A log similar to a dual induction log but made by an electromagnetic propagation tool built into a drill collar.
与双感应测井类似的一种测井方法，用安装在钻铤中的电磁传播仪进行测量。
A short pup joint that registers clearly in a collar locator log is a common flag joint.
在接箍定位器测井图中清晰地记录的一个短节是普遍使用的标志管。
First, log the pup casing, then the standard collar.
先测出短套管，再测出标准接箍。
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