Visual guiding type centralizing type drilling tool fishing device and method

Abstract

The invention discloses a visual guiding type centralizing type drilling tool fishing device and method. The visual guiding type centralizing type drilling tool fishing device comprises a plug short section shell, a centralizing short section shell, a guiding short section shell and a visual fishing short section shell which are sequentially connected. A camera is arranged in the visual fishing short section shell; transmission mandrels are arranged in the centralizing short section shell and the guiding short section shell, and the transmission mandrels can axially move to drive guide inner shafts to rotate; guide supporting sliding block assemblies are arranged on the guide short section shell, when the guide inner shaft axially moves till the guide supporting sliding block assemblies abut against the guide sections of the guide inner shafts, the guide supporting sliding block assemblies extend out in the radial direction, and the radial extending length of each guide supporting sliding block assembly can be changed along with rotation of the guide inner shafts; and the guide supporting sliding block assemblies support the hole wall, under the reaction of the supporting force of the hole wall, the relative position of the axis X of the end part of the fishing device and the axis of the drill hole is controlled, and smooth alignment and connection with a fallen fish in the hole are realized. The visual guiding type centralizing type drilling tool fishing device is not limited by the fish falling position any more, and the fishing accuracy can be improved.

Description

technical field [0001] The invention belongs to the technical field of drilling and fishing tools, and relates to a visually guided righting drilling tool fishing device and method. Background technique [0002] In recent years, with the gradual deepening of the drilling depth, the structure, structure and mechanical properties of the construction strata encountered have become more and more complex, resulting in a higher and higher accident probability of drill pipe tripping or broken rods in the hole during construction. , The drill pipe falls into the borehole and cannot be taken out, which will not only delay the construction period, but also have a profound impact on the normal development of subsequent construction operations, and even cause certain economic losses in severe cases. [0003] The drill pipe breaks or trips and becomes a fish in the hole. When using conventional fishing tools, there are many accidental situations when fishing, and the position of the fish...

AI Technical Summary

Problems solved by technology

[0002] In recent years, with the gradual deepening of the drilling depth, the structure, structure and mechanical properties of the construction strata encountered have become more and more complex, resulting in a higher and higher accident probability of drill pipe tripping or broken rods in the hole during construction. , the drill pipe falls into the borehole and cannot be taken out, which will not only delay the construction period, but also have a profound impact on the normal development of subsequent construction operations, and even cause certain economic losses in severe cases

[0003] The drill pipe breaks or trips and becomes a fish in the hole. When using conventional fishing tools, there are many accidental situations when fishing, and the position of the fish is often misaligned with the fish. At this time, it is difficult to align and connect the fish. head, and carry out normal salvage operations

If there is a certain eccentricity between the dropped drill pipe and the drilling axis, forming a "hidden head fish", the fishing range increases at this time, and then the difficulty of aligning the head of the fallen fish will increase exponentially, which will affect the smooth progress of the fishing operation

In addition, conventional fishing equipment is not equipped with visualization equipment, which is invisible during the fishing process, and cannot accurately judge the situation of fish falling in the hole before and during the implementation of fishing measures. There are blind fishing measures, low success rate of fishing and easy occurrence Problems such as secondary accidents in the hole, and several consecutive improper fishing methods will cause tripping in the hole or wear of the threaded thread at the tail of the broken drill pipe, which will increase the difficulty of subsequent salvage work and even cause serious economic losses.

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