小井眼井打捞工具的研制与应用

小井眼井因其套管内径小，工具选择局限性大，加之落物复杂多样，施工难度大。为此，研制了油管节箍倒扣接头、防上窜外钩、可调式三球捞筒等小井眼井打捞工具，介绍了这几种打捞工具的结构、工作原理、技术特点、现场应用实例。这几种工具的应用提高了小井眼井打捞成功率，解决了小井眼井大修施工困难的问题，为小井眼井打捞提供了一定的技术借鉴。

Development and application of fishing tool in slim hole wells

It is difficult to implement treatment in slim hole wells because of the small internal diameter of casing, big limitation on tool selection and complexity and diversity of falling objects. Aimed at this, a series of fishing tools in slim hole wells was developed including oil pipe hoop back off sub, prevent channeling external hook and three adjustable ball overshot. The structure, operational principle, technique characteristics and field application cases of these tools were introduced in this paper. The application of these tools greatly enhanced the salvage success rate solved difficult problem of implement treatment in slim hole wells, which provide some technical reference for fishing in slim hole wells.