砂工艺方法
Laboratory study of casing strength under nonuniform load
非均匀外载作用下油井套管强度特性的实验研究
Cause analysis and measures for casing failure in liaohe heavy oil wells
辽河油田稠油井套管损坏原因分析与治理措施
Petroleum and natural gas industries - steel pipes for use as casing or tubing for wells
石油和天然气工业.油井套管或油管用钢管