The casing collar locator is an electric logging tool that detects the magnetic anomaly caused by the relatively high mass of the casing collar.
套管接箍定位器是一种电测井下井仪器，它检测由套管接箍的相对较高的质量所引起的磁异常。
The casing collar locator is an electric logging tool that detects the magnetic anomaly caused by the relatively high mass of the casing collar.
套管接箍定位器是一种电测井下井仪器，它检测由套管接箍的相对较高的质量所引起的磁异常。
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