Coiled tubing steel strip butt joint process and raw material thickening equipment applied in butt joint process

Abstract

The invention discloses a coiled tubing steel strip butt joint process, and belongs to the technical field of coiled tubing machining and manufacturing. The coiled tubing steel strip butt joint process comprises the following steps that S1, the end parts of coiled tubing steel strip joints are cleaned, and dirt, impurities and burrs are removed; S2, the end parts of the coiled tubing steel strip joints are subjected to the wall thickness increasing treatment by using an end face hammering mode; S3, the end parts of the two coiled tubing steel strip joints to be subjected to butt joint are trimmed to be orderly, then are tightly abutted and aligned, and are welded firmly and reliably by using a plasma welder; and S4, the welded junction part is finished, and welding burrs and overlaps are removed through grinding. According to the butt joint process, the edge burning and excessive penetration conditions in the welding process can be effectively reduced, the thickness of the wall of thewelding area after finishing and grinding is prevented from being reduced, and the welding quality of the steel strip butt joint is improved. The invention further discloses steel strip butt joint rawmaterial thickening equipment used in the process for hammering and thickening the end parts of the coiled tubing steel strip joints.

Description

technical field [0001] The invention relates to the technical field of coiled tubing processing and manufacturing, in particular to a coiled tubing steel strip butt joint process and raw material thickening equipment. Background technique [0002] Coiled tubing operation technology is a new type of oil and gas field development and operation technology that has emerged in recent years. As the key equipment for realizing the above operation technology, coiled tubing technology determines the depth of wells that can be operated by coiled tubing operation technology. A coiled tubing manufacturing process is to use steel strips to be bent and welded into pipes. The length of steel strip raw materials is generally 300 to 900 meters. When making coiled tubing with a long length, it is often necessary to first butt two sections of steel strip raw materials Welded together for round pipe making. [0003] However, in the prior art, when the steel strips are butt-jointed and then wel...

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Problems solved by technology

[0003] However, in the prior art, when the steel strips are butt-jointed and welded, the oxidized burnt edges and welding collapses that are easy to occur during the welding process cannot be solved, and the welded burnt edges of the pipes will be caused by grinding and other means during finishing. The position becomes thinner, and because of the thinner here, it is prone to fatigue and breakage when it is bent during use

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