目前我们使用的GY—74型感应测井仪存在一个主要难题,就是有的井下仪器测出来的曲线重复性误差较大,直接影响到测井的质量。几年来,由于没有检测手段,检修工作一直比较被动。从1987年3月份开始,我们利用加温巡检设备对在用的24支井下仪器电子线路逐个进行加温试验。从加温试验结果来看,井下仪器电子线路的三项主要指 At present, we use a GY-74-type induction logging tool, there is a major problem is that some downhole instruments measured curve repeatability error, a direct impact on the quality of logging. Over the past few years, due to the lack of testing methods, maintenance work has been more passive. From March 1987 onwards, we use the heating inspection equipment on the 24 in-line instrument used in the electronic circuit heating test one by one. From the heating test results, the three main indicators of underground equipment electronic circuit