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井壁声波测井仪于一九七四年四月开始研制,一九七五年四月做出样机,经改进后于七六年五月开始进行现场试验,初步见到良好效果。试验中达到的主要性能和指标1.机械式推靠器
The well wall acoustic logging tool was developed in April 1974 and prototype was made in April 1975. After the improvement, field tests were started in May 1976 to initially achieve good results. Test to achieve the main performance and indicators 1. Mechanical thrust device