Sealed pressure feed type horizontal directional drilling engineering geological survey continuous coring device

Abstract

The invention provides a sealed pressure feed type horizontal directional drilling engineering geological survey continuous coring device. The sealed pressure feed type horizontal directional drillingengineering geological survey continuous coring device comprises an outer pipe assembly and an inner pipe assembly used in cooperation with the outer pipe assembly. The outer pipe assembly comprisesa single-wall drill rod and a double-wall drill rod, the single-wall drill rod is located on the upper part of the double-wall drill rod, and an elastic clamping blocking head, an elastic clamping chamber, a hanging seat ring, a probe chamber positioning inner clamp, a probe chamber positioning outer clamp, a centralizing ring, a clamping spring seat and a drill bit are sequentially arranged on the inner wall of the double-wall drill rod from top to bottom. The inner pipe assembly is located in the drill rod and comprises a spear head, a first sealing part, an elastic clamp positioning mechanism, a recycling pipe, a second sealing part, an in-place signal reporting mechanism, a rock core blockage alarming mechanism, a single-action mechanism, a guiding mechanism, a buffering mechanism, anadjusting mechanism, a rock core pipe and a rock core clamping and taking mechanism which are sequentially arranged from top to bottom. According to the sealed pressure feed type horizontal directional drilling engineering geological survey continuous coring device, guiding and coring are combined, the direction can be accurately controlled, and efficient coring can further be achieved.

Description

technical field [0001] The invention relates to a sealed pressure-feeding horizontal directional drilling continuous coring device for engineering geological survey, which belongs to the technical field of engineering geological survey. Background technique [0002] Wireline core drilling is an advanced core drilling process. It uses a large-diameter drill pipe and a core tube is installed inside the drill tool. During the drilling process, the core is slowly installed in the core tube. When the second shot is finished and the core is filled with the core tube, use a fisher with a rope to lift the core tube from the drill pipe. After extracting the core, put the core tube from the drill pipe to the bottom of the hole. , continue to drill. Compared with ordinary drilling and coring, wireline coring has the advantages of good drilling deflection control, high drilling efficiency, low engineering cost, high core recovery rate, and fewer accidents in the hole; especially in dri...

AI Technical Summary

Problems solved by technology

However, with the increase of large and long tunnel projects, the traditional vertical drilling survey method encounters great challenges, and its implementation is very difficult, and the stratum information obtained cannot meet the needs of engineering design. Exploration technology can solve the deficiencies in the vertical drilling survey method, but it cannot take coring, so it cannot be applied to geological survey work

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