Seamless steel tube for drill rod of precise coring drill

Abstract

The seamless steel pipe comprises an outer pipe, a wear-resisting layer is arranged on the surface of the outer pipe, an inner pipe is installed in an inner cavity of the outer pipe in an embedded mode, a reinforcing ring and pouring filler are installed in the middle of the outer wall of the inner pipe, reinforcing ribs are arranged in the pouring filler, and a limiting block, a groove and a thread are arranged at the position of an end opening of the inner pipe. A butt-joint sleeve is installed on the surface of an end opening of the inner pipe through threads, and a protruding block is installed on the inner wall of the butt-joint sleeve. The seamless steel pipe for the drill rod of the precise coring drill is used for forming a seamless steel pipe double-layer reinforcing structure, the problem that a traditional single layer is low in strength and prone to cracking, and consequently operation is sheltered is solved, the structural strength of the inner pipe is independently improved, and meanwhile the outer pipe is formed by the carbon-manganese seamless steel layer and the abrasion-resistant layer and used for improving the abrasion resistance of the outer wall of the outer pipe; the anti-explosion pipe is used for improving the anti-explosion performance and structural strength of the inner pipe, improving the compression resistance of the outer pipe, solidifying the inner pipe and the outer pipe, improving the structural strength of the whole pipeline and meanwhile avoiding the problems of corrosion softening, deformation, fragmentation and the like of external reinforcing ribs.

Description

technical field [0001] The invention relates to the technical field of steel pipes, in particular to a seamless steel pipe for precision core drilling rods. Background technique [0002] At present, in the process of geological drilling, coring is the process of sampling rocks in order to understand the geological conditions of the strata; seamless steel pipes and drill pipes are mainly used to obtain rock samples in oil and geological exploration drilling, It plays a pivotal role in exploration, but the existing seamless steel pipes have many defects in actual use, for example: after long-term use, the overall length of the reinforcing rib is long and easy to deform, resulting in weakening of the structural strength of the reinforcing rib, and the reinforcing rib The connection with the pipe body will form a connection seam. Under high fatigue use, the stress at the connection seam is large and easy to crack. Therefore, we improve this and propose a seamless steel pipe for...

AI Technical Summary

Problems solved by technology

[0002] At present, in the process of geological drilling, coring is the process of sampling rocks in order to understand the geological conditions of the strata; seamless steel pipes and drill pipes are mainly used to obtain rock samples in oil and geological exploration drilling, It plays a pivotal role in exploration, but the existing seamless steel pipes have many defects in actual use, for example: after long-term use, the overall length of the reinforcing rib is long and easy to deform, resulting in weakening of the structural strength of the reinforcing rib, and the reinforcing rib The connection with the pipe body will form a connection seam. Under high fatigue use, the stress at the connection seam is large and easy to crack

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