Well digging process of mining vertical shaft by adopting one-drilling well completion and well drilling method

Abstract

The invention relates to a well digging process of a mining vertical shaft by adopting a one-drilling well completion and well drilling method. The well digging process is mainly used for solving the problems of large equipment occupation rate, high engineering cost, low working efficiency and sloe well completion speed in the existing well completion process of the mining vertical shaft. The well digging process mainly comprises the following steps: 1) drilling the shaft; 2) prefabricating the well wall; 3) sinking the well wall; and 4) carrying out wall back filling; the well is completed by only adopting the way of a primary pilot hole and a primary core drilling hole in the 1) shaft drilling process, the process can greatly improve the well completion speed of well digging by the welldrilling method by about 20%; furthermore, as the process only adopts the primary pilot hole for drilling, the process can reduce the equipment occupation rate, reduce the discharge amount of slurry by about 20% and reduce the environmental protection; due to the adoption of a high-power drilling machine, a special drilling tool and reasonable technical parameters, the skew ratio of the well completion is less than 0.04%.

Description

Technical field: [0001] The invention relates to a construction technique of drilling a well in the construction of a mine shaft, in particular to a drilling technique for a shaft of a mine shaft and into a well. Background technique: [0002] Drilling is a fully mechanized and comprehensive drilling process. The staff works on the ground to realize drilling without going down the well. The construction process includes ① crushing, carrying, conveying and separation of formation rock and soil; ② step-by-step expansion of the well; ③ temporary support of the side of the well; The rotary table of the large-diameter drilling rig arranged on the ground is used to drive the drill pipe, and the drill pipe drives the drill bit to rotate, and the hob on the drill bit realizes self-rotation and revolution. Afterwards, after several times of expanding the well and correcting the deviation and deviation of the well, when the design diameter is reached, the prefabricated reinforced con...

AI Technical Summary

Problems solved by technology

The existing drilling method involves multiple reaming drilling processes. Although multiple reaming can make relatively effective use of the drilling rig's capacity, there are still many problems: multiple reaming bits are required, and the equipment occupies a large amount. High cost; long auxiliary working hours, low work efficiency, and slow well completion speed, which cannot meet the needs of rapid well construction

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