非亲磁型放射源落井打捞技术

放射性测井作业过程中,不慎将放射源意外落井,因落井放射源外观形状较小,密度较大,源壳又无亲磁性,加之该井完钻深,又属定向裸眼井,类似案例处理方法寥寥无几。针对井的特殊性及落井放射源的特殊结构,按照落井放射源在井筒不同井段的存在方式,提出了3种打捞思路并发明了打捞工具,最终将落井放射源成功捞出。

Salvage Technology of the No-Magnetic Radioactive Source

In the process of radioactive logging operation,the radioactive source accidentally dropped into the well.Due to the small size and high density of the radioactive source,the source shell has no paramagnetism.In addition,the well is a directional bore hole and deep after the completion of drilling,there are few handling methods.According to the particularity of the well,the special structure of the radioactive source and the way that the radioactive source exists in different sections of the bore hole,three kinds of fishing ideas are put forward and fishing tools are invented.Finally,the radioactive source was successfully fished out.