Section connecting structure for drill rod of rotary drilling rig

Abstract

The invention relates to a section connecting structure for a drill rod of a rotary drilling rig. The section connecting structure comprises the drill rod, a core rod and drive rods. An inner key in the length direction is arranged in each drive rod. Strip-shaped outer keys with the length equal to that of the drill rod are arranged outside the drill rod and the outer edge of the core rod in the length direction. A plurality of pressure-bearing parts are arranged on the outer side of each drill rod section. The drill rod is divided into a plurality of sections according to the pressure-bearing parts of all the drill rod sections, and the drill rod sections are connected through arranged joint structures. According to the section connecting structure, the drill rod is divided into the plurality of sections according to the pressure-bearing parts, every two drill rod sections are connected through one joint structure, the drill rod is stressed more uniformly, and the coaxiality and the straightness of the drill rod are ensured; in the stressing process, the joint structures have bending-resistant and torsion-resistant effects, the fatigue degree of the drill rod in the using process is reduced, and the drill rod is beneficial for selecting steel tubes.

Description

technical field [0001] The invention relates to a drill rod of a rotary drilling rig, and specifically designs a segmented connection structure of the drill rod of a rotary drilling rig. Background technique [0002] The rotary drilling rig is mainly divided into three parts: the chassis part, the drill pipe part, and the drill bit and tooth part. Some functions of the chassis: the mechanical energy of the engine is converted into hydraulic energy through the hydraulic pump, and the hydraulic energy is transmitted to the power head motor on demand through the control of the distribution valve, and then converted into mechanical energy through the motor, and then through the reducer and the power head gearbox and internal Key sleeve, passed to the drill pipe section. [0003] The function of the drill pipe part: the drill pipe is to transfer the mechanical energy of the chassis of the rotary drilling rig to the next section of drill pipe and drill pipe drive pipe through eac...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a segmented connection structure of the drill pipe of the rotary drilling rig to overcome that in the prior art, each section of the drill pipe is a whole rod. Distortion and deformation, the coaxiality and straightness of the drill pipe cannot be guaranteed, the drill pipe is seriously damaged, and it is not conducive to the defect of the material selection of the drill pipe

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