CN112442613A - 105ksi titanium alloy pipe for petroleum drill pipe and manufacturing method thereof - Google Patents
105ksi titanium alloy pipe for petroleum drill pipe and manufacturing method thereof Download PDFInfo
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- CN112442613A CN112442613A CN202011240708.6A CN202011240708A CN112442613A CN 112442613 A CN112442613 A CN 112442613A CN 202011240708 A CN202011240708 A CN 202011240708A CN 112442613 A CN112442613 A CN 112442613A
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- pipe
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
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- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
Abstract
The invention discloses a 105ksi titanium alloy tubing for an oil drill pipe and a manufacturing method thereof, wherein the tubing mainly comprises Al, Mo, V, Zr and Ti, the tubing is subjected to physical mechanical property evaluation, the tensile strength Rm, the yield strength R0.2 and the elongation percentage A of the tubing are tested, a Charpy impact test (V-shaped notch, longitudinal direction and room temperature) is carried out to test the impact energy, and a metallographic microscope is used for observing a metallographic structure. The measured values can meet the requirements of mechanical properties of 105 ksi-level drill pipes, the invention fills the blank of manufacturing process of 105 ksi-level titanium alloy petroleum drill pipe bodies at home and abroad, and the operation steps are simple.
Description
Technical Field
The invention belongs to the field of drilling and production in the petroleum and natural gas industry, and particularly relates to a 105ksi titanium alloy pipe for a petroleum drill pipe and a manufacturing method thereof.
Background
With the development of the modern petroleum industry and the gradual increase of the demand of oil and gas resources at home and abroad, the exploration and development of petroleum and natural gas are promoted to be continuous and deep, the encountered exploitation environment and stratum conditions are more and more complex, and deep wells exceeding 7000m are more and more common; offshore drilling has also not been satisfactory in shallow sea, and is gradually advancing to deep water; on land, three-high (high temperature, high pressure, high corrosion) oil and gas wells which are difficult to be exploited in the past are also beginning to overcome. Although traditional steel drill pipe body materials such as 27CrMo and 30CrMo are still applied to oil fields in large quantities, the requirements of high-temperature, high-pressure and high-corrosion well materials cannot be met gradually as drilling and production environments become more and more severe, and many failure problems occur. The titanium alloy petroleum drill pipe has the excellent characteristics of small density, high specific strength, high temperature resistance, corrosion resistance and the like, and has wide application prospect for drilling problems of complex working conditions such as ultra-deep wells, extended reach wells, sulfur-containing wells, short radius wells, high temperature and high pressure wells and the like.
The titanium alloy oil drill pipe is in a research and development stage, and the extensive application of the titanium alloy pipe in the oil field is restricted mainly because expensive alloying elements such as V, Mo and Zr have large processing and manufacturing difficulty and high cost, and the heat treatment process of the mechanical property of a 105 ksi-grade drill pipe body meeting the requirements of the oil industry is not clear.
Disclosure of Invention
The invention aims to overcome the defects and provides a pipe for a 105ksi titanium alloy oil drill pipe and a manufacturing method thereof, which can meet the mechanical property of a 105 ksi-grade oil drill pipe body.
The invention is realized by the following technical scheme:
the 105ksi titanium alloy pipe for the petroleum drill pipe comprises, by mass, 4.9-5.3% of Al, 0.7-0.9% of Mo, 3.0-3.3% of V, 1.5-2% of Zr and the balance Ti.
A method for manufacturing a pipe for a 105ksi titanium alloy petroleum drill pipe comprises the following steps:
step 1, preparing raw materials according to the components of the pipe, and sequentially smelting and casting to obtain an ingot blank, wherein the components of the pipe comprise, by mass, 4.9-5.3% of Al, 0.7-0.9% of Mo, 3.0-3.3% of V, 1.5-2% of Zr, and the balance of Ti;
step 2, heating the ingot blank and then extruding;
step 3, rolling the extruded ingot blank;
step 4, coating protective paint on the surface of the rolled pipe;
step 5, carrying out solution treatment on the pipe coated with the protective coating;
and 6, carrying out aging treatment on the pipe subjected to the solution treatment to obtain the 105ksi titanium alloy pipe for the petroleum drill pipe.
Further, in the step 2, the ingot blank is extruded after being heated to 980-1050 ℃ and kept warm for 1 h.
Further, in the step 2, the extrusion ratio is more than 9 and the extrusion speed is 17mm/s during extrusion.
Further, in the step 3, the rolling temperature is 450 ℃ to 550 ℃.
Further, in step 4, the protective coating is Cr2O3。
Further, in the step 5, the tube is heated to 980-1050 ℃ and is kept warm for 45-60 min, and then air-cooled to room temperature to obtain the tube after the solution treatment.
And step six, aging treatment, namely heating the pipe subjected to the solution treatment to 550-650 ℃, preserving heat for 5-7 hours, and cooling in air to room temperature.
A105 ksi titanium alloy pipe for an oil drill pipe is obtained by a manufacturing method of the 105ksi titanium alloy pipe for the oil drill pipe.
Compared with the prior art, the invention has the following beneficial technical effects:
the components of the pipe body mainly comprise Al, Mo, V, Zr and Ti, wherein the Al mainly plays a role in solid solution strengthening, and the tensile strength at room temperature can be increased by 50MPa when every 1 percent of Al is added. However, when Al exceeds 6%, Ti is formed3Brittle phase of Al. Zr is a common neutral element, has higher solubility in both alpha titanium and beta titanium, is added with other elements simultaneously, has supplementary strengthening effect, has less adverse effect on plasticity than Al, and ensures that the alloy has good pressure processing performance and welding performanceAnd (4) connecting the performance. V and Mo are two elements which are the most widely applied in beta stable elements, have the solid solution strengthening effect on beta phase, reduce the phase transformation point and increase the hardenability of the alloy, thereby strengthening the heat treatment strengthening effect.
The mechanical property of the pipe material is evaluated, and the tensile strength Rm and the yield strength R of the pipe material are tested0.2And elongation A, a Charpy impact test (V-shaped notch, longitudinal direction and room temperature) is carried out to test the impact energy, and a metallographic microscope is used for observing a metallographic structure. The measured values can meet the requirements of mechanical properties of 105 ksi-level drill pipes, the invention fills the blank of manufacturing process of 105 ksi-level titanium alloy petroleum drill pipe bodies at home and abroad, and the operation steps are simple.
Drawings
FIG. 1 is a metallographic structure diagram of a pipe produced in example 1 of the present invention.
Detailed Description
The invention will now be further described with reference to the accompanying drawings and examples, which are given by way of illustration and not by way of limitation.
The invention relates to a method for manufacturing a pipe for a 105ksi titanium alloy petroleum drill pipe, which comprises the following steps:
step 1, preparing raw materials according to the components of the pipe, and sequentially smelting and casting to obtain an ingot blank, wherein the components of the pipe comprise, by mass, 4.9-5.3% of Al, 0.7-0.9% of Mo, 3.0-3.3% of V, 1.5-2% of Zr, and the balance of Ti;
step 2, heating the ingot blank to 980-1050 ℃, preserving heat for 1h, and then extruding, wherein the extrusion ratio is more than 9 and the extrusion speed is 17mm/s during extrusion;
step 3, rolling the extruded ingot blank at the rolling temperature of 450-550 ℃;
step 4, coating protective coating Cr on the surface of the rolled pipe2O3；
Step 5, carrying out solution treatment on the pipe coated with the protective coating; heating the pipe to 980-1050 ℃, preserving heat for 45-60 min, and air-cooling the pipe to room temperature to complete solid solution treatment;
step 6, carrying out aging treatment on the pipe subjected to the solution treatment; and (3) heating the pipe subjected to the solution treatment to 550-650 ℃, preserving the heat for 5-7 h, and cooling the pipe to room temperature in air to finish the manufacturing.
Example 1:
the titanium alloy oil drill pipe body provided by a certain company is adopted, and the specific components are Al: 5.1%, Mo: 0.8%, V: 3.2%, Zr: 1.7 percent and the balance of Ti, the unit is mass percent, and the heat treatment process comprises the following operation steps.
Step 1, preparing materials according to the component proportion, and smelting and casting the materials into round ingot blanks;
and 2, heating the ingot blank to 1000 ℃, preserving heat for 1h, and extruding at an extrusion ratio of more than 9 and an extrusion speed of 17 mm/s.
And 3, rolling the extruded titanium alloy petroleum pipe at the rolling temperature of 500 ℃.
Step 4, coating Cr on the surface of the pipe body of the titanium alloy petroleum drill pipe2O3A protective coating.
Step 5, carrying out solution treatment on the pipe coated with the protective coating; and (3) feeding the pipe body of the titanium alloy petroleum drill pipe into a heating furnace heated to 1000 ℃, preserving the heat for 60min, and cooling the pipe to room temperature in air to complete the solid solution treatment.
And 6, feeding the titanium alloy petroleum drill pipe body subjected to the solution treatment into a heating furnace heated to 600 ℃, preserving heat for 6 hours, taking out, and then cooling in air to room temperature.
The titanium alloy petroleum drill pipe after the manufacturing process is subjected to physical property test, and the mechanical properties are as follows: the mechanical properties of the material are as follows: tensile strength Rm920MPa, yield strength R0.2850MPa, elongation A of 15%, Charpy impact power (V-shaped notch, longitudinal direction, room temperature) of 45J, mechanical property of the titanium alloy petroleum drill pipe body after the manufacturing process meets the technical requirement of 105ksi steel grade petroleum, and tensile strength RmGreater than or equal to 793Mpa, yield strength R0.2724-931 Mpa, the elongation A is more than or equal to 12 percent, and the Charpy impact power (V-shaped, longitudinal and room temperature) is more than or equal to 40J. The metallographic structure of the titanium alloy drill pipe body after the manufacturing process is shown in figure 1 and is a lamellar structure, wherein the alpha phase content is 68.3 percent, and the average beta phase content isThe grain size is 160 um.
Example 2:
step 1, taking 4.9% of Al, 0.7% of Mo, 3.0% of V, 1.5% of Zr and the balance Ti according to mass percent, and preparing an ingot blank;
step 2, heating the ingot blank to 980 ℃, preserving heat for 1h, and then extruding, wherein the extrusion ratio is more than 9 and the extrusion speed is 17 mm/s;
step 3, rolling the extruded ingot blank at the rolling temperature of 450 ℃;
step 4, coating protective coating Cr on the surface of the rolled pipe2O3；
Step 5, carrying out solution treatment on the pipe coated with the protective coating; heating the pipe to 980 ℃, preserving the heat for 45min, and cooling the pipe to room temperature in air to complete the solid solution treatment;
step 6, carrying out aging treatment on the pipe subjected to the solution treatment; and (4) heating the pipe subjected to the solution treatment to 550 ℃, preserving the heat for 5 hours, and cooling the pipe to room temperature in air to finish the manufacture.
Example 3:
step 1, taking 5.3% of Al, 0.9% of Mo, 3.3% of V, 2% of Zr and the balance Ti according to mass percentage, and preparing an ingot blank;
step 2, heating the ingot blank to 1050 ℃, preserving heat for 1h, and then extruding, wherein the extrusion ratio is greater than 9 and the extrusion speed is 17mm/s during extrusion;
step 3, rolling the extruded ingot blank at the rolling temperature of 550 ℃;
step 4, coating protective coating Cr on the surface of the rolled pipe2O3；
Step 5, carrying out solution treatment on the pipe coated with the protective coating; heating the pipe to 1050 ℃, preserving the heat for 60min, and cooling the pipe to room temperature in air to complete the solid solution treatment;
step 6, carrying out aging treatment on the pipe subjected to the solution treatment; and (4) heating the pipe subjected to the solution treatment to 650 ℃, preserving the heat for 7 hours, and cooling the pipe to room temperature in air to finish the manufacture.
Example 4:
step 1, taking 5.1% of Al, 0.8% of Mo, 3.2% of V, 1.8% of Zr and the balance Ti according to mass percent, and preparing an ingot blank;
step 2, heating the ingot blank to 1010 ℃, preserving heat for 1h, and then extruding, wherein the extrusion ratio is greater than 9 and the extrusion speed is 17mm/s during extrusion;
step 3, rolling the extruded ingot blank at the rolling temperature of 500 ℃;
step 4, coating protective coating Cr on the surface of the rolled pipe2O3；
Step 5, carrying out solution treatment on the pipe coated with the protective coating; heating the pipe to 1010 ℃, preserving heat for 53min, and cooling the pipe to room temperature in air to complete the solution treatment;
step 6, carrying out aging treatment on the pipe subjected to the solution treatment; and (4) heating the pipe subjected to the solution treatment to 600 ℃, preserving the heat for 6h, and cooling the pipe to room temperature in air to finish the manufacture.
The invention has instructive significance for researching and developing the titanium alloy petroleum drill rod; the mechanical properties are as follows: tensile strength Rm850-960 Mpa, yield strength R0.2The elongation A is more than or equal to 12 percent, the Charpy impact power (V-shaped gap, longitudinal direction and room temperature) is more than or equal to 40J, and the mechanical property of the 105 ksi-grade petroleum drill pipe body can be met.
Claims (9)
1. The 105ksi titanium alloy pipe for the petroleum drill pipe is characterized by comprising, by mass, 4.9-5.3% of Al, 0.7-0.9% of Mo, 3.0-3.3% of V, 1.5-2% of Zr and the balance Ti.
2. A method for manufacturing a pipe for a 105ksi titanium alloy petroleum drill pipe is characterized by comprising the following steps,
step 1, preparing raw materials according to the components of the pipe, and sequentially smelting and casting to obtain an ingot blank, wherein the components of the pipe comprise, by mass, 4.9-5.3% of Al, 0.7-0.9% of Mo, 3.0-3.3% of V, 1.5-2% of Zr, and the balance of Ti;
step 2, heating the ingot blank and then extruding;
step 3, rolling the extruded ingot blank;
step 4, coating protective paint on the surface of the rolled pipe;
step 5, carrying out solution treatment on the pipe coated with the protective coating;
and 6, carrying out aging treatment on the pipe subjected to the solution treatment to finish the manufacture.
3. The method for manufacturing the pipe material for the 105ksi titanium alloy petroleum drill pipe as claimed in claim 2, wherein in the step 2, the ingot blank is heated to 980-1050 ℃, and is extruded after being kept warm for 1 h.
4. The method of claim 2, wherein in step 2, the extrusion rate is greater than 9 and the extrusion speed is 17 mm/s.
5. The method as claimed in claim 2, wherein the rolling temperature in step 3 is 450-550 ℃.
6. The method of claim 2, wherein in step 4, the protective coating is Cr2O3。
7. The method for manufacturing the pipe material of the 105ksi titanium alloy petroleum drill pipe as claimed in claim 2, wherein in the step 5, the solution treatment is performed by heating the pipe material to 980-1050 ℃, keeping the temperature for 45-60 min, and then cooling the pipe material to room temperature in an air cooling mode to obtain the pipe material after the solution treatment.
8. The method for manufacturing the pipe material of the 105ksi titanium alloy petroleum drill pipe as claimed in claim 2, wherein in the step 6, the aging treatment is to heat the pipe material after the solution treatment to 550-650 ℃ and preserve the temperature for 5-7 h, and then air-cool the pipe material to room temperature.
9. A105 ksi titanium alloy tubing for an oil drill pipe obtained by the method for manufacturing a 105ksi titanium alloy tubing for an oil drill pipe according to any one of claims 2 to 8.
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| CN202011240708.6A CN112442613A (en) | 2020-11-09 | 2020-11-09 | 105ksi titanium alloy pipe for petroleum drill pipe and manufacturing method thereof |
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| CN202011240708.6A CN112442613A (en) | 2020-11-09 | 2020-11-09 | 105ksi titanium alloy pipe for petroleum drill pipe and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112080668A (en) * | 2020-09-07 | 2020-12-15 | 鑫鹏源(聊城)智能科技有限公司 | Method for producing titanium alloy seamless tube by intelligent temperature control |
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| CN106636742A (en) * | 2016-11-17 | 2017-05-10 | 中世钛业有限公司 | ZSA-3 titanium alloy pipe, and preparation method and application thereof |
| CN108893651A (en) * | 2018-07-25 | 2018-11-27 | 中南大学 | A kind of high-strength high-ductility corrosion titanium alloy and preparation method thereof |
| CN111593230A (en) * | 2020-04-30 | 2020-08-28 | 中国石油天然气集团有限公司 | Pipe for 930 MPa-level ultrahigh-strength titanium alloy drill rod and manufacturing method thereof |
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- 2020-11-09 CN CN202011240708.6A patent/CN112442613A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20040231756A1 (en) * | 2003-05-22 | 2004-11-25 | Bania Paul J. | High strength titanium alloy |
| CN103898359A (en) * | 2014-04-17 | 2014-07-02 | 宝鸡钛业股份有限公司 | Titanium alloy and processing method thereof |
| CN106636742A (en) * | 2016-11-17 | 2017-05-10 | 中世钛业有限公司 | ZSA-3 titanium alloy pipe, and preparation method and application thereof |
| CN108893651A (en) * | 2018-07-25 | 2018-11-27 | 中南大学 | A kind of high-strength high-ductility corrosion titanium alloy and preparation method thereof |
| CN111593230A (en) * | 2020-04-30 | 2020-08-28 | 中国石油天然气集团有限公司 | Pipe for 930 MPa-level ultrahigh-strength titanium alloy drill rod and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112080668A (en) * | 2020-09-07 | 2020-12-15 | 鑫鹏源(聊城)智能科技有限公司 | Method for producing titanium alloy seamless tube by intelligent temperature control |
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