河南油田卡点以上管柱倒扣打捞方法简介

Introduction to back-off fishing for pipe above the sticking point in Henan Oilfield

本文针对管柱倒扣时伸长量、浮力、拉力和扭矩的变化规律,形成了完善的高效倒扣方法。现场施工证明,卡点以上管柱倒扣打捞效率显著提高,施工时间明显缩短。

This article demonstrates a high-efficient back-off fishing based on the studies on the changes of buoyancy,elongation,pull,and toque of pipe string in back-off. The onsite practices prove that the fishing efficiency for the pipe above the sticking point surges so as to shorten the construction time.