Fishing tool and fishing method using same

Abstract

The invention relates to the field of drilling, and discloses a fishing tool and a fishing method using the same. The fishing tool comprises a tool body, a pull hook, a screw tap and at least one magnet, wherein the tool body is of a hollow structure, and a notch is formed in the lower end of the tool body; an opening is formed in the side wall of the lower end of the tool body, and the connectingend of the pull hook is rotatably arranged at the opening; the magnet is arranged on the inner surface of the side wall of the lower end of the tool body; the screw tap is arranged in the tool body and can move up and down, and the working end of the screw tap is located on the upper portion of the magnet. The fishing tool has a good fishing effect, and particularly has a good fishing effect on adrilling pipe deeply buried in a well wall; the length of the pull hook and the diameter of the tool body can be selected and adjusted to adapt to different drilling structures according to conditions of the well wall and an upper well diameter.

Description

technical field [0001] The invention relates to the field of drilling, in particular to a fishing tool and a fishing method thereof. Background technique [0002] Generally, the tubular falling objects in drilling are drill pipes. The drill pipe is a steel pipe with a threaded tail, which is used to connect the surface equipment of the drilling rig and the drilling and grinding equipment or the bottom hole device at the bottom of the drilling well. The purpose of the drill pipe is to transport the drilling mud to the drill bit and together with the drill bit to raise, lower or rotate the bottom hole device. Drill pipe must be able to withstand enormous internal and external pressure, twisting, bending and vibration. In the process of oil and gas extraction and refining, the drill pipe can be used many times. However, in the drilling process, often due to the instability of the well wall, the rock formation collapses, and the drill pipe breaks and is buried in the well wal...

AI Technical Summary

Problems solved by technology

[0004] However, the existing drill pipe fishing methods mainly have the following disadvantages: using ordinary reaming methods for drilling pipe fishing, the cycle is long and the cost is very high

Due to the small diameter of the upper well, the entry of larger-sized fishing tools is limited. If conventional drilling methods are used, only small-sized fishing tools can be used to salvage the drill pipes buried deep in the well wall; but this The salvage method has almost no effect, resulting in the scrapping of part of the drilling section or even the whole well, resulting in great economic losses and delays in the construction period

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