CN107747003A - A kind of high strength titanium alloy drilling rod and preparation method thereof - Google Patents

A kind of high strength titanium alloy drilling rod and preparation method thereof Download PDF

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Publication number
CN107747003A
CN107747003A CN201711144311.5A CN201711144311A CN107747003A CN 107747003 A CN107747003 A CN 107747003A CN 201711144311 A CN201711144311 A CN 201711144311A CN 107747003 A CN107747003 A CN 107747003A
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CN
China
Prior art keywords
drilling rod
titanium alloy
high strength
ingot
titanium
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CN201711144311.5A
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Chinese (zh)
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尹海鹏
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Individual
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Individual
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Priority to CN201711144311.5A priority Critical patent/CN107747003A/en
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C14/00—Alloys based on titanium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • C22C1/03—Making non-ferrous alloys by melting using master alloys

Abstract

The problem of a kind of high strength titanium alloy drilling rod and preparation method thereof, belongs to technical field of alloy, solves in Short Radius Horizontal Wells drillng operation, and drilling rod produces fatigue, abrasion and physical damage, include the component of following mass percent：Al：5.5 6.8%, V：3.5 4.5%, Fe≤0.3%, Si≤0.15%, C≤0.1%, N≤0.05%, H≤0.0125%, O≤0.2%, remainder Ti.By the compacting of consutrode, vacuum head consumable electric arc remelting, secondary remelting, the hammer cogging of alloy, after the rolling mill practice of finished product bar, finished product drilling rod is obtained.The drilling rod intensity of the present invention is high, wear-resistant.

Description

A kind of high strength titanium alloy drilling rod and preparation method thereof
Technical field
The invention belongs to technical field of alloy, and in particular to a kind of high strength titanium alloy drilling rod and preparation method thereof.
Background technology
In oil drilling, it can improve crude oil using Short Radius Horizontal Wells or old well sidetracking short radius horizontal well and adopt Yield, oil field development cost is reduced, extend the oil field development life-span, this is confirmed by drilling practice both domestic and external.Old well windowing The Short-radius Horizontal Sidetracking be using opened a window based on original straight well, sidetracking, deflecting, bore horizontal segment.It is horizontal in short radius In the drillng operation of well, the hole curvature radius of some Short Radius Horizontal Wells is less than 18m, and this can produce very big curved on drilling rod Transverse stress, these stress can make drilling rod produce fatigue, abrasion and physical damage, in particular by rotary steering technology rotary drill rod It is even more serious to carry out influence caused by deflecting drilling, has a strong impact on Life of drill rod, reliability.
The content of the invention
For the present invention to solve in Short Radius Horizontal Wells drillng operation, drilling rod produces asking for fatigue, abrasion and physical damage A kind of topic, there is provided high strength titanium alloy drilling rod and preparation method thereof.
The present invention adopts the following technical scheme that：
A kind of high strength titanium alloy drilling rod, include the component of following mass percent：Al：5.5-6.8%, V：3.5-4.5%, Fe≤ 0.3%, Si≤0.15%, C≤0.1%, N≤0.05%, H≤0.0125%, O≤0.2%, remainder Ti.
The Ti selects titanium sponge, particle diameter 1-50mm, including following mass fraction component：Ti >=99.55%, Fe≤ 0.15%, Si≤0.04%, Cl≤0.08%, C≤0.04%, N≤0.04%, O≤0.1%.
The V is with Al-V intermediate alloys, composition 50%Al-50%V.
The grade of the Al is A00, composition Al >=99.7%, and car is made as 2 × 10 × 20mm aluminium skimmings.
A kind of preparation method of high strength titanium alloy drilling rod comprises the following steps：
The first step, the preparation of material, 1-50mm titanium sponge is processed into 1-30mm in jaw crusher, in an oven 100- 150 DEG C of baking 2-3h, after baking, barrelling is sealed；
Second step, the compacting of consutrode, design size are 190 φ × 350mm electrode, aluminium skimmings and titanium sponge are mixed equal It is even, take half to pour into mould, then the Al-V intermediate alloy bags wrapped with aluminium foil is horizontal positioned, finally by second half aluminium skimmings and sea The mixture of continuous titanium pours into, compressing under 1660t pressure, obtains titanium alloy electrode rod；
3rd step, vacuum head consumable electric arc remelting, the 150-200 DEG C of baking in electric dry oven by compressing titanium alloy electrode rod 2h, then vacuum continuously welds simultaneously directly starting the arc melting, 305 φ of crystallizer specification × 2200mm, melting electric current in stove 7.5KA, melt after titanium alloy ingot in stove vacuum cooled 2h；
4th step, second of remelting, the flat ingot of primary smelting ingot car are preced with, vacuum welding progress secondary remelting, the φ of crystallizer 406 in stove × 2400mm, melting electric current 9.5KA, voltage 30-32V, after melting, ingot is taken off in stove after vacuum cooled 2h；
5th step, the hammer cogging of alloy, it is through 3t pneumatic hammer coggings, heating process by the titanium ingot after de- ingot：800-850 DEG C of heating 2.5h, is heated to 1030-1050 DEG C, is incubated 1.5h, and forging divides 3-4 fire to carry out, and the reheating in furnace time is 47-60min, cogging Size is 90 sides, and each fiery final forging temperature is 830-850 DEG C；
6th step, finished product rolling bar, rolling temperature are 920-950 DEG C, high temperature shove charge, are incubated 1-2h, roll in 400mm milling trains Carry out, completed using water chestnut side-ellipse-circular hole series, trimmed size φ 45.
Beneficial effects of the present invention are as follows：
1. the formula of the present invention disclosure satisfy that the over-all properties requirement of drilling rod；
2. after vacuum consumable remelting twice, each composition is evenly；
3. preparation technology of the present invention is reasonable, simple possible；
4. bar prepared by the present invention is wear-resistant, life and reliability is extended.
Embodiment
A kind of high strength titanium alloy drilling rod, include the component of following mass percent：Al：5.5-6.8%, V：3.5-4.5%, Fe≤0.3%, Si≤0.15%, C≤0.1%, N≤0.05%, H≤0.0125%, O≤0.2%, remainder Ti.
The Ti selects titanium sponge, particle diameter 1-50mm, including following mass fraction component：Ti >=99.55%, Fe≤ 0.15%, Si≤0.04%, Cl≤0.08%, C≤0.04%, N≤0.04%, O≤0.1%.
The V is with Al-V intermediate alloys, composition 50%Al-50%V.
The grade of the Al is A00, composition Al >=99.7%, and car is made as 2 × 10 × 20mm aluminium skimmings.
A kind of preparation method of high strength titanium alloy drilling rod comprises the following steps：
The first step, the preparation of material, 1-50mm titanium sponge is processed into 1-30mm in jaw crusher, in an oven 100- 150 DEG C of baking 2-3h, after baking, barrelling is sealed；
Second step, the compacting of consutrode, design size are 190 φ × 350mm electrode, aluminium skimmings and titanium sponge are mixed equal It is even, take half to pour into mould, then the Al-V intermediate alloy bags wrapped with aluminium foil is horizontal positioned, finally by second half aluminium skimmings and sea The mixture of continuous titanium pours into, compressing under 1660t pressure, obtains titanium alloy electrode rod；
3rd step, vacuum head consumable electric arc remelting, the 150-200 DEG C of baking in electric dry oven by compressing titanium alloy electrode rod 2h, then vacuum continuously welds simultaneously directly starting the arc melting, 305 φ of crystallizer specification × 2200mm, melting electric current in stove 7.5KA, melt after titanium alloy ingot in stove vacuum cooled 2h；
4th step, second of remelting, the flat ingot of primary smelting ingot car are preced with, vacuum welding progress secondary remelting, the φ of crystallizer 406 in stove × 2400mm, melting electric current 9.5KA, voltage 30-32V, after melting, ingot is taken off in stove after vacuum cooled 2h；
5th step, the hammer cogging of alloy, it is through 3t pneumatic hammer coggings, heating process by the titanium ingot after de- ingot：800-850 DEG C of heating 2.5h, is heated to 1030-1050 DEG C, is incubated 1.5h, and forging divides 3-4 fire to carry out, and the reheating in furnace time is 47-60min, cogging Size is 90 sides, and each fiery final forging temperature is 830-850 DEG C；
6th step, finished product rolling bar, rolling temperature are 920-950 DEG C, high temperature shove charge, are incubated 1-2h, roll in 400mm milling trains Carry out, completed using water chestnut side-ellipse-circular hole series, trimmed size φ 45.
Mechanical performance detection is carried out to the bar of the present invention：
（1）Normal temperature mechanical property, through 700 DEG C, 2h is heat-treated sample.
After after tested, the properties of sample are as follows：
σb：1041.5-1051.3MPa σ0.2：973.8-985.6MPa, δ5:13-19%, ψ：41-47.02%, ak：402-412KJ/ m2, HB（d）：3.5-3.653mm.
（2）400 DEG C of mechanical performances, through 700 DEG C, 2h is heat-treated sample.
σb：637.5-647.3MPa, δ5:14-15%, ψ：43-45%, σ100＞ 568.8MPa.
（3）Micro test
Isometric primary alpha phase content in microscopic structure is 40%.
（4）Macroscopic examination
Be visible by naked eyes crystal grain, crackle, be mingled with, be segregated, shrinkage cavity, it is loose the defects of.

Claims (5)

  1. A kind of 1. high strength titanium alloy drilling rod, it is characterised in that：Include the component of following mass percent：Al：5.5-6.8%, V： 3.5-4.5%, Fe≤0.3%, Si≤0.15%, C≤0.1%, N≤0.05%, H≤0.0125%, O≤0.2%, remainder Ti.
  2. A kind of 2. high strength titanium alloy drilling rod according to claim 1, it is characterised in that：The Ti selects titanium sponge, grain Footpath is 1-50mm, including following mass fraction component：Ti >=99.55%, Fe≤0.15%, Si≤0.04%, Cl≤0.08%, C≤ 0.04%, N≤0.04%, O≤0.1%.
  3. A kind of 3. high strength titanium alloy drilling rod according to claim 1, it is characterised in that：The V with Al-V intermediate alloys, Composition is 50%Al-50%V.
  4. A kind of 4. high strength titanium alloy drilling rod according to claim 1, it is characterised in that：The grade of the Al is A00, into Divide Al >=99.7%, car is made as 2 × 10 × 20mm aluminium skimmings.
  5. A kind of a kind of 5. preparation method of high strength titanium alloy drilling rod as claimed in claim 1, it is characterised in that：Including as follows Step：
    The first step, the preparation of material, 1-50mm titanium sponge is processed into 1-30mm in jaw crusher, in an oven 100- 150 DEG C of baking 2-3h, after baking, barrelling is sealed；
    Second step, the compacting of consutrode, design size are 190 φ × 350mm electrode, aluminium skimmings and titanium sponge are mixed equal It is even, take half to pour into mould, then the Al-V intermediate alloy bags wrapped with aluminium foil is horizontal positioned, finally by second half aluminium skimmings and sea The mixture of continuous titanium pours into, compressing under 1660t pressure, obtains titanium alloy electrode rod；
    3rd step, vacuum head consumable electric arc remelting, the 150-200 DEG C of baking in electric dry oven by compressing titanium alloy electrode rod 2h, then vacuum continuously welds simultaneously directly starting the arc melting, 305 φ of crystallizer specification × 2200mm, melting electric current in stove 7.5KA, melt after titanium alloy ingot in stove vacuum cooled 2h；
    4th step, second of remelting, the flat ingot of primary smelting ingot car are preced with, vacuum welding progress secondary remelting, the φ of crystallizer 406 in stove × 2400mm, melting electric current 9.5KA, voltage 30-32V, after melting, ingot is taken off in stove after vacuum cooled 2h；
    5th step, the hammer cogging of alloy, it is through 3t pneumatic hammer coggings, heating process by the titanium ingot after de- ingot：800-850 DEG C of heating 2.5h, is heated to 1030-1050 DEG C, is incubated 1.5h, and forging divides 3-4 fire to carry out, and the reheating in furnace time is 47-60min, cogging Size is 90 sides, and each fiery final forging temperature is 830-850 DEG C；
    6th step, finished product rolling bar, rolling temperature are 920-950 DEG C, high temperature shove charge, are incubated 1-2h, roll in 400mm milling trains Carry out, completed using water chestnut side-ellipse-circular hole series, trimmed size φ 45.
CN201711144311.5A 2017-11-17 2017-11-17 A kind of high strength titanium alloy drilling rod and preparation method thereof Pending CN107747003A (en)

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Application Number Priority Date Filing Date Title
CN201711144311.5A CN107747003A (en) 2017-11-17 2017-11-17 A kind of high strength titanium alloy drilling rod and preparation method thereof

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111471891A (en) * 2020-04-30 2020-07-31 中国石油天然气集团有限公司 720 MPa-grade high-strength corrosion-resistant titanium alloy pipe for drill rod and manufacturing method thereof
CN111621669A (en) * 2020-04-30 2020-09-04 中国石油天然气集团有限公司 Pipe for 720 MPa-grade high-strength titanium alloy drill rod and manufacturing method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB808270A (en) * 1956-09-05 1959-01-28 Union Carbide Corp Improvements in and relating to titanium-base alloys
CN1653199A (en) * 2002-05-09 2005-08-10 钛金属公司 Alpha-beta Ti-Al-V-Mo-Fe alloy
CN101148718A (en) * 2006-09-18 2008-03-26 辽宁峰阁钛业有限公司 High-strength high-toughness titanium alloy
CN102181746A (en) * 2011-04-21 2011-09-14 辽宁峰阁钛业集团有限公司 High-temperature-resistant titanium alloy
CN102477502A (en) * 2010-11-30 2012-05-30 西安赛特金属材料开发有限公司 Medical high-strength titanium alloy wire and preparation method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB808270A (en) * 1956-09-05 1959-01-28 Union Carbide Corp Improvements in and relating to titanium-base alloys
CN1653199A (en) * 2002-05-09 2005-08-10 钛金属公司 Alpha-beta Ti-Al-V-Mo-Fe alloy
CN101148718A (en) * 2006-09-18 2008-03-26 辽宁峰阁钛业有限公司 High-strength high-toughness titanium alloy
CN102477502A (en) * 2010-11-30 2012-05-30 西安赛特金属材料开发有限公司 Medical high-strength titanium alloy wire and preparation method thereof
CN102181746A (en) * 2011-04-21 2011-09-14 辽宁峰阁钛业集团有限公司 High-temperature-resistant titanium alloy

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111471891A (en) * 2020-04-30 2020-07-31 中国石油天然气集团有限公司 720 MPa-grade high-strength corrosion-resistant titanium alloy pipe for drill rod and manufacturing method thereof
CN111621669A (en) * 2020-04-30 2020-09-04 中国石油天然气集团有限公司 Pipe for 720 MPa-grade high-strength titanium alloy drill rod and manufacturing method thereof
CN111471891B (en) * 2020-04-30 2022-07-05 中国石油天然气集团有限公司 720 MPa-grade high-strength corrosion-resistant titanium alloy pipe for drill rod and manufacturing method thereof

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Application publication date: 20180302