Waterproof rock soil core drilling tool

Abstract

The invention discloses a waterproof rock soil core drilling tool which comprises a drilling tool outer pipe (5) and a reamer (4) connected with the drilling tool outer pipe (5). An advance spray drill bit (1) is connected with the reamer (4); one end of a rock core semi-closed inner pipe coupling (2) is located on an inner side base of the advance spray drill bit (1), and the other end is connected with a rock core semi-closed inner pipe (3); the upper end of the rock core semi-closed inner pipe (3) is connected with a liquid flow one-way ball valve (6); an inner-out pipe joint (8) is arranged in the drilling tool outer pipe (5): a liquid flow through hole (10) is arranged on the inner-outer pipe joint (8); and a rock core semi-closed inner pipe position adjusting mechanism is arranged between the inner-outer pipe joint (8) and the rock core semi-closed inner pipe (3). According to the invention, as the flow path of the drilling fluid flow is changed so that the drilling fluid does not scour the rock core directly, the water-sensitive rock soil core easily dissolved in the drilling fluid is protected, the rock soil core recovery is increased, the waterproof rock soil core drilling tool can ensure 100% of rock soil core recovery, and the quality of the drilling engineering is improved.

Description

technical field [0001] The invention relates to a drilling tool, in particular to a water-resistant rock and soil core drilling tool used for solid ore deposit exploration and engineering geological investigation. Background technique [0002] During the drilling process of solid mineral deposit exploration and engineering geological survey, water-sensitive or water-soluble rock and soil layers are often encountered. At this time, ordinary single-pipe drilling technology or ordinary double-pipe drilling technology, or even wireline core drilling is adopted. Due to the drilling fluid directly contacting and scouring the rock-soil core during the drilling process, the rock-soil core is dissolved in water, making it impossible to collect the rock-soil core during drilling, or the rock-soil core taken cannot meet the requirements of drilling quality. requirements, which brings about the scrapping of boreholes or the inefficiency of engineering quality. Contents of the inventio...

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Problems solved by technology

[0002] During the drilling process of solid mineral deposit exploration and engineering geological survey, water-sensitive or water-soluble rock and soil layers are often encountered. At this time, ordinary single-pipe drilling technology or ordinary double-pipe drilling technology, or even wireline core drilling is adopted. Due to the drilling fluid directly contacting and scouring the rock-soil core during the drilling process, the rock-soil core is dissolved in water, making it impossible to collect the rock-soil core during drilling, or the rock-soil core taken cannot meet the requirements of drilling quality. requirements, which leads to scrapped drilling or inefficiencies in engineering quality

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