Method for achieving one-time molding of upset welding and wear-resistant welding of oil drill pipe

Abstract

The invention relates to a method for achieving one-time molding of upset welding and wear-resistant welding of an oil drill pipe. The oil drill pipe comprises a drill pipe body, and a male joint and a female joint arranged at both ends of the drill pipe body. The method comprises the steps as follows: firstly, the oil drill pipe is placed on a support device, the female joint extends out of a chuck, and a welding gun on a first welding device is aligned to the female joint to carry out upset welding until the thickness meets the requirement; then the oil drill pipe is turned around, the male joint of the oil drill pipe extends out of the chuck, the welding gun of the first welding device is aligned to the male joint, and the welding gun of the second welding device is aligned to the female joint; and finally, by rotating the oil drill pipe, the first welding device carries out upset welding on a solder wire at the male joint, the second welding device carries out wear-resistant welding on the solder wire at the female joint, and the welding is stopped when the outer diameter of the male joint meets the requirement, thereby finishing one-time molding work of upset welding and wear-resistant welding of the oil drill pipe. A device required by the method has the advantage of simple structure, short operation time, reduction in production cost and improvement on wear-resistant welding quality.

Description

technical field [0001] The invention relates to petroleum machinery, in particular to a process method for one-time forming of thickening welding and wear-resistant welding of two joints on petroleum drilling rods in petroleum machinery. Background technique [0002] For the exploration and extraction of oil, the most important and most used is the oil drill pipe in oil machinery. For an oil drill pipe, its structure mainly includes a drill pipe body and male joints and female joints respectively arranged at both ends of the drill pipe body. [0003] As we all know, during the drilling process, due to the continuous friction between the drill pipe and the well wall, the outer diameter of the drill pipe joint becomes smaller. Therefore, many drilling and oil extraction researchers are focusing on solving the drill pipe and wear problems. [0004] In the prior art, for the problem of friction loss of drill pipe, the following treatment methods are basically adopted t...

AI Technical Summary

Problems solved by technology

The above-mentioned prior art has the following deficiencies in the drill pipe wear resistance treatment process. The male joint and the female joint of the drill pipe need to be processed separately, which requires two operations, and the turning operation of the drill pipe must be realized in the middle; For grinding welding and thickening welding, if you need to turn around or change the position of the wear-resistant welding device during the operation, it will take a lot of time, causing the temperature of the welding part of the wear-resistant welding before thickening welding to drop, which affects the quality of thickening welding

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