求翻译：它是放射性仪器，能用于裸眼井，更经常用于套管井。当前的小直径仪器，还可穿越油管、或在油管中测井，是开发测井的重要手段之一。是什么意思？

It is radioactive instruments, can be used the openhole more often used in cased hole. Small diameter instrument, but also through the tubing, the tubing logging is one of the important means of development of logging.

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It is the radioactive instrument, can use in the bare hole, uses in the case well frequently.Current minor diameter instrument, but also may pass through the drill tubing, or in the drill tubing the oil well logging, develops one of oil well logging important methods.

It is radioactive instruments that could be used for open hole well, more frequently used in the casing. Small diameter of the current instrument, also through the tubing, or logging in the tubing, is one of the important means of development and logging.

正在翻译，请等待...