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我队××矿区ZK_(86)孔，施工至孔深690米时发生埋钻事故。在处理事故过程中又发生反丝钻杆折断。其断头由于强力提拔变形呈鸭咀状，并弯曲在溶洞中（如图1所示）。该孔上部下入φ108套管至270米。在溶洞416～420米处事故钻杆断头位于419.36米，其下均在φ91孔径中。由于事故头弯曲于溶洞中，上部又受φ108口径的限制，矢锥极不易对头。我们先采用弯钻杆带公锥去摸头，没有摸到。后改用钻杆勾子（用φ50园钢特制的）去捞
I × × mine ZK_ (86) hole, drilling hole depth of 690 meters occurred when the buried drill accident. In the process of dealing with the accident occurred again anti-wire rod broken. Its decapitation due to the strong promotion of deformation ducks Tsui, and bending in the cave (Figure 1). The upper part of the hole into the φ108 casing to 270 meters. In the cave 416 ~ 420 meters at the accident drill pipe is located at 419.36 meters, which are under φ91 aperture. As the accident head bent in the cave, the upper part of the hole by the diameter of φ108 restrictions, vector cone very difficult to match. We first use curved drill pipe with cone to touch the head, did not touch. After the switch to drill hook (with φ50 garden steel specially made) to fishing