The EMDS-TM-42E gamma-electromagnetic defectoscope imported from Russia is an engineering logging tool to inspect casing damages and is used through tubing.

• 俄罗斯EMDS-TM-42E电磁探伤测井仪是一种检测管柱损坏状况的工程测井仪,可过油管测量,主要描述油管套管的变形、裂缝等参数。