High-toughness outer flat drill rod

Abstract

The invention discloses a high-toughness outer flat drill rod. The high-toughness outer flat drill rod comprises a drill rod body, a sealing plate and water spraying grooves, wherein a hanging ring isfixed at the top of the drill rod body; a connecting pipe is arranged on the side surface of one end, close to the hanging ring, of the drill rod body; one end of the drill rod body extends into an oil well; drainage pipes are arranged at the two ends of the outer side, extending out of the ground, of the drill rod body; the sealing plate is arranged at the top position, close to a mine, of the outer side of the drill rod body; a through hole is formed in the sealing plate; a water inlet is formed in a nozzle; and the water spraying grooves are formed in one end of the side surface of the water inlet in a penetrating mode. A sand washing tool is provided with the water spraying grooves, high-pressure sand washing liquid is sprayed out from the water inlet of the nozzle to the outer sidesof the water spraying grooves, due to the fact that the water spraying grooves are distributed around the nozzle in an arc shape, the high-pressure sand washing liquid drives the nozzle to carry out reverse stress while being sprayed out, the nozzle rotates in a bearing, the rotating nozzle drives the water spraying grooves to spray out the sand washing liquid when rotating, so that sand on the inner wall of the mine can be completely separated conveniently.

Description

technical field [0001] The invention relates to the technical field of drilling tools, in particular to a high toughness outer flat drill pipe. Background technique [0002] During the mining process of the mine, the sand in the formation will enter the wellbore together with the oil and water. If the sand inside the wellbore cannot be cleaned in time, the sand will gradually precipitate, eventually leading to the blockage of the inner wall of the wellbore, reducing or stopping the production of the oil well. Currently In the construction of sand washing in oil wells, the sand washing liquid pump is often connected to the sand washing drill pipe body, the sand washing liquid is poured into the drill pipe body, and sprayed out from the lower end of the drill pipe, so that the sand on the inner wall of the oil well flows from the drill pipe body and The annular cavity between the inner walls of the oil well moves upward until the sand is discharged to the ground with the sand ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-toughness outer flat drill pipe to solve the problem that the nozzles of the sand-washing structure on the market proposed by the above-mentioned background technology are not easy to install, the sand-washing structure is easy to shake when installed in the mine, and the sand-washing structure has an impact on the inner wall of the well. Uneven issue with gravel wash

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