The workover technology lor horizontal wells in the Shengli Oilfield is not perfect, and the workover tools in vertical wells are still used in most of horizontal wells.

• 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。