CN110983102B - Titanium alloy oil pipe and manufacturing method thereof - Google Patents
Titanium alloy oil pipe and manufacturing method thereof Download PDFInfo
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- CN110983102B CN110983102B CN201911214203.XA CN201911214203A CN110983102B CN 110983102 B CN110983102 B CN 110983102B CN 201911214203 A CN201911214203 A CN 201911214203A CN 110983102 B CN110983102 B CN 110983102B
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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
- 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 titanium alloy oil pipe and a manufacturing method thereof, wherein the titanium alloy oil pipe comprises the following chemical components in percentage by mass: al: 2.30-5.80, V: 1.80-5.20, Nb: 0.80-2.50, Zr: 2.50-6.50, Mo: 1.50-6.50, Pd: 0.15 to 0.60 percent of rare earth elements, 0.10 to 0.50 percent of rare earth elements, less than or equal to 0.05 percent of C, less than or equal to 0.20 percent of Fe, less than or equal to 0.05 percent of N, and the balance of Ti and inevitable impurities, wherein after the components are smelted, forged, perforated and rolled, cold rolled, warm drawn, heat treated, straightened and subjected to nondestructive testing, the pipe end is processed according to the designed special thread, and the mechanical property of the finally manufactured titanium alloy oil pipe product meets the following requirements: yield strength rp 0.2: 758MPa-965MPa, tensile strength Rm not less than 862MPa, elongation A50 not less than 14%, Charpy impact value not less than 45J at-10 ℃, meeting the requirement of 110ksi strength level of APISpec 5CT standard, and good CO resistance2、H2S and Cl‑The coexistence of harsh corrosive environment and stress corrosion performance requirements can meet the development requirements of oil and gas fields in deep wells, ultra-deep wells and harsh corrosive environments.
Description
The technical field is as follows:
the invention relates to the field of metal materials and petroleum and gas exploitation industry, in particular to a titanium alloy oil pipe and a manufacturing method thereof.
Background art:
at present, along with the continuous development of oil and gas field exploitation in depth, unconventional oil and gas wells such as shale gas, heavy oil, combustible ice and the like, high-temperature high-pressure wells and H2S、CO2And Cl < - > coexisting in a severe corrosion environment, and at present, the nickel-based alloy oil pipes such as G3, 825, 625, 2550, 028 and the like with good corrosion resistance are adopted. The self weight of the nickel-based alloy is heavy, so that the downhole depth of an oil pipe is severely limited, the downhole temperature is continuously increased along with the continuous increase of the downhole depth, and the corrosion resistance of the nickel-based alloy is unsatisfactory at higher temperature. Compared with the prior art, the titanium alloy has small density which is only 60 percent of the density of the nickel-based alloy, and the titanium alloy has better high-temperature performance and corrosion resistance, is more suitable for the exploitation of deep wells, ultra-deep wells, oil and gas wells in high-temperature high-pressure and severe corrosive environments, and effectively improves the safety service of shafts. Therefore, the development of a titanium alloy oil pipe product becomes a technical problem which needs to be solved urgently.
The invention content is as follows:
the present invention is directed to overcoming the above-mentioned disadvantages of the prior art and providing a titanium alloy oil pipe and a method for manufacturing the same, the titanium alloy oil pipe having excellent CO resistance2、H2S、Cl-Coexistence ofAnd the stress corrosion performance can meet the oil field requirements of harsh corrosive environments.
The purpose of the invention is solved by the following technical scheme: a titanium alloy oil pipe comprises the following chemical components in percentage by mass: al: 2.00-5.80, V: 1.80-5.20, Nb: 0.80-2.50, Zr: 2.50-6.50, Mo: 1.50-6.50, Pd: 0.15-0.60, rare earth: 0.10-0.50, C is less than or equal to 0.05, Fe is less than or equal to 0.20, N is less than or equal to: 0.05, and the balance of Ti and inevitable impurities.
The manufacturing method of the titanium alloy oil pipe comprises the following steps:
step 1: smelting and forging, pressing the ingredients into electrodes, smelting for 3 times in a vacuum consumable electric furnace to form an ingot, heating the ingot to 1050-1250 ℃ through medium-frequency induction heating, preserving heat for 90-120 min in a soaking furnace, forging the ingot from a round billet into a square billet, forging for 3-9 times, drawing to obtain a forged rod round billet with phi 130mm, and finishing into a rod billet with phi 120mm through machining;
step 2: performing oblique rolling perforation, performing medium-frequency induction heating on the bar blank to 960-1100 ℃, preserving heat for 25-50 min in a soaking furnace, performing three-roller oblique rolling perforation to form a capillary tube with the diameter of phi 140mm multiplied by 16mm, and performing surface borax blasting descaling treatment on the capillary tube;
and step 3: cold rolling, namely performing cold rolling on the tubular billet on a cold rolling mill for one pass to obtain a phi 115mm multiplied by 12mm crude tube;
and 4, step 4: warm drawing, heating the pierced billet with phi of 115mm multiplied by 12mm to 450-550 ℃, coating a lubricant on the inner surface and the outer surface of the pierced billet, drawing the pierced billet into a specification with phi of 88.9mm multiplied by 7.34mm on a drawing machine, and cutting off a drawing pipe head to form a pierced billet with phi of 88.9mm multiplied by 7.34 mm;
and 5: heating the tube blank to 850-950 ℃, preserving heat for 45-60 min, taking the tube blank out of the furnace, rotating the tube blank on a cooling bed, cooling the tube blank to room temperature, heating the tube blank to 650-780 ℃, preserving heat for 90-150 min, rotating the tube blank on the cooling bed, cooling the tube blank to 540-620 ℃, then entering a six-roller thermal straightening machine for thermal straightening, rotating the tube blank on the cooling bed, cooling the tube blank to room temperature, and rotating the tube blank to ensure the straightness of the tube blank;
step 6: performing surface treatment and nondestructive testing, namely performing inner surface and outer surface pickling treatment on the tube blank, and performing whole tube ultrasonic testing and eddy current nondestructive testing to ensure that the testing grade reaches the requirement of API Spec 5CT L2 grade;
and 7: and (3) processing threads at the pipe end, namely processing the threads at the two ends of the pipe blank of the titanium alloy oil pipe qualified by nondestructive testing according to the designed threaded joint.
The invention has the beneficial effects that:
the mechanical property of the titanium alloy oil pipe meets the 110 ksi-level strength required by the API Spec 5CT standard, and the yield strength Rp0.2: 758-965 MPa, tensile strength Rm not less than 862MPa, elongation A50 not less than 14%, Charpy impact value not less than 45J at-10 deg.C, and H at 160 deg.C2S partial pressure 5MPa, CO2Partial pressure 11MPa, total pressure: 25MPa, Cl-The concentration is 100000mg/L-150000mg/L, and the corrosion inhibitor is used in a harsh corrosion environment of an oil field, and meets the requirements of corrosion working conditions of the oil field.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to specific embodiments below:
example 1:
the titanium alloy oil pipe in the embodiment 1 comprises the following chemical components in percentage by mass: al: 2.80, V: 2.50, Nb: 1.90, Zr: 3.70, Mo: 5.20, Pd: 0.35, rare earth element: 0.18, C: 0.03, Fe: 0.18, N: 0.03, and the balance of Ti and inevitable impurities.
(1) Proportioning the components, smelting for 3 times by using a vacuum consumable electrode arc furnace, carrying out medium-frequency induction heating on an ingot to 1100 ℃, preserving heat for 100min in a soaking furnace, forging for 5 times to prepare a forging blank, drawing into a bar blank with phi 130mm, and peeling and trimming into a bar blank with phi 120mm by machining;
(2) and (3) oblique piercing: heating the bar billet with the diameter of 120mm to 1050 ℃ by adopting medium-frequency induction, preserving heat for 35min in a soaking furnace, punching into a capillary tube with the diameter of 140mm multiplied by 16mm by three-roller inclined rolling, and carrying out high-pressure borax blowing descaling treatment on the surface of the capillary tube;
(3) cold rolling: cold rolling the tubular billet on a five-three-roller cold rolling mill to obtain a phi 115mm multiplied by 12mm pierced billet;
(4) warm drawing: the pierced billet with phi of 115mm multiplied by 12mm is quickly heated to 520 ℃ by medium frequency induction, the inner surface and the outer surface of the pierced billet are sprayed with lubricant, the pierced billet is drawn on a drawing machine to be drawn into the specification of phi of 88.9mm multiplied by 7.34mm, and then the drawing pipe head is cut off to form the required tube blank with phi of 88.9mm multiplied by 7.34 mm;
(5) heat treatment and straightening: heating the tube blank to 900 ℃, keeping the temperature for 55min, discharging the tube blank, rotating the tube blank on a cooling bed, performing air cooling to room temperature, heating the tube blank to 750 ℃ again, keeping the temperature for 120min, discharging the tube blank, rotating the tube blank on the cooling bed, performing air cooling to 600 ℃, then, entering a six-roller thermal straightening machine for thermal straightening, and continuously rotating the tube blank on the cooling bed, and performing air cooling to room temperature after straightening;
(6) surface treatment and nondestructive testing: performing acid pickling treatment on the inner surface and the outer surface of the tube blank, and performing whole-tube ultrasonic nondestructive testing and eddy nondestructive testing to obtain a qualified titanium alloy oil tube blank;
(7) processing pipe end threads: and (3) carrying out two-end thread machining on the titanium alloy oil pipe blank according to the designed threaded joint to obtain a finished pipe of the titanium alloy oil pipe.
Through detection, the mechanical property results of the titanium alloy oil pipe in the embodiment 1 are as follows: yield strength rp 0.2: 830MPa, tensile strength Rm more than or equal to 975MPa, elongation A50 more than or equal to 15.5%, Charpy impact value at-10 ℃: 64J, meets the 110ksi strength requirement in the API Spec 5CT standard.
Hydrogen Sulfide Stress Corrosion (SSC) resistance test was performed using method A liquid according to standard NACE TM 0177 at 95% Rp0.2Under the loading stress, no cracking phenomenon occurs after 720 hours of test.
H-resistance in high-temperature autoclaves2S、CO2And Cl-Coexisting with corrosive environment, test temperature of 160 +/-5 ℃, total pressure of 25MPa, H2S partial pressure: 4.5MPa, CO2Partial pressure: 11MPa, Cl-Concentration: 120000mg/L, the test time is 168 hours, no obvious corrosion phenomenon appears before and after the sample is corroded, the weight loss method is adopted for measurement, and the corrosion rate is as follows: 0.00056mm/a, which completely meets the requirement of corrosive environment.
Example 2:
in this embodiment 2, the titanium alloy oil pipe comprises the following chemical components in percentage by mass: al: 4.50, V: 4.00, Nb: 2.20, Zr: 6.00, Mo: 4.50, Pd: 0.55, rare earth: 0.35, less than or equal to 0.03 percent of C, less than or equal to 0.15 percent of Fe, less than or equal to 0 percent of N: 0.03, and the balance of Ti and inevitable impurities.
(1) Proportioning the components, smelting for 3 times by adopting a vacuum consumable electrode arc furnace, carrying out induction heating on the cast ingot to 1200 ℃, preserving heat for 90min in a soaking furnace, forging for 7 times to prepare a forging blank, drawing into a bar blank with phi 130mm, and peeling and trimming into a bar blank with phi 120mm by machining;
(2) and (3) oblique piercing: heating the bar blank with the diameter of 120mm to 990 ℃ by adopting medium-frequency induction, preserving heat for 45min in a soaking furnace, punching into a capillary tube with the diameter of 140mm multiplied by 16mm by three-roller inclined rolling, and carrying out high-pressure borax blowing descaling treatment on the surface of the capillary tube;
(3) cold rolling: cold rolling the tubular billet on a five-three-roller cold rolling mill to obtain a phi 115mm multiplied by 12mm pierced billet;
(4) warm drawing: the pierced billet with phi of 115mm multiplied by 12mm is quickly heated to 480 ℃ by medium frequency induction, lubricant is sprayed on the inner surface and the outer surface of the pierced billet, the pierced billet is drawn on a drawing machine to be drawn into the specification of phi of 88.9mm multiplied by 7.34mm, and then the drawing pipe head is cut off to form the required tube blank with phi of 88.9mm multiplied by 7.34 mm;
(5) heat treatment and straightening: heating the tube blank to 930 ℃, keeping the temperature for 45min, discharging the tube blank from the furnace, rotating the tube blank on a cooling bed, performing air cooling to room temperature, heating the tube blank to 680 ℃ again, keeping the temperature for 100min, discharging the tube blank from the furnace, rotating the tube blank on the cooling bed, performing air cooling to 560 ℃, then, entering a six-roller thermal straightening machine for thermal straightening, and continuously rotating the tube blank on the cooling bed after straightening, and performing air cooling to room temperature;
(6) surface treatment and nondestructive testing: performing acid pickling treatment on the inner surface and the outer surface of the tube blank, and performing whole-tube ultrasonic nondestructive testing and eddy nondestructive testing to obtain a qualified titanium alloy oil tube blank;
(7) processing pipe end threads: and (3) carrying out two-end thread machining on the titanium alloy oil pipe blank according to the designed threaded joint to obtain a finished pipe of the titanium alloy oil pipe.
Through detection, the mechanical property results of the titanium alloy oil pipe in the embodiment 2 are as follows: yield strength rp 0.2: 790MPa, tensile strength Rm not less than 950MPa, elongation A50 not less than 17%, Charpy impact value at-10 deg.C: 78J, meeting the strength requirement of 110ksi grade in the API Spec 5CT standard.
Hydrogen Sulfide Stress Corrosion (SSC) resistance test was performed using method A liquid according to standard NACE TM 0177 at 95% Rp0.2Under the loading stress, no cracking phenomenon occurs after 720 hours of test.
H-resistance in high-temperature autoclaves2S、CO2And Cl-Coexisting with corrosive environment, test temperature of 160 +/-5 ℃, total pressure of 25MPa, H2S partial pressure: 5MPa, CO2Partial pressure: 10MPa, Cl-Concentration: 150000mg/L, the test time is 168 hours, no obvious corrosion phenomenon appears before and after the sample is corroded, the weight loss method is adopted for measurement, and the corrosion rate is as follows: 0.00048mm/a, completely meets the requirement of corrosive environment.
The corrosion tests above illustrate that the titanium alloy oil pipe of the present example has good CO resistance2、H2S、Cl-Coexistence and stress corrosion performance, and can meet the oil field requirements of harsh corrosive environments.
While the invention has been described in further detail with reference to specific preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (2)
1. A manufacturing method of a titanium alloy oil pipe is characterized by comprising the following steps: the titanium alloy oil pipe comprises the following chemical components in percentage by mass: al: 2.00-5.80, V: 1.80-5.20, Nb: 0.80-2.50, Zr: 2.50-6.50, Mo: 1.50-6.50, Pd: 0.15-0.60, rare earth: 0.10-0.50, C is less than or equal to 0.05, Fe is less than or equal to 0.20, N is less than or equal to: 0.05, and the balance of Ti and inevitable impurities; the method comprises the following steps:
step 1: smelting and forging, pressing the ingredients into electrodes, smelting for 3 times in a vacuum consumable electric furnace to form an ingot, heating the ingot to 1050-1250 ℃ through medium-frequency induction heating, preserving heat for 90-120 min in a soaking furnace, forging the ingot from a round billet into a square billet, forging for 3-9 times, drawing to obtain a forged rod round billet with phi 130mm, and finishing into a rod billet with phi 120mm through machining;
step 2: performing oblique rolling perforation, performing medium-frequency induction heating on the bar blank to 960-1100 ℃, preserving heat for 25-50 min in a soaking furnace, performing three-roller oblique rolling perforation to form a capillary tube with the diameter of phi 140mm multiplied by 16mm, and performing surface borax blasting descaling treatment on the capillary tube;
and step 3: cold rolling, namely performing cold rolling on the tubular billet on a cold rolling mill for one pass to obtain a phi 115mm multiplied by 12mm crude tube;
and 4, step 4: warm drawing, heating the pierced billet with phi of 115mm multiplied by 12mm to 450-550 ℃, coating a lubricant on the inner surface and the outer surface of the pierced billet, drawing the pierced billet into a specification with phi of 88.9mm multiplied by 7.34mm on a drawing machine, and cutting off a drawing pipe head to form a pierced billet with phi of 88.9mm multiplied by 7.34 mm;
and 5: heating the tube blank to 850-950 ℃, preserving heat for 45-60 min, taking the tube blank out of the furnace, rotating the tube blank on a cooling bed, cooling the tube blank to room temperature, heating the tube blank to 650-780 ℃, preserving heat for 90-150 min, rotating the tube blank on the cooling bed, cooling the tube blank to 540-620 ℃, then entering a six-roller thermal straightening machine for thermal straightening, rotating the tube blank on the cooling bed, cooling the tube blank to room temperature, and rotating the tube blank to ensure the straightness of the tube blank;
step 6: performing surface treatment and nondestructive testing, namely performing inner surface and outer surface pickling treatment on the tube blank, and performing whole tube ultrasonic testing and eddy current nondestructive testing to ensure that the testing grade reaches the requirement of API Spec 5CT L2 grade;
and 7: and (3) processing threads at the pipe end, namely processing the threads at the two ends of the pipe blank of the titanium alloy oil pipe qualified by nondestructive testing according to the designed threaded joint.
2. The method of manufacturing a titanium alloy oil pipe according to claim 1, characterized in that: the mechanical properties of the titanium alloy oil pipe are as follows: yield strength rp 0.2: 758-965 MPa, tensile strength Rm not less than 862MPa, elongation A50 not less than 14%, Charpy impact value not less than 45J at-10 deg.C, and H at 160 deg.C2S partial pressure 5Mpa, CO2Partial pressure of 11MPa, total pressure of 25MPa, Cl-Oil with concentration of 100000mg/L-150000mg/LThe field is used in a severe corrosion environment.
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| CN112080656B (en) * | 2020-09-10 | 2021-06-25 | 西北有色金属研究院 | Preparation method of high-strength titanium alloy rod for additive manufacturing powder making |
| CN115786767B (en) * | 2021-09-10 | 2024-03-15 | 中国石油天然气集团有限公司 | High-toughness titanium alloy oil pipe and heat treatment method thereof |
| CN115369286B (en) * | 2022-08-29 | 2023-04-18 | 沈阳中核舰航特材科技有限公司 | Alpha + beta type titanium alloy for fastener, preparation method and preparation method of bar thereof |
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| JP2623826B2 (en) * | 1988-04-27 | 1997-06-25 | 日本鋼管株式会社 | High-strength β-based titanium alloy with excellent corrosion resistance and stress corrosion cracking resistance |
| JP3395443B2 (en) * | 1994-08-22 | 2003-04-14 | 住友金属工業株式会社 | High creep strength titanium alloy and its manufacturing method |
| KR20160096726A (en) * | 2011-07-26 | 2016-08-16 | 신닛테츠스미킨 카부시키카이샤 | Titanium alloy |
| CN102876922B (en) * | 2012-10-08 | 2014-07-16 | 天津钢管集团股份有限公司 | High-strength, high-toughness and corrosive environment resistant titanium alloy oil well pipe and manufacturing method thereof |
| CN103409658B (en) * | 2013-07-09 | 2016-04-13 | 中国船舶重工集团公司第七二五研究所 | A kind of resistance to 600 DEG C of high strength at high temperature can welding titanium alloy |
| CN103909112B (en) * | 2014-03-31 | 2015-12-02 | 攀钢集团成都钢钒有限公司 | 110ksi level titanium alloy oil pipe and production method thereof |
| CN104232993B (en) * | 2014-04-15 | 2017-03-08 | 宁夏东方钽业股份有限公司 | A kind of high-performance TC11 pipe and preparation method thereof |
| CN103898359B (en) * | 2014-04-17 | 2016-01-20 | 宝鸡钛业股份有限公司 | A kind of titanium alloy and working method thereof |
| CN104894432B (en) * | 2015-06-17 | 2017-03-29 | 宝鸡石油钢管有限责任公司 | A kind of 110ksi levels titanium alloy oil pipe and preparation method thereof |
| CN107012363B (en) * | 2016-01-28 | 2018-08-07 | 宝鸡石油钢管有限责任公司 | A kind of manufacturing process of TC4 titanium alloy oil well pipes |
| CN106636746B (en) * | 2016-12-28 | 2018-06-01 | 北京工业大学 | A kind of high-strength high-elongation ratio high-temperature titanium alloy and its preparation process |
| CN107297450B (en) * | 2017-06-26 | 2019-05-28 | 天津钢管集团股份有限公司 | A kind of upset method of high-strength tenacity titanium alloy drilling rod material |
| CN109161726B (en) * | 2018-09-11 | 2020-07-24 | 中国船舶重工集团公司第七二五研究所 | High-strength high-toughness corrosion-resistant titanium alloy and preparation method thereof |
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