Because we have no special fish tool;operation equipments are limited,so it takes a longer time when we do the fishing by box tap and overshot with slot,and the effect is also not good.

• 针对胜利油田水平井修井技术还不十分完善、大部分作业沿用直井的常规修井工具的现状,研制了利用提放方式实现退出的可退式打捞工具,并形成了本体打捞和对扣打捞两种系列。