High/low-pressure sealed drill stem for hydraulic punching

Abstract

The invention discloses a high / low-pressure sealed drill stem for hydraulic punching. The high / low-pressure sealed drill stem comprises multiple sections of rod bodies with an internal hollow structure, wherein each rod body comprises a borehole section, and a connector and a connecting seat which are positioned at two ends of the borehole section; each connector comprises a tapered thread joint provided with a tapered thread on the outer wall and a sealing section I through which the tapered thread joint is connected to the borehole section; each connecting seat comprises a tapered thread seat provided with a tapered thread hole and a sealing section II matched with the sealing section I to realize sealing; each sealing section I comprises a groove formed in the rod body and a sealing ring arranged in the groove; each sealing section II is a smooth surface having smooth inner wall and is just in sealing fit with the sealing ring. According to the sealing sections, when high-pressure water is introduced, the joint between sections of the drill stem is tightly sealed without water leakage, and hydraulic pressure meeting the requirement of the drill bit is guaranteed.

Description

technical field [0001] The invention relates to a mining drilling device, in particular to a high and low pressure sealing drill pipe for hydraulic punching. Background technique [0002] In engineering geology and mineral drilling, drill pipes are widely used, especially in coal mining, in order to drain gas, holes need to be drilled, because the holes are relatively deep, so drill pipes are needed, but sometimes it is necessary to cool the drill bit to facilitate drilling The high-pressure water is the cooling water with a pressure of 1MPa-40MPa. The existing drill pipe often leaks at the joint, which not only makes the amount of water reaching the drill bit insufficient, but also reduces the water pressure, which affects the use. Contents of the invention [0003] The purpose of the present invention is to solve the problem that the existing drill pipe is easy to leak at the joint when it is fed with high-pressure cooling water, and to provide a high-low pressure seale...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing drill pipe is easy to leak at the joint when it is fed with high-pressure cooling water, and to provide a high-low pressure sealed drill pipe for hydraulic punching. The present invention is provided with a sealing section, which can ensure When the high-pressure water is injected, the joints between the sections of the drill pipe are tightly sealed and there will be no water leakage, which ensures the water pressure reaching the drill bit, and at the same time ensures that the cooling water reaches the drill bit smoothly, avoiding accidents caused by water leakage. At the same time, each section adopts Taper thread connection, easy to install, with a chip removal groove to make the chip removal more smooth

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