Hemispherical drill stem for rotary drilling rig

Abstract

The invention discloses a hemispherical drill stem for a rotary drilling rig. The hemispherical drill stem comprises a cylindrical drill stem body, wherein the upper end of the drill stem body is provided with a shock absorbing ring; the top of the shock absorbing ring is provided with a flat head; the drill stem body is provided with a guide driving groove; the lower end of the drill stem body is provided with a spherical hinge joint; the front end of the drill stem body between the guide driving groove and the spherical hinge joint is provided with a compression spring; the spherical hinge joint is provided with a connecting lock hole; the end part where the cylindrical drill stem body is hinged with a drilling jig is hemispherical; and the spherical hinge joint is provided with a hingehole for fixing and transferring power provided by a power head along the diameter direction of the spherical hinge joint. By connecting the spherical hinge joint with the drilling jig, the drill stem has the advantages of more uniform stress between the drill stem and the drilling jig, more stable connection and capability of reducing the incidence rate of damaging equipment due to abrupt failure of the hinge joint of the drill stem during the construction.

Description

technical field [0001] The invention relates to a rotary drilling rig drill rod, in particular to a rotary drilling rig drill rod with a hemispherical front end. Background technique [0002] In the process of modern engineering construction, more and more rotary drilling rigs are used, especially in the construction and municipal fields, and the drill pipe is an important part of the rotary drilling rig. However, the connection between the drill pipe and the drilling tool of the traditional rotary drilling rig is usually connected by the square head and the drilling tool through a hinge. Due to the singularity of the square head structure of the drill pipe, this connection method is prone to stress concentration, especially the stress concentration The corner points are often prone to accelerated corrosion due to physical and chemical reactions. Among the components of the existing rotary drilling rig, the drill pipe is one of the most easily damaged parts. The failure of ...

AI Technical Summary

Problems solved by technology

However, the connection between the drill pipe and the drilling tool of the traditional rotary drilling rig is usually connected by the square head and the drilling tool through a hinge. Due to the singularity of the square head structure of the drill pipe, this connection method is prone to stress concentration, especially the stress concentration The corners are often prone to accelerated corrosion due to physical and chemical reactions

Among the components of the existing rotary drilling rig, the drill pipe is one of the most easily damaged parts. The failure of the joint between the drill pipe and the drilling tool will not only delay the working hours, but may also indirectly damage the power head and the drilling tool in severe cases, causing serious damage to the construction site. bring a lot of inconvenience

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