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A drill pipe wear-resistant band flux-cored welding wire and its manufacturing method

A technology of a flux-cored welding wire and a manufacturing method, which is applied in the field of drilling, can solve the problems of drill pipe wear and influence on oil production, and achieves the effect of improving the service life and improving the anti-wear effect.

Active Publication Date: 2016-12-14
XINJIANG GRAND OILFIELD TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can protect the drill pipe joint, it will cause great wear and tear on the drill pipe, and may even affect the later oil recovery work

Method used

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  • A drill pipe wear-resistant band flux-cored welding wire and its manufacturing method
  • A drill pipe wear-resistant band flux-cored welding wire and its manufacturing method
  • A drill pipe wear-resistant band flux-cored welding wire and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Roll the 15×0.4 (width 15mm, thickness 0.4mm) H08A cold-rolled steel strip into a U shape;

[0029] 2) Get 1.6 kg of chromium Cr powder, 0.4 kg of boron B, 0.04 kg of molybdenum Mo, 0.2 kg of nickel Ni, 0.06 kg of carbon C, and 16.84 kg of iron powder Fe, and fully mix them after passing through a 60-mesh sieve respectively; Mix in the powder mixer for 10 minutes to obtain the drug core powder;

[0030] 3) Add the drug core powder into the U-shaped H08A cold-rolled steel strip groove, the filling rate is 27% (that is, add powder to 27% of the space in the U-shaped groove), close the U-shaped groove, and wrap the drug powder in it , and then through drawing dies with diameters of 4.0mm, 3.0mm, 2.6mm, 2.4mm, 2.2mm, 2.0mm, 1.8mm, and 1.6mm, drawing and reducing the diameter one by one, and finally making the diameter reach 1.6mm. A drill pipe wear-resistant band flux-cored welding wire is obtained.

Embodiment 2

[0032] 1) Roll the 15×0.4 (width 15mm, thickness 0.4mm) H08A cold-rolled steel strip into a U shape;

[0033] 2) Take 1.66 kg of chromium powder, 0.48 kg of boron, 0.1 kg of molybdenum, 0.26 kg of nickel, 0.1 kg of carbon, and 17.4 kg of iron powder, pass through a 60-mesh sieve respectively, and mix in a powder mixer for 10 minutes to obtain the drug core powder;

[0034] 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: 4.0mm, 3.0mm, 2.6mm, 2.4mm, 2.2mm, 2.0mm, 1.8mm, 1.6mm wire drawing dies are drawn and reduced one by one, and finally the diameter reaches 1.6mm to obtain a drill pipe wear-resistant flux cored wire.

Embodiment 3

[0036] 1) Roll the 15×0.4 (width 15mm, thickness 0.4mm) H08A cold-rolled steel strip into a U shape;

[0037] 2) Get 1.76 kg of chromium powder, 0.56 kg of boron, 0.16 kg of molybdenum, 0.36 kg of nickel, 0.16 kg of carbon, and 17 kg of iron powder, pass through a 60-mesh sieve respectively, mix in a powder mixer for 10 minutes, and obtain the drug core powder;

[0038] 3) Put the drug core powder into the U-shaped H08A cold-rolled steel strip groove, the filling rate is 30wt%, close the U-shaped groove, wrap the drug powder in it, and then pass through the grooves with diameters: 4.0mm, 3.0mm, 2.6mm, 2.4mm, 2.2mm, 2.0mm, 1.8mm, 1.6mm wire drawing dies are drawn and reduced one by one, and finally the diameter reaches 1.6mm to obtain a drill pipe wear-resistant flux cored wire.

[0039]

[0040] Table 1

[0041] A drill pipe wear-resistant band flux-cored welding wire prepared in Examples 1, 2, and 3 was respectively surfacing welded on 40CrMo steel with a specification of...

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Abstract

The present invention provides a flux-cored welding wire with wear-resistant band for drill pipe, which is composed of the following raw materials in mass percentage: chromium: 8-9%, boron: 2-3%, molybdenum: 0.2-1%, nickel: 1-2% , carbon: 0.3 to 0.8%, and the balance is iron. The present invention also proposes a method for manufacturing the aforementioned drill pipe wear-resistant banding flux-cored wire, comprising: step 1, fully mixing the powders of chromium, boron, molybdenum, nickel, carbon, and iron through a 60-mesh sieve; step 2 . Add the raw materials obtained in step 1 into the welding wire sheath and seal it. The drill pipe wear-resistant band flux-cored welding wire and the manufacturing method of the embodiment of the present invention can have a better anti-wear effect than the existing welding wire, and improve the service life of the equipment.

Description

technical field [0001] The invention relates to the field of drilling, in particular to a drill pipe wear-resistant band flux-cored welding wire and a manufacturing method. Background technique [0002] In the field of drilling, it is usually necessary to fix the drill bit on the drill pipe through the drill pipe joint for drilling. However, during the drilling process, friction will occur between the drill bit, the drill pipe joint and the drill pipe, which will reduce the service life of the drill pipe joint and the drill pipe. [0003] In order to avoid wear, it is usually necessary to weld a wear-resistant layer on the surface of the drill pipe joint, such as welding several wear-resistant strips made of tungsten carbide powder or iron-based powder to protect the drill pipe joint. Although this method can protect the drill pipe joint, it will cause great wear and tear to the drill pipe, and may even affect the oil recovery work in the later stage. Contents of the inve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/40
Inventor 杨军袁欣杨佰超
Owner XINJIANG GRAND OILFIELD TECH
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