Two-way combined drilling rig

Abstract

The invention discloses a two-way combined drilling rig which comprises a drill rod (1) for intermediate support, drill rod couplings (2) disposed on ends of the drill rod (1), a small-diameter coreless drill bit (5) linked with one of the drill rod couplings (2), and a large-diameter coring drill bit (3) disposed on one of the drill rod couplings (2) and connected with the drill rod (1) in a sleeving manner; through the drill rod (1), the connection of the drill rod couplings (2) is realized; through the drill rod couplings (2), the connection of the large-diameter coring drill bit (3) and the small-diameter coreless drill bit (5) is realized, a drilling operation is implemented by the small-diameter coreless drill bit (5), and a reaming operation is implemented by the large-diameter coring drill bit (3), therefore, the two-way combined drilling rig is suitable for different geological drilling operations, and the drilling efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of application of high-power drilling equipment in mining areas, in particular to a two-way combined drilling device. Background technique [0002] The Feicheng mining area in Shandong is a well-known Dashui mining area in China. The hydrogeological conditions are extremely complex. Currently, the mining of coal in the lower carboniferous Taiyuan Group requires grouting reconstruction on the working face. Due to complex hydrogeological conditions and other factors, individual hole sections are hard or broken, making construction more difficult, and even waste holes may appear, which seriously restricts production and delays the normal connection of the stope. In view of this situation, the industry is currently vigorously promoting Use high-power drilling equipment and adopt measures such as thickening and strengthening drilling tool specifications to overcome the disadvantages of the existing technology. ...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a two-way combined drilling device, which solves the problem that in the original drilling process of the drill bit and the drilling method: drilling in the rock breaking section is prone to hole collapse accidents, resulting in buried drilling. Waiting for accidents in the hole reduces the drilling efficiency and even leads to waste holes; after drilling with a small-diameter drill bit in the hard section of the rock, the drill is lifted and then replaced with a large-diameter drill bit for reaming. The problem of time-consuming and laborious construction meets the needs of enterprise production.

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