Pressure-feed information-reporting type continuous coring device for horizontal directional drilling engineering geological survey

Abstract

The invention relates to a pressure-feed information-reporting type continuous coring device for horizontal directional drilling engineering geological survey. According to the device, a drilling toolpressure feed and in-place information reporting mechanism, an elastic clamp positioning mechanism, a rock core blockage alarming mechanism, a guide mechanism and other mechanisms are additionally arranged in a traditional drilling tool assembly, and a rock core clamping and taking mechanism is placed in a mud pressure feed mode, so that the efficiency is greatly improved; when the drilling toolpressure feed and in-place informing mechanism is pressed by mud, a top edge is abutted against a spring bottom plate so as to promote a spring to be compressed, additionally, a top cap is promoted torise relatively so as to form a mud passage, mud pressure is reduced instantaneously, and the in-place informing function is achieved; and upward thrust can be generated by the rock core blockage alarming mechanism when a rock core is blocked or the rock core is filled with a rock core pipe, so that a sliding sleeve is driven to move upwards, a water gap is completely covered, the pressure of a closed cavity in which the sliding sleeve is located is increased, and the blockage alarming effect is achieved. According to the device, guiding and coring are combined, and accurate direction controland efficient coring can be achieved.

Description

technical field [0001] The invention relates to a continuous coring device for horizontal directional drilling engineering geological survey of pressure-feeding and reporting type, and 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; espe...

AI Technical Summary

Problems solved by technology

[0003] The traditional vertical hole geological drilling device is composed of a drilling tool assembly and a coring and fishing assembly. The core drilling tool drills the core at the core point, and then estimates the geological section along the line through the connection method. Since this device can only obtain cores spaced along the axis, the device cannot truly and comprehensively reflect the surrounding rock of the tunnel In addition, special occasions such as sea level, densely built areas on the surface, and dip-slip areas are complex, and it is difficult to implement when using vertical holes to explore geological conditions.

Moreover, although the current horizontal directional drilling technology can accurately guide and control the direction, it is not equipped with a coring and salvage assembly, so that the core cannot be obtained.

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