井下落井仪器多鱼顶堆积打捞办法

Fishing Measure for Multi-fish Accumulation of Instrument Falling Down into Well

XX井在水平井斜导眼测井中遇卡,穿心打捞成功后上提电缆时由于钻具活动时钻具拉断,钻具及放射性仪器串落井,落鱼断为几节。常规的打捞方法已经不能从复杂井眼中将仪器捞出,采取钻具摸鱼顶、调整钻井液、磨鞋磨鱼顶、强磁打捞残渣,套铣及多种套筒将仪器成功捞出。通过介绍打捞的过程,分析了打捞的难点,总结出解决此类事故的办法。

It is stuck at the horizontal guide hole in XX wells,when lifting cable after successful core salvage,tools and instruments with radioactive fall because drilling cells snap for their activities,the fish is cut into several sections.Conventional salvage method is not adapted to the complex borehole to fish out the instrument.Using tech of drill fish top,adjusting drilling fluid,milling shoe mill fish top,strong magnetic die residue,milling and the sleeve salvage the fall instruments successfully.Through introduction of salvage process,its difficulties are analyzed,and methods to solve this kind of accident are summed up.