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Sleeve-friendly wear-resistant strip flux-cored wire

A kind of flux-cored welding wire, friendly technology, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the loss of drill pipe protective sleeve wear, wear-resistant strip block peeling, damage to drilling equipment and other problems, to achieve the effect of good welding process performance, less dust generation, and reduced torque

Inactive Publication Date: 2009-09-09
BEIJING GABBARD ENG & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, many wear-resistant materials use various hard structures such as carbides as wear-resistant structures to protect drill pipes. However, practical applications and laboratory analysis have found that the size and distribution of carbides will affect the casing due to the huge torque the drill pipe bears. produce distinct wear
Coarse carbides and uneven distribution will cause "aggressive" wear on the casing, and the wear-resistant band itself is prone to strip-like peeling under torque and pressure, which will not only lose the protection of the drill pipe, but also aggravate the wear of the casing. wear, and its peeling weld strips may damage other drilling equipment

Method used

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  • Sleeve-friendly wear-resistant strip flux-cored wire
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  • Sleeve-friendly wear-resistant strip flux-cored wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Roll a 10×0.3 (width 10mm, thickness 0.3mm) H08A cold-rolled steel strip into a U shape;

[0028] 2) Take 1 kg of high-carbon ferrochrome powder, 0.8 kg of ferro-boron, 0.05 kg of ferro-molybdenum, 0.5 kg of nickel powder, 0.1 kg of low-carbon ferrosilicon, 0.2 kg of medium-carbon ferromanganese, and 7.35 kg of electrolytic iron powder, and pass through 60 meshes respectively After sieving, mix in a powder mixer for 10 minutes to obtain the drug core powder;

[0029] 3) Add the drug core powder into the U-shaped H08A cold-rolled steel strip groove, the filling rate is 37wt%, close the U-shaped groove, wrap the drug powder in it, and then pass through the grooves with diameters: 3.0mm, 2.8mm, 2.6mm, 2.4mm, 2.2mm, 2.0mm, 1.8mm, and 1.6mm wire drawing dies are drawn and reduced one by one, and finally the diameter reaches 1.6mm to obtain a casing-friendly hardbanding surfacing flux-cored wire.

Embodiment 2

[0031] 1) Roll a 10×0.3 (width 10mm, thickness 0.3mm) H08A cold-rolled steel strip into a U shape;

[0032] 2) Take 1.5 kg of high-carbon ferrochrome powder, 1.2 kg of ferro-boron, 0.15 kg of ferro-molybdenum, 0.7 kg of nickel powder, 0.15 kg of low-carbon ferrosilicon, 0.4 kg of medium-carbon ferromanganese, and 5.9 kg of electrolytic iron powder, and pass through 60 meshes respectively After sieving, mix in a powder mixer for 10 minutes to obtain the drug core powder;

[0033] 3) Put the drug core powder into the U-shaped H08A cold-rolled steel strip groove, the filling rate is 32wt%, close the U-shaped groove, wrap the drug powder in it, and then pass through the grooves with diameters: 3.0mm, 2.8mm, 2.6mm, 2.4mm, 2.2mm, 2.0mm, 1.8mm, and 1.6mm wire drawing dies are drawn and reduced one by one, and finally the diameter reaches 1.6mm to obtain a casing-friendly hardbanding surfacing flux-cored wire.

Embodiment 3

[0035] 1) Roll a 10×0.3 (width 10mm, thickness 0.3mm) H08A cold-rolled steel strip into a U shape;

[0036] 2) Take 2.1 kg of high-carbon ferrochrome powder, 1.2 kg of ferro-boron, 0.2 kg of ferro-molybdenum, 0.8 kg of nickel powder, 0.25 kg of low-carbon ferrosilicon, 0.7 kg of medium-carbon ferromanganese, and 4.75 kg of electrolytic iron powder, and pass through 60 meshes respectively After sieving, mix in a powder mixer for 10 minutes to obtain the drug core powder;

[0037] 3) Add the drug core powder into the U-shaped H08A cold-rolled steel strip groove, the filling rate is 28wt%, close the U-shaped groove, wrap the drug powder in it, and then pass through the grooves with diameters: 3.0mm, 2.8mm, 2.6mm, 2.4mm, 2.2mm, 2.0mm, 1.8mm, and 1.6mm wire drawing dies are drawn and reduced one by one, and finally the diameter reaches 1.6mm to obtain a casing-friendly hardbanding surfacing flux-cored wire.

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Abstract

A sleeve-friendly wear-resistant strip flux-cored wire belongs to the welding field of material processing project. The aim of the invention is to settle the problem of wearing on the sleeve by the wear-resistant strip. The sleeve-friendly wear-resistant strip flux-cored wire provided by the invention adopts steel strip for packaging the flux core powder which accounts for 22-37% of total weight of flux-cored wire. The flux core powder comprises the following substances by mass percent: 10-30% of high carbon ferro-chrome, 8-17% of ferroboron, 0.5-4% of ferromolybdenum, 5-10% of nickel powder, 1-3% of low carbon ferrosilicium, 2-8% of medium-carbon ferromanganese and the balance of electrolytic iron powder. The preparing method of the invention adopts the prior art. The sleeve-friendly wear-resistant strip flux-cored wire provided by the invention can effectively increase the using safety of wear-resistant strip, reduce the wearing on the sleeve and prolong the lifetime of drill pipe.

Description

technical field [0001] The invention belongs to the field of welding in material processing engineering, and in particular relates to a flux-cored welding wire suitable for wear-resistant bands of surfacing welding drill pipe joints and wear-resistant layers of equipment related to oil and gas exploration and drilling. Background technique [0002] As deep wells, ultra-deep wells, highly deviated wells, directional wells, extended-reach wells, and horizontal wells account for an increasing proportion of drilling, the wear of drill pipes and casings has become more and more prominent. The wear-resistant belt of the drill pipe joint has better wear resistance than the joint itself, and can reduce the wear of the casing at the same time. Therefore, the wear-resistant banding technology has been applied more and more in drilling, and has become one of the necessary technical conditions for bidders to win the bid when bidding for major international oil recovery projects. Intuit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/00B23K35/30B23K35/16B23K35/40
Inventor 赵学彬孙哲峰张发云周鑫蒋璟彦王建英刘景辉宋长东
Owner BEIJING GABBARD ENG & TECH
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