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A kind of graphene reinforced titanium alloy for 1200mpa grade titanium alloy drill pipe and its pipe material manufacturing method

A titanium alloy and graphene technology, which is applied in manufacturing tools, metal extrusion control equipment, metal extrusion, etc., can solve the problems of high processing performance requirements, complex production process, low specific strength, etc., and achieve corrosion resistance Good, simple process, high specific strength effect

Active Publication Date: 2021-01-01
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems in the prior art, the purpose of the present invention is to provide a kind of graphene-enhanced 1200MPa grade titanium alloy drill rod titanium alloy and its pipe material manufacturing method, to solve the existing titanium alloy drill pipe with complex production process and low processing performance. High requirements, high cost, low specific strength and other technical problems

Method used

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  • A kind of graphene reinforced titanium alloy for 1200mpa grade titanium alloy drill pipe and its pipe material manufacturing method
  • A kind of graphene reinforced titanium alloy for 1200mpa grade titanium alloy drill pipe and its pipe material manufacturing method

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Experimental program
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Effect test

Embodiment 1

[0028] 1. Ingredients: According to the composition of Ti-3.5wt% Fe-4.0wt% Al-0.02wt% Gr alloy, zero-grade sponge Ti, industrial pure iron, pure aluminum and graphene are prepared respectively; the purity of the metals is ≥99.99%.

[0029] 2. Melting: Vacuum suspension casting method is adopted. During smelting, control the vacuum degree in the furnace to ≤10 -2 Pa, the furnace temperature is 1600°C, and the alloy ingot is prepared. After sufficient cooling, peel the ingot to remove the outer oxide layer.

[0030] 3. Annealing treatment: Annealing treatment is carried out in a box-type resistance furnace, the annealing temperature is 970-990°C, the holding time is 1h, and air-cooled.

[0031] 4. Extrusion treatment: Extrusion temperature: 850-900°C, extrusion ratio greater than 16, extrusion speed 4-6mm / s; pipe pre-stretching deformation 3%, and finally finished.

Embodiment 2

[0033] 1. Ingredients: According to the composition of the Ti-3.5wt%Fe-4.5wt%Al-0.03wt%Gr alloy, zero-grade sponge Ti, industrial pure iron, pure aluminum and graphene are prepared respectively; the purity of the metals is ≥99.99%.

[0034] 2. Melting: Vacuum suspension casting method is adopted. During smelting, control the vacuum degree in the furnace to ≤10 -2 Pa, the furnace temperature is 1600°C, and the alloy ingot is prepared. After sufficient cooling, peel the ingot to remove the outer oxide layer.

[0035] 3. Annealing treatment: Annealing treatment is carried out in a box-type resistance furnace, the annealing temperature is 970-990°C, the holding time is 1h, and air-cooled.

[0036] 4. Extrusion treatment: Extrusion temperature: 850-900°C, extrusion ratio greater than 16, extrusion speed 4-6mm / s; pipe pre-stretching deformation 3%, and finally finished.

Embodiment 3

[0038] 1. Ingredients: According to the composition of Ti-3.5wt%Fe-5.0wt%Al-0.04wt%Gr alloy, zero-grade sponge Ti, industrial pure iron, pure aluminum and graphene are prepared respectively; the purity of the metals is ≥99.99%.

[0039] 2. Melting: Vacuum suspension casting method is adopted. During smelting, control the vacuum degree in the furnace to ≤10 -2 Pa, the furnace temperature is 1600°C, and the alloy ingot is prepared. After sufficient cooling, peel the ingot to remove the outer oxide layer.

[0040]3. Annealing treatment: Annealing treatment is carried out in a box-type resistance furnace, the annealing temperature is 970-990°C, the holding time is 1h, and air-cooled.

[0041] 4. Extrusion treatment: Extrusion temperature: 850-900°C, extrusion ratio greater than 16, extrusion speed 4-6mm / s; pipe pre-stretching deformation 3%, and finally finished.

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Abstract

The invention discloses a titanium alloy for a graphene reinforced 1200 MPa-grade titanium alloy drill rod and a pipe manufacturing method thereof. The titanium alloy comprises the following components in percentage by weight: 3.0-5.0% of Fe, 3.0-5.0% of Al, 0.02-0.05% of graphene, and the balance of titanium; pure iron, pure aluminum, titanium and graphene are smelted by adopting a vacuum suspension casting method to obtain a pipe blank; the pipe blank is heated for uniform annealing; the heated pipe blank is extruded by an extruder; and then, the pre-stretching deformation is performed. Thecomprehensive cost of the alloy is reduced by 25-30% compared with a traditional titanium alloy with the same performance indexes. The solid solution reinforcing effect of Fe and Al elements and the stabilizing effect on an alpha phase and a beta phase are fully used; a one-step direct deformation heat treatment (hot extrusion) process is adopted to improve the comprehensive performances of products; and a flexible extrusion production process can be adopted to improve the productivity and the yield.

Description

technical field [0001] The invention relates to the technical field of petroleum pipe manufacturing, in particular to a graphene-reinforced titanium alloy for 1200MPa grade titanium alloy drill pipe and a method for manufacturing the pipe. Background technique [0002] With the development of the petroleum industry, the number of deep wells, ultra-deep wells and horizontal wells is increasing, making exploration and development more difficult. The specific strength of traditional steel drill pipes is low, and failure accidents such as stress corrosion fracture, fatigue fracture, leakage, and overload that occur under complex oil and gas drilling and production conditions pose a great threat to the safe production of oil and gas wells. Titanium alloy drill pipe has high specific strength, good hydrogen sulfide stress corrosion resistance and corrosion fatigue resistance, which can significantly reduce the weight of the drill string, relieve stress concentration, improve the m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22C1/10B22D18/06C22F1/18C22C1/02B21C31/00
CPCB21C31/00B22D18/06C22C1/1036C22C14/00C22F1/183
Inventor 蒋龙冯春韩礼红刘永刚李方坡潘志勇朱丽娟路彩虹王航徐欣
Owner BC P INC CHINA NAT PETROLEUM CORP
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