Coiled tubing fishing, milling and cutting integrated device

Abstract

The invention discloses a coiled tubing fishing, milling and cutting integrated device which comprises an external pipe fitting and an internal pipe fitting, and the external pipe fitting comprises an upper connector, an upper cylinder body, a slip outer cylinder, an extension section, a lower cylinder body and a guide shoe which are sequentially connected together through threads from top to bottom; the internal pipe fitting comprises an upper fishing assembly and a lower casing milling and cutting assembly, the upper fishing assembly comprises a sliding sleeve arranged in the upper barrel and a central pipe in threaded connection with the lower end of the sliding sleeve, and a continuous guide groove is formed in the circumference of the outer wall of the sliding sleeve; and the side wall of the upper cylinder body is fixedly connected with a sliding pin which is in sliding fit with the guide groove. According to the continuous oil pipe fishing tool, continuous oil pipe fishing operation can be conducted firstly, if sticking points exist on the lower portion of a fish of the continuous oil pipe, milling and then fishing can be conducted, if multiple sticking points exist, milling and cutting can be conducted and then fishing can be conducted, milling, cutting and fishing are completed at a time, the fishing efficiency is improved, the labor intensity of workers is relieved, and the fishing operation cost is reduced.

Description

technical field [0001] The invention relates to a casing, milling and cutting integrated device for coiled tubing salvage, and belongs to the technical field of coiled tubing salvage. Background technique [0002] With the development of oilfield development technology and the gradual improvement of coiled tubing drilling and workover technology, the use of coiled tubing is becoming more and more common. It can be used for coiled tubing drilling, sidetracking, fishing operations, as injection / siphon, coiled tubing completion, continuous Tubing perforating, fracturing and other operations, in the process of coiled tubing operations, due to grit sinking, downhole sticking, downhole dirt sticking, downhole wax sticking, the use of coiled tubing is also accompanied by downhole sticking , falling off and other downhole accidents, but the coiled tubing salvage currently has no complete fishing tools and fishing methods, because the coiled tubing has no coupling coupling, it is dif...

AI Technical Summary

Problems solved by technology

[0002] With the development of oilfield development technology and the gradual improvement of coiled tubing drilling and workover technology, the use of coiled tubing is becoming more and more common. It can be used for coiled tubing drilling, sidetracking, fishing operations, as injection / siphon, coiled tubing completion, continuous Tubing perforating, fracturing and other operations, in the process of coiled tubing operations, due to grit sinking, downhole sticking, downhole dirt sticking, downhole wax sticking, the use of coiled tubing is also accompanied by downhole sticking , falling off and other downhole accidents, but the coiled tubing salvage currently has no complete fishing tools and fishing methods, because the coiled tubing has no coupling coupling, it is difficult to do jam cutting and salvage on the outer circle of the coiled tubing; some fishing tools rely on increasing the pulling force Or cut the coiled tubing by shear force, but because the coiled tubing has a small diameter and thin wall, sometimes the fishing part will be deformed and the fishing failure or the fishing part will be broken, and the shear fracture is uneven, which further makes fishing difficult and forms More complex accidents occur downhole, and the inner diameter of the coiled tubing is small, which is inconvenient for cutting and fishing the inner diameter of the water hole

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