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Shaft sinking process for expansion well completion of mine vertical shaft with boring method

A wellbore and shaft technology, applied in well sinking, wellbore lining, shaft equipment, etc., can solve the problems of long auxiliary work time, slow well completion speed, and high engineering cost, reduce the storage site area, reduce mud discharge, and shorten drilling. effect of time

Inactive Publication Date: 2013-04-03
HUABEI MINING GRP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Shaft sinking process for expansion well completion of mine vertical shaft with boring method
  • Shaft sinking process for expansion well completion of mine vertical shaft with boring method
  • Shaft sinking process for expansion well completion of mine vertical shaft with boring method

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with accompanying drawing:

[0017] attached by figure 1 - attached image 3 Shown, this mine vertical shaft shaft one expansion well drilling method sinking process, mainly comprises the following steps:

[0018] ① Well bore drilling, ② Well wall prefabrication, ③ Sinking well wall, ④ Backfilling;

[0019] Firstly, ① wellbore drilling: including one drilling and one reaming, as attached figure 1 and attached figure 2 As shown, 2 is the drill frame, 18 is the mud, 9 is the pilot hole drill bit, and 20 is the reaming drill bit; both drilling and reaming adopt the vertical shaft drilling machine that the power head type hydraulic cylinder is used to lift. Jointly designed and manufactured by Coal Special Drilling Company, the model is AD130-1000 drilling rig; the drilling tool can choose ball tooth hob or wedge tooth hob according to geological conditions. The topsoil layer generally uses wedge toot...

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Abstract

The invention relates to a shaft sinking process for a expansion well completion of mine vertical shaft with boring method, mainly solving the problems of large amount of equipments occupied, high engineering cost, low efficiency, slow velocity of well completion in current mine vertical shaft well completion and comprising the following steps: 1) drilling a shaft; 2) prefabricating a well wall; 3) sinking the well wall; and 4) filling the sunk well wall. In the step of drilling the shaft, the modes of a primary leading hole and a primary final expanding hole are used for well completion, which can greatly improve the well completion speed of the shaft sinking with the boring method by about 20%; a primary leading hole is used for drilling only, which decreases the amount of equipment occupied, reduces slurry emission by about 20% and lowers environment pollution. By adopting a high power drilling machine, a special drilling tool and reasonable technical parameters, the well completion skewness 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-expansion 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 conc...

Claims

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Application Information

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IPC IPC(8): E21D1/06E21D5/04E21B7/06E21B7/00
Inventor 陈远坤赵时运刘志强李文增王从平蔡鑫汪船胡本杰陈发祥史基盛刘日辉赵厚胜胡光雨马进王新黄海波
Owner HUABEI MINING GRP