Rope coring drilling tool suitable for large-caliber horizontal engineering geological exploration

Abstract

The invention discloses a rope coring drilling tool suitable for large-caliber horizontal engineering geological exploration. The rope coring drilling tool comprises an elastic clamping and positioning assembly and a salvaging and pushing device, wherein the salvaging and pushing device comprises a joint, a catching mechanism, and a pushing mechanism; the lower part of the joint is connected to the catching mechanism and the pushing mechanism; the pushing mechanism is located in the catching mechanism; the elastic clamping and positioning assembly comprises clamping jaws, a pressing sleeve, clamping jaw springs, a gland, a clamping jaw support, suspension rings and a pressing sleeve spring; the clamping jaws are articulated with the clamping jaw support; the gland is arranged on the upperpart of the clamping jaw support; the pressing sleeve is arranged in the inner hole of the clamping jaw support; flanges are arranged at the middle part of the side wall of the pressing sleeve and canbe in contact with the positioning surfaces of the clamping jaws; and the pressing sleeve spring is arranged between the pressing sleeve and the clamping claw support. The reliability of the large-caliber horizontal drilling rope coring drilling tool in the salvaging and recycling process and the centering effect in the transportation process can be improved while the structure is simplified; andthe abnormal abrasion of the drilling tool is reduced so as to meet the demand for the large-caliber horizontal drilling exploration in engineering geology.

Description

technical field [0001] The invention relates to a rope core drilling tool suitable for large-diameter horizontal engineering geological exploration. Background technique [0002] With the in-depth development of the national strategic super project Sichuan-Tibet Railway, engineering geological exploration has ushered in new challenges. The geological conditions of the Sichuan-Tibet Railway are complex and the construction risks are high. The existing equipment cannot adapt to the high-altitude geological conditions, resulting in low accuracy of comprehensive geophysical prospecting and geological prediction. Coring by horizontal drilling is a more intuitive geological detection method. Therefore, it is particularly necessary to carry out research on long-distance, large-diameter, and near-horizontal high-precision drilling tools to meet the geological prediction needs of the super-long tunnel construction of the Sichuan-Tibet Railway, ensure construction safety, and improve...

AI Technical Summary

Problems solved by technology

This way of collecting cards requires that there must be sufficient serial movement gap between the clip plate and the clip head in the outer tube assembly. When drilling in complex formations, the clip plate and the clip head are prone to jacking. , resulting in failure to receive cards smoothly, increasing the risk of stuck drill accidents

At present, the wireline core drilling tools for large-diameter near-horizontal engineering exploration are mainly based on enlarging the structural size on the premise of using the conventional tool structure. It has not yet fully utilized the advantages of wireline core drilling technology in large-diameter horizontal exploration. Decreased reliability and stability

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