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在大斜度井井下作业过程中,通常使用的技术主要是切割、倒扣、打捞、套磨铣等。但由于存在储层认识不足,井眼或井身结构复杂,修井工具选择不匹配或操作不合适等因素,井下故障时有发生。而传统的将切割和打捞工艺分开进行的修井作业,不仅施工周期长、劳动强度大、原材料消耗多,而且作业成本很高。本文综合考虑了大斜度井修井中在地面进行加压、上提或驱动倒扣时,加不上钻压、扭矩不能被充分传递到井下,以及同一井段长时间重复作业,可能导致的损伤套管等问题,提出运用割捞一体化管柱组合和液压倒扣器井下倒扣,在大斜度井中进行井下故障处理的技术,将切割与打捞工艺结合起来,将切割工具和打捞工具连接起来,组合成为一趟管柱,完成切割和打捞的一体化作业。应用结果表明,割捞一体化技术能顺利完成作业,极大地缩短了施工周期,降低了作业成本,并由于工期缩短等,减少了对油气层的伤害。
In the process of downhole operation, the most commonly used techniques are cutting, buckling, salvage, grind milling and the like. However, due to lack of understanding of reservoirs, complicated borehole or well structure, mismatch of workover tools or improper operation, downhole faults occur from time to time. However, the traditional workover work that separates the cutting and the salvage process not only has long construction period, high labor intensity, consumes more raw materials, and has higher operating costs. This paper takes into account the high-deviated well workover in the ground when the pressure on the lift or drive undercut, plus not drill pressure, the torque can not be fully transmitted to the well, and the same section of a long time repeated operations, may result Damage casing and other issues, put forward the use of integrated fishing and fishing column undercutting downhole buckle, downhole in high-deviated well troubleshooting technology, cutting and fishing technology will combine cutting tools and fishing tools Connect together to form a trip string, complete the cutting and fishing operations integration. The application results show that the integrated technology of cutting and fishing can finish the operation successfully, which greatly shortens the construction period and reduces the operating cost, and reduces the damage to the hydrocarbon layer due to shortened construction period and the like.