Flux-cored wire with durable drill rod and high cracking resistance

A technology of flux-cored welding wire and wear-resistant band, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc. It can solve the problems of high crack resistance and high wear resistance that cannot be reasonably matched, and achieve crack resistance Combined with high wear resistance, less spatter, and longer service life

Inactive Publication Date: 2010-02-24
西安纳特石油技术有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a high-crack-resistant drill pipe hard-wearing flux-cored welding wire to overcome the problem that high crack resistance and high wear resistance cannot be reasonably matched in the prior art

Method used

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  • Flux-cored wire with durable drill rod and high cracking resistance
  • Flux-cored wire with durable drill rod and high cracking resistance

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Embodiment Construction

[0020] The present invention will be described in detail below by way of examples.

[0021] One, according to the requirements of the chemical composition of the deposited metal of the high-crack-resistant drill pipe wear-resistant band flux-cored wire of the present invention, select high-quality thin steel strips of appropriate specifications and related various metal powders and alloy powders to design the core of the flux-cored wire Powder formula, according to the formula, weigh various metal powders and alloy powders and mix them evenly to make core powder, and then unwind the thin steel strip on the flux-cored welding wire manufacturing equipment, tie it into a U shape, and add the core powder Flux-cored welding wire with a diameter of 1.6mm to 3.2mm is produced by powder, sealing into O-shape, rolling and reducing, drawing and reducing, and coiling into coils.

[0022] 2. The chemical composition of the deposited metal in each embodiment is shown in Table 1.

[0023] ...

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Abstract

The invention belongs to the field of welding material, particularly relates to a flux-cored wire with durable drill rod and high cracking resistance. For solving the problem of the prior art that thehigh cracking resistance can not reasonably fit to high wearing feature, the invention provides the flux-cored wire with durable drill rod and high cracking resistance, wherein the chemical composition of the weld metal consists of 1.5% to 3.5% of C, 8.0% to 18% of M, 1.5% to 2.5% of Cr, 2.0% to 3.0% of Mo, 0.5% to 1.5% of Si, 0.5% to 1.5% of Mn, 1.5% to 2.5% of B, and the remains are Fe. M is one or two of V and Nb. Compared to the prior art, the invention has the advantages of: 1 high cracking resistance and high wearing feature, 2 simple resurfacing welding technique, 3 high capability ofrepeating resurfacing welding, 4 good manufacturability of resurfacing welding, and 5 wide scope of application.

Description

Technical field: [0001] The invention belongs to the field of welding materials, in particular to a high-crack-resistant drill pipe wear-resistant band flux-cored welding wire. Background technique: [0002] In oil drilling engineering, with the development of ultra-deep wells, highly deviated wells, extended-reach wells and horizontal drilling technologies, the casing and The wear and tear problem of drill pipe is becoming more and more prominent, which may reduce the service life of drill pipe and the anti-collapse and internal pressure strength of the casing string, or cause the casing string to collapse, deform and leak, or even cause the entire well to be scrapped , thus greatly increasing the drilling cost. [0003] Overlay welding of new metal wear-resistant bands on oil drill pipe joints is one of the effective measures to reduce wear of drill pipes and casings. Flux-cored welding wire processed from alloy powder is widely used in new metal wear-resistant banding m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30
Inventor 李武韩勇
Owner 西安纳特石油技术有限责任公司
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