Drilling rod machining process

Abstract

The invention discloses a drilling rod machining process and belongs to the field of machining and manufacturing of the drilling rods. The drilling rod machining process has the advantages that the stress of the drilling rods is conveniently removed, the quality of the drilling rods is improved and the service life is prolonged. The drilling rod machining process is characterized by comprising thefollowing steps: step one, preparing tubes and blanking; step two, removing rust of the tubes; step three, straightening the tubes; step four, drawing lines and marking the tubes; step five, preparing guide keys; step six, welding guide keys; step seven, coarsely knocking and removing stress; step eight, preparing clamping keys; step nine, welding the clamping keys; step ten, finely knocking andremoving stress; step eleven, straightening the tubes; step twelve, polishing; step thirteen, spraying paint; step fourteen, assembling; and step fifteen, checking. According to the drilling rod machining process, the quality of the drilling rods is improved by repeatedly knocking and removing stress; and the actual service life of the drilling rods can be prolonged.

Description

technical field [0001] The invention relates to the field of drill pipe processing and manufacturing, in particular to a drill pipe processing technology. Background technique [0002] The usual components of the drill string are: drill bit, drill collar, drill pipe, stabilizer, special joint and kelly; it is used on a large reaming rig, such as a crawler reaming rig disclosed on the patent network (application number: 201620469176.6), the drill pipe can be effectively stretched to increase the drilling depth of the drilling rig. The drill pipe is a steel pipe with a threaded tail, which is used to connect the surface equipment of the drilling rig and the drilling and grinding equipment or the bottom hole device at the bottom of the drilling well. The purpose of the drill pipe is to transport the drilling mud to the drill bit, and raise, lower or rotate the bottom hole device together with the drill bit. The drill pipe must be able to withstand huge internal and external pre...

AI Technical Summary

Problems solved by technology

[0004] However, after the clamping parts are welded, welding residual stress will be generated at the welding position, and the stress distribution is very irregular, and because the drill pipe will be subjected to large pressure and torsional force during the working process, the welding residual stress will greatly affect The structural strength of the drill pipe, the dimensional accuracy of the component processing, and the stability of the structure, and because the length of the drill pipe is very long, the cost of stress relief through heat treatment is very high, and the requirements for equipment are very large, so it is not suitable for use. And the remaining residual stress leads to the decline of the quality of the drill pipe, resulting in a decrease in the life of the drill pipe

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