Simple and efficient fractured drill pipe catching device and catching method thereof

Abstract

The invention discloses a simple and efficient fishing device for broken drill pipes, which includes a connecting rod, a "9"-shaped eccentric hook is arranged horizontally at the end of the connecting rod, and a guiding and positioning cone is vertically arranged at the bottom of the eccentric hook. The tip of the eccentric hook is provided with a guiding and positioning rod. The fishing method of the above-mentioned fishing device includes the following steps: firstly, the above-mentioned fishing device is connected with the drill pipe, and put into the drill hole; the fishing device is slowly dropped, and the top of the broken drill pipe is tilted through the guiding and positioning cone; then, the drilling machine is started And rotate at a slow speed, guide the broken drill pipe into the eccentric hook through the guide positioning rod; at this time, speed up the drilling machine speed, so that the broken drill pipe enters the eccentric hook slot and is clamped; slowly lift the fishing device, and lift the broken drill pipe out of the borehole. The invention can quickly and accurately search for broken drill pipes, and effectively solves the problem of fishing broken drill pipes in the pile foundation hole forming process, thereby ensuring smooth construction and pile foundation engineering quality.

Description

technical field [0001] The invention relates to building engineering construction, in particular to a simple and efficient fishing device and fishing method for broken drill pipes in pile foundation holes. Background technique [0002] At present, there are more and more high-rise buildings, and the requirements for foundation treatment are also increasing accordingly. The mud retaining wall bored pile has become a main form of foundation construction for high-rise buildings. During the drilling construction process, the drill pipe often breaks due to the long service life of the drill pipe or the encounter of hard geological objects during the drilling process. If it is not processed in time or the fishing measures are improper, it is very easy to cause hole collapse and affect the construction quality of the pile body. What is more serious is that it will lead to large-scale collapse of boreholes, resulting in waste holes, which need to be backfilled, and the positions of...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a simple and efficient fishing device for fractured drill pipe and its fishing method, to solve the problems of inconvenient operation, low efficiency and easy failure in the existing fishing device and fishing method. Disadvantages such as high cost

Images