在采用涡轮钻具钻进的过程中,钻具的落井事故,常常是由于涡轮外壳上部大小头丝扣连接处发生折断造成的。处理这种事故相当困难。例如,四川省石油管理局泸州气矿洞6井在1972年发生8″涡轮钻具大小头丝扣连接处折断落井事故,打捞作业进行了十三天才告完成。 为了解决涡轮钻具打捞工作的困难和防止发生恶性事故,该矿钻具大队涡轮车间的工人,于1972年4月在全部涡轮钻具上都安装了打捞头。打捞头由丝扣连接在涡轮轴的上端。 In the process of drilling with a turbo-drill, the falling accident of the drilling tool is often caused by the breakage of the first threaded connection at the upper part of the turbine casing. It is quite difficult to handle such accidents. For example, the Sichuan Petroleum Administration Luzhou gas hole 6 wells occurred in 1972, the size of the first 8-inch screwdriver threaded connections broken off accident, salvage operations were completed for 13 days.In order to solve the work of the turbine drilling salvage Difficulties and prevention of a catastrophic accident, workers in the turbine shop at the mine’s drilling unit installed a fishing head on all of the turbine tools in April 1972. The fishing head was threaded onto the upper end of the turbine shaft.