内切割下接式锚定器的研制及试验

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中图分类号：TE935文献标识码：A DOI：10.12473/CPM.202410045

Abstract：To solve the problems of low cutting effciency and unstable cutting fracture quality caused by severe vibration and eccentric rotation of the cuter device in downhole hydraulic cuting operation of tubing and casing，a cuter down-atached anchor tool was developed，which could also realize conventional power upattachment under special working conditions.The tool uses a rotary seal structure to achieve the“rotation + anchoring”function of theanchor，and solves the problems of small anchoring range and unstableanchoring through blade-type anchor blocks and a dual-piston structure.The field test results show thatthe down-atached anchor and the hydraulic cuter exhibit excellent operational compatibility.Compared with up-attached anchor cutting operation，the tool string isnot eccentric after cuting operation of down-attached anchor，and the overallcutting time is reduced from 4 min to ，with cutting time shortened by 50% .The down-attached anchorstructure can simultaneouslyanchorat least two sizes of tubing，indicating that it maintains anchoring stability even atlargeropening angles.The tool features a simplified and reliable structure，with universal applicability acrossmultiple sizes and working conditions.The successful development of the tool provides guidancefor further improving the efficiency of field cutting operations.

Keywords： downhole tool； hydraulic cutting；tubing anchoring；anchor blook；cutting operation；downattached structure；rotary locking mechanism

0 引言

国内油气产业发展迅速，油气开采向水平井、大斜度井和上翘井推进，复杂井况导致卡钻风险增加，对于修井切割作业需求进一步增加，同时部分废弃井处理也需要开展大量切割作业[1]。（剩余8709字）