Processing technique for integral drill rod

Abstract

The invention relates to a processing technique of an integral-typed drill pipe; wherein, a drill pipe sub and a drill pipe tube body of the integral-typed drill pipe are directly connected by a male button and a female button; a thickening structure of the drill pipe tube body and outer wall and inner wall of the drill pipe sub are integral-typed thickening structure; the invention has the processing technique that male button end carries out medium frequency heating, upsetting and thickening and buffing at twice and then carries out the medium frequency heating and the upsetting and thickening again at twice; work pieces are turned around, and after female button end carries out the medium frequency heating, the upsetting and thickening and the buffing at twice and then carries out the medium frequency heating and the upsetting and thickening and buffing again, threads are processed. The drill pipe and the sub do not need friction welding or subsequent welding related treatment, which simplifies the processing technique, reduces cost of processing equipments; the drill pipe sub and the drill pipe tube body of the integral-typed drill pipe are directly connected by the male button and the female button, which ensures air tightness and strength of connection and at the same time correspondingly reduces outside dimension of the drill pipe sub and improves property of the drill pipe; the product of the drill pipe has the advantages of good quality, long service life and being safe and reliable.

Description

technical field [0001] The invention relates to a processing technology of a drilling rod for exploration and development, in particular to a processing technology of an integral drilling rod. Background technique [0002] Drill pipe is one of the main equipment in oil and gas field exploration and development engineering, and plays a vital role in oil drilling and production. As the depth of oil wells deepens, drilling becomes more and more difficult. Ordinary API drill pipes can no longer meet the needs of deep oil wells and ultra-deep oil wells. The oil industry calls for high strength, high torque, puncture resistance, and bending resistance. non-API drill pipe. At present, the common standard drill pipe connection process is to use the drill pipe and the joint to be processed separately, and then the drill pipe and the joint are friction welded, and then the weld is austenitized, high-pressure air blowing, high-temperature tempering of the weld, Weld seam finishing an...

AI Technical Summary

Problems solved by technology

As the depth of oil wells deepens, drilling becomes more and more difficult. Ordinary API drill pipes can no longer meet the needs of deep oil wells and ultra-deep oil wells. The oil industry calls for high strength, high torque, puncture resistance, and bending resistance. non-API drill pipe

At present, the common standard drill pipe connection process is to use the drill pipe and the joint to be processed separately, and then the drill pipe and the joint are friction welded, and then the weld is austenitized, high-pressure air blowing, high-temperature tempering of the weld, Weld seam finishing and other related treatments, the processing technology is more complicated, the processing equipment requirements are higher, and the structure of the welded part of the drill pipe and the joint is quite different from that of the base material, and the welded part becomes the weakest link in strength, which affects the strength of the drill pipe. service life, and may even cause accidents during drilling