Cone drill rod for cone drill rig

Abstract

The invention relates to the technical field of oil extraction, and discloses a cone drill rod for a cone drill rig. The cone drill rod comprises a rod body, a drill bit is fixedly connected with the lower end of the rod body, a blowing groove is formed in the middle part of the rod body, a protective sleeve is movably connected with the lower end of the drill bit, a first spring is fixedly connected with the lower end of the upper half section of the rod body, and the lower half section of the rod body is fixedly connected with the other end of the first spring. According to the cone drill rod for the cone drill rig, and by arranging a drill bit self-adjusting mechanism, when a drilling machine performs drilling work and soil is loose and soft, the underground can be rapidly drilled through the drill bit with a large opening; and when the drilling machine encounters a hard rock stratum, under the action that the downward feeding amount of the drill rod is not changed, the first spring is compressed inwards in a low amplitude, so that a piston rod moves downwards in a liquid pressing cavity and pushes filling liquid in the liquid pressing cavity downwards, an arc-shaped rod moves downwards under the hydraulic effect, the tip end of the drill bit gets close to the middle, and the drilling capacity of the drill bit to the hard rock stratum is enhanced.

Description

technical field [0001] The invention relates to the technical field of petroleum excavation, in particular to a roller cone drill rod for a roller cone drilling rig. Background technique [0002] The roller cone drilling rig is a kind of drilling equipment, which is mostly used in large open-pit mines. Over the past half a century, open-pit perforating equipment has experienced the development of "kowtow drill", fire-jet drill, and impact drill. Finally, the roller cone drill has become the perforating equipment commonly used in large and medium-sized open-pit mines due to its advantages of large drilling diameter and high perforation efficiency. . [0003] The traditional roller cone drill pipe is composed of a rod body, a drill bit, a ventilation groove and a connecting mechanism. When using a roller cone drill to perforate, due to the different degrees of firmness of the underground soil and rock formations, the drilling efficiency of the drill bit to the ground is diffe...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the use of the existing roller cone drill pipe proposed in the background technology, the present invention provides a roller cone drill pipe for a roller cone drilling machine, which has the advantages of self-adjustment of the drill bit and hole reinforcement, and solves the above-mentioned background technology. technical issues raised in

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