池18井多鱼头并插深度腐蚀油管打捞技术

池18井井下油管采气15年后，井下油管严重腐蚀断落，全井形成长片、碎块、断根，其中部分井段呈现双鱼头、3鱼头叠插等情况，该井通过下各种打捞筒、母锥外捞，下各式捞矛外捞、下金刚石铣筒套铣相结合的方式，分段打捞处理。其间针对落鱼特点，不断修改工具内径或挡圈，加工了特拉式捞筒、滑块开窗捞筒、自制钢丝捞筒等多种适用性工具，最后成功打捞完多鱼头井段。文章总结了打捞过程及技术要点，可供现场生产作业借鉴。

FISHING TECHNIQUES OF THE SERIOUSLY -CORRODED TUBING WITH MULTIPLE FISHING HEAD PARALLEL INSERTION IN WELL CHI-18

Well Chi-18 has been put into gas productio n for 15 years, so that its downhole tubing was seriously corroded, broken up an d fallen down. The crushed tubing with various shapes was found in whole well, i n which the dual and triple fishing head parallel insertions were encountered in some intervals. Different tools as overshot, box tap, various trip spears and d iamond milling sleeve were used for fishing jobs. In light of the characteristic s of fishes, the fishing operations of multiple fishing head parallel insertion intervals were successfully finished at last by means of improving tool inner di ameter or retaining collar and processing many kinds of tools, such as special p ulling overshot, overshot with gliding slab slot, wireline overshot and so on. T he courses and technical main points of the fishing jobs and operations are summ arized in the paper, which may be available for reference to field production.