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本文针对油管偏磨而导致油管穿孔、裂口、变形等落井,鱼顶不规则、抗拉强度低的情况,采用过鱼顶打捞技术。对LT-T114×73型蓝式卡瓦捞筒上接头进行改进,使其最小通径变大,落鱼不规则部分能顺利通过捞筒接头;并改进打捞管柱组合,为落鱼裂开、变形部分提供空间,确保蓝式卡瓦能卡住落鱼规则圆柱形部分;使其符合过鱼顶打捞作业的要求。实现有效打捞,提高打捞一次成功率。在现场的应用中取得了较好效果,为今后同类型井下工程事故的处理提供了一种有效的处理方法。
In this paper, due to tubing partial wear and tear caused by tubing perforation, rips, deformation and other downhole, irregular fish tops, low tensile strength, fish-top fishing technology. Improvement on the connector of LT-T114 × 73 blue type carboy, which makes the minimum diameter larger, and the irregular part of the fish can be smoothly passed through the fishing rod joint; and improve the combination of salvage pipe string to crack the falling fish , The deformation part provides space to ensure that the blue slip can catch the regular cylindrical part of the falling fish and make it comply with the requirements of the fish top salvage operation. To achieve an effective recovery, improve the success rate of a salvage. In the field of application has achieved good results for the future with the type of underground engineering incident handling provides an effective approach.