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Corrosion-resistant coating reinforced drill rod and preparation method thereof

A corrosion-resistant coating and drill pipe technology, applied in the field of drilling tools and drill pipes, can solve problems such as poor corrosion resistance, and achieve the effects of good corrosion resistance, reduced damage, and high corrosion resistance

Inactive Publication Date: 2019-10-08
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the object of the present invention is to provide a corrosion-resistant coating reinforced drill pipe and a preparation method thereof. The present invention solves the problems of water system operations and marine operations through the cold-spraying Fe-based amorphous alloy coating spraying process of the surface-enhanced drill pipe. The problem of poor corrosion resistance on the surface of drill pipes serving in the environment

Method used

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  • Corrosion-resistant coating reinforced drill rod and preparation method thereof
  • Corrosion-resistant coating reinforced drill rod and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Using vacuum melting high-pressure gas atomization powder making technology, put 95wt% pure nickel and 5wt% pure aluminum into the induction furnace, and after the metal is melted and refined, transfer the obtained melt into the heat preservation crucible for powder making The melt flows through the conduit and the nozzle and is atomized by the high-pressure gas flow to obtain 95Ni-5Al powder raw material.

[0054] Utilize the cold extrusion molding equipment with above-mentioned 95Ni-5Al raw material powder, extrude into wire by die, obtain the nickel-aluminum alloy wire material that the diameter that has obvious metallic luster is 3.0mm.

[0055] The raw material composition of Fe-based amorphous alloy powder is: Cr: 14wt%; Mo: 26wt%; B: 1.5wt%; Y: 4wt%; C: 4wt%;

[0056] The 45Mn2 alloy steel pipe is used as the base of the drill pipe, and it is deoxidized, degreased, derusted and roughened by sandblasting in sequence, using corundum with a particle size of 250-800 ...

Embodiment 2

[0066] Using vacuum melting high-pressure gas atomization powder making technology, put 95wt% pure nickel and 5wt% pure aluminum into the induction furnace, and after the metal is melted and refined, transfer the obtained melt into the heat preservation crucible for powder making The melt flows through the conduit and the nozzle and is atomized by the high-pressure gas flow to obtain 95Ni-5Al powder raw material.

[0067] Utilize the cold extrusion molding equipment with above-mentioned 95Ni-5Al raw material powder, extrude into wire by die, obtain the nickel-aluminum alloy wire material that the diameter that has obvious metallic luster is 3.0mm.

[0068] The composition of Fe-based amorphous alloy powder raw material is: Cr: 13wt%; Mo: 25wt%; B: 1.0wt%; Y: 3wt%; C: 3wt%;

[0069] The 45Mn2 alloy steel pipe is used as the base of the drill pipe, and it is deoxidized, degreased, derusted and roughened by sandblasting in sequence, using corundum with a particle size of 250-800 ...

Embodiment 3

[0077] Using vacuum melting high-pressure gas atomization powder making technology, put 95wt% pure nickel and 5wt% pure aluminum into the induction furnace, and after the metal is melted and refined, transfer the obtained melt into the heat preservation crucible for powder making The melt flows through the conduit and the nozzle and is atomized by the high-pressure gas flow to obtain 95Ni-5Al powder raw material.

[0078] Utilize the cold extrusion molding equipment with above-mentioned 95Ni-5Al raw material powder, extrude into wire by die, obtain the nickel-aluminum alloy wire material that the diameter that has obvious metallic luster is 3.0mm.

[0079] The raw material composition of Fe-based amorphous alloy powder is: Cr: 15wt%; Mo: 27wt%; B: 2.0wt%; Y: 5wt%; C: 5wt%;

[0080]The 45Mn2 alloy steel pipe is used as the base of the drill pipe, and it is deoxidized, degreased, derusted and roughened by sandblasting in sequence, using corundum with a particle size of 250-800 μ...

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Abstract

The invention provides a corrosion-resistant coating reinforced drill rod. The corrosion-resistant coating reinforced drill rod comprises a drill rod base body, a Ni-Al layer which is arranged on thesurface of the drill rod base body, and a Fe-based amorphous alloy coating arranged on the surface of the Ni-Al layer, wherein the Fe-based amorphous alloy coating comprises the following components of 13.0wt%-15.0wt% of Cr, 25.0wt%-27.0wt% of Mo, 1.0wt%-2.0wt% of B, 3.0wt%-5.0wt% of Y, 3.0wt%-5.0wt% of C and the balance Fe. According to the corrosion-resistant coating reinforced drill rod, the Fe-based amorphous alloy coating with the above components is adopted, and the amorphous alloy coating has no defects such as crystal boundary dislocation in common alloy. The Cr element in the corrosion-resistant coating reinforced drill rod has good pitting resistance, so that the corrosion resistance of the whole material is good. The invention also provides a preparation method of the corrosion-resistant coating reinforced drill rod.

Description

technical field [0001] The invention relates to the technical field of drilling tools and drill pipes, in particular to a method for preparing a corrosion-resistant coating reinforced drill pipe. Background technique [0002] The drill pipe is an important part of the drill string, which connects the surface equipment of the drilling rig and the bottom end of the drilling well, and plays the roles of applying drilling pressure, transmitting power, and transporting drilling fluid. In the drilling process of deep sea exploration and deep sea oil and gas exploitation, etc., the drill pipe has served in seawater and saline drilling fluid environment for a long time, and it will undergo chemical corrosion and electrochemical corrosion with the surrounding corrosive medium, resulting in corrosion pits and peeling layers on the surface, causing Stress concentration leads to severe corrosion fatigue damage, which reduces the overall drilling efficiency. Statistics show that the fai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/02C23C24/04C23C4/131C23C4/08E21B17/00C22C45/02C22C19/03
CPCC22C19/007C22C19/03C22C45/02C23C4/08C23C4/131C23C24/04C23C28/021C23C28/026E21B17/00
Inventor 康嘉杰岳文苏娟付志强朱丽娜佘丁顺王成彪梁健翁炜田斌黄飞
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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