An eccentric ring type horizontal directional core drilling tool and its steering device

Abstract

The invention provides an eccentric ring type horizontal directional coring drilling tool steering device, which comprises a core outer tube and a core inner tube, the inner core tube is placed in the outer core tube, and the outer wall of the outer core tube is arranged There is an eccentric mechanism, and the eccentric mechanism includes inner and outer eccentric rings and a control motor. The present invention also provides an eccentric ring-type horizontal directional core drilling tool equipped with the above-mentioned steering device, which includes a shell, a shell clamping device, and an outer tube assembly and an inner tube assembly inside the shell. The pipe assembly is provided with a rope fishing device, a bullet mechanism, a single-action mechanism, a directional measuring device and a core inner pipe in sequence from left to right. The steering device provided by the present invention can realize the steering control of the core drilling tool, so that its axis can be precisely controlled; the core drilling tool provided by the present invention can be combined with the horizontal directional drilling machine to carry out various continuous deflection sections and horizontal sections. Coring.

Description

technical field [0001] The invention relates to an eccentric ring type horizontal directional core drilling tool and a steering device thereof, belonging to the technical field of geotechnical engineering investigation. Background technique [0002] Engineering drilling is a commonly used geological exploration method at present. It is a method used to further ascertain underground hidden geological phenomena and understand the spatial variation rules of geological phenomena after a preliminary understanding of the basic ground conditions through engineering geological surveying and mapping. Engineering drilling is also a method of exploration for the purpose of exploring mineral deposits, stratum structures, soil properties, etc., using a drilling rig to drill holes underground to take out soil or cores for analysis and research. The main purpose is to obtain cores and soil samples from the drill holes for physical properties Analyze to determine whether the foundation meet...

AI Technical Summary

Problems solved by technology

Although the traditional wireline core drilling tool can continuously take cores, it can only perform vertical hole coring drilling. Although the traditional directional drilling technology can accurately control the drilling axis through deflection, it cannot obtain cores.

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