WO2014169593A1 - 超级13Cr工具接头的制造方法 - Google Patents
超级13Cr工具接头的制造方法 Download PDFInfo
- Publication number
- WO2014169593A1 WO2014169593A1 PCT/CN2013/084876 CN2013084876W WO2014169593A1 WO 2014169593 A1 WO2014169593 A1 WO 2014169593A1 CN 2013084876 W CN2013084876 W CN 2013084876W WO 2014169593 A1 WO2014169593 A1 WO 2014169593A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- super
- manufacturing
- tool joint
- quenching
- drill pipe
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/76—Making machine elements elements not mentioned in one of the preceding groups
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/30—Stress-relieving
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/58—Oils
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/11—Joints, e.g. ball joints, universal joints
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/13—Modifying the physical properties of iron or steel by deformation by hot working
Definitions
- the present invention relates to a method of manufacturing a joint, and more particularly to a method of manufacturing a high alloy joint. Background technique
- Drill pipes for oil and gas drilling are manufactured to API SPEC 5DP standards.
- the structure is to frictionally butt weld an externally threaded drill pipe joint and an internally threaded drill pipe joint at both ends of the drill pipe body.
- Drill rods conforming to the API SPEC 5 DP standard are made of low alloy steel.
- Aluminum alloy drill pipes are produced in accordance with ISO 15546.
- the aluminum alloy drill pipe is formed by connecting the aluminum alloy drill pipe body to a low alloy steel external thread joint and a low alloy steel internal thread joint through a fine thread.
- the structure of the titanium drill pipe is similar to that of an aluminum alloy drill pipe.
- the main purpose of using aluminum alloy drill pipe and titanium alloy drill pipe is twofold: one is to drill ultra-deep well by using aluminum alloy drill pipe and titanium alloy drill pipe with low specific gravity, and the other is to use aluminum alloy drill pipe and titanium alloy drill pipe. Resistance to sulfur sulfide stress corrosion drilling of sulfur-containing wells.
- the object of the present invention is to provide a method for manufacturing a super 13Cr tool joint, by which a super 13Cr tool joint suitable for a super 13Cr drill pipe can be produced, and the drill pipe is used for mining.
- C02 is a higher gas field.
- the present invention provides a method of manufacturing a super 13Cr tool joint that includes the following steps:
- the tool joint is normalized after forging, and the normalizing temperature is generally 80 (T950 ° C. This process will make the super 13Cr tool joint form martensite structure, so that the next steps It is difficult to carry out.
- the technical solution adopts the stress relief annealing treatment at 600-700 °C, so that the microstructure of the treated super 13Cr tool joint is tempered martensite structure, thereby facilitating subsequent processing.
- the chemical element mass distribution ratio of the super 13Cr tool joint is controlled as: C 0.0 ⁇ 0.05%, Si ⁇ 0.5%, Mn 0.2 to 1.0%, Cr 12 ⁇ 14%, Mo ⁇ 3%, Ni 4 ⁇ 6%, the balance is Fe and unavoidable impurities.
- the forging temperature is 1150-1200 °C.
- the quenching temperature is 950 to 1000 °C.
- the quenching is oil quenching.
- the quenching treatment is mainly performed by using a water-based quenching liquid having a certain medium concentration for overall quenching.
- the quenching of water-based quenching liquid requires adjustment of the concentration of the medium.
- the inventors have found through a large number of tests and analysis that if the concentration of the quenching liquid is too high, the quenching effect is not good; if the quenching liquid concentration is too low, the medium will be lost, resulting in quenching cracks.
- the quenching liquid will be lost, and the concentration of the medium needs to be monitored at any time, which brings certain difficulties to stable production. Therefore, in this technology
- quenching is performed by oil quenching. The performance of the oil is very stable, there is no need to adjust the concentration of the medium, nor does it cause quench cracks due to too high or too low a concentration.
- the tempering temperature is 600 to 650 °C.
- the method for manufacturing the super 13Cr tool joint according to the present invention can produce a super good quality super
- the 13Cr tool joint is adapted to produce a super 13Cr drill pipe in combination with the Super 13Cr pipe body.
- the super 13Cr tool joint prepared by the technical scheme has no galvanic corrosion at the joint of the pipe body, and does not cause serious corrosion at the joint portion.
- the super 13Cr tool joint made by the technical solution can achieve a mechanical performance of more than 1 lOks i. Detailed description of the invention
- the billet is obtained, and the chemical element mass ratio is controlled as follows: C 0.01 ⁇ 0.05%, Si ⁇ 0.5%, ⁇ 0 ⁇ 2 ⁇ 1 ⁇ 0%, Cr 12 ⁇ 14%, Mo 1 ⁇ 3%, Ni 4 ⁇ 6%, the balance is Fe and unavoidable impurities; (2) Forging the billet at 1150-1200 °C;
- Tempering controlling the tempering temperature to 600-650 °C.
- Table 1 lists the distribution ratios of the tool joints in the examples 1-5 of the present case.
- Example 3 0.02 0.34 0.40 12.3 1.1 4.9
- Example 4 0.03 0.42 0.52 12.5 1.9 5.5
- Example 5 0.04 0.25 0.65 13.7 2.5 4.5
- Table 2 lists the process parameters of the various steps in the examples 1-5 and the mechanical properties of the tool joint. .
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Child & Adolescent Psychology (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2891478A CA2891478C (en) | 2013-04-19 | 2013-10-09 | Method for manufacturing super 13cr tool coupler |
US14/784,448 US11162150B2 (en) | 2013-04-19 | 2013-10-09 | Method for manufacturing superior 13Cr tool coupler |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201310139112.0A CN104108003A (zh) | 2013-04-19 | 2013-04-19 | 超级13Cr工具接头的制造方法 |
CN201310139112.0 | 2013-04-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014169593A1 true WO2014169593A1 (zh) | 2014-10-23 |
Family
ID=51705097
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2013/084876 WO2014169593A1 (zh) | 2013-04-19 | 2013-10-09 | 超级13Cr工具接头的制造方法 |
Country Status (4)
Country | Link |
---|---|
US (1) | US11162150B2 (zh) |
CN (1) | CN104108003A (zh) |
CA (1) | CA2891478C (zh) |
WO (1) | WO2014169593A1 (zh) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104526289A (zh) * | 2014-12-02 | 2015-04-22 | 芜湖福司精密模具有限公司 | 一种抽水机传动轴的制造方法 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003105441A (ja) * | 2001-09-28 | 2003-04-09 | Kawasaki Steel Corp | 高強度・高靭性13Crマルテンサイト系ステンレス鋼継目無管の製造方法 |
US20050269074A1 (en) * | 2004-06-02 | 2005-12-08 | Chitwood Gregory B | Case hardened stainless steel oilfield tool |
CN101397637A (zh) * | 2007-09-29 | 2009-04-01 | 宝山钢铁股份有限公司 | 13Cr高抗二氧化碳和微量硫化氢腐蚀油套管用钢及其制造方法 |
CN101275207B (zh) * | 2007-03-27 | 2010-04-07 | 宝山钢铁股份有限公司 | 抗硫化氢腐蚀石油钻杆用工具接头的热处理方法 |
CN102172626B (zh) * | 2010-12-29 | 2012-07-25 | 天津钢管集团股份有限公司 | φ48-89mm超级13Cr油管的热轧生产方法 |
CN102619477A (zh) * | 2011-01-28 | 2012-08-01 | 中国石油大学(华东) | 一种耐磨耐蚀铁基合金激光熔覆石油钻杆接头 |
CN102851607A (zh) * | 2011-06-29 | 2013-01-02 | 宝山钢铁股份有限公司 | 110ksi级高抗CO2腐蚀油套管及其制造方法 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6063357A (ja) * | 1983-09-16 | 1985-04-11 | Toshiba Corp | 強度およびじん性に優れたマルテンサイト系ステンレス鋳鋼 |
CN1041642C (zh) * | 1994-06-17 | 1999-01-13 | 株式会社日立制作所 | 高韧性13Cr5Ni系不锈钢及其用途 |
JP3417275B2 (ja) * | 1997-11-06 | 2003-06-16 | 住友金属工業株式会社 | 熱間加工性及び耐硫化物応力割れ性に優れたマルテンサイト系ステンレス鋼継目無鋼管 |
JP4337268B2 (ja) * | 2001-02-27 | 2009-09-30 | 大同特殊鋼株式会社 | 耐食性に優れた高硬度マルテンサイト系ステンレス鋼 |
CA2532222C (en) * | 2003-07-22 | 2013-01-29 | Sumitomo Metal Industries, Ltd. | Martensitic stainless steel |
CN100363524C (zh) * | 2005-03-17 | 2008-01-23 | 上海材料研究所 | 一种耐腐蚀磨损的马氏体不锈钢及其制造方法及用途 |
CN101289730B (zh) * | 2007-04-20 | 2011-05-11 | 宝山钢铁股份有限公司 | 110ksi高钢级、高抗CO2腐蚀油套管的制法及使用该制法制得的油套管 |
CN101581200A (zh) * | 2009-05-31 | 2009-11-18 | 盘锦辽河油田派普钻具制造有限公司 | 一种120钢级钻杆及其制造工艺方法 |
JP5610445B2 (ja) * | 2011-10-20 | 2014-10-22 | 三菱日立パワーシステムズ株式会社 | タービン翼、それを用いたタービンロータ及び蒸気タービン |
CN102601597A (zh) * | 2012-04-01 | 2012-07-25 | 株洲春华实业有限责任公司 | 一种铁路用拉铆钉紧固件模具加工工艺 |
US20140161658A1 (en) * | 2012-12-06 | 2014-06-12 | Crs Holdings, Inc. | High Strength Precipitation Hardenable Stainless Steel |
CN103009026B (zh) * | 2012-12-26 | 2015-09-23 | 马鞍山市恒利达机械刀片有限公司 | 一种具有高耐磨性和强抗冲击性的滚剪刀加工方法 |
-
2013
- 2013-04-19 CN CN201310139112.0A patent/CN104108003A/zh active Pending
- 2013-10-09 US US14/784,448 patent/US11162150B2/en active Active
- 2013-10-09 WO PCT/CN2013/084876 patent/WO2014169593A1/zh active Application Filing
- 2013-10-09 CA CA2891478A patent/CA2891478C/en active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003105441A (ja) * | 2001-09-28 | 2003-04-09 | Kawasaki Steel Corp | 高強度・高靭性13Crマルテンサイト系ステンレス鋼継目無管の製造方法 |
US20050269074A1 (en) * | 2004-06-02 | 2005-12-08 | Chitwood Gregory B | Case hardened stainless steel oilfield tool |
CN101275207B (zh) * | 2007-03-27 | 2010-04-07 | 宝山钢铁股份有限公司 | 抗硫化氢腐蚀石油钻杆用工具接头的热处理方法 |
CN101397637A (zh) * | 2007-09-29 | 2009-04-01 | 宝山钢铁股份有限公司 | 13Cr高抗二氧化碳和微量硫化氢腐蚀油套管用钢及其制造方法 |
CN102172626B (zh) * | 2010-12-29 | 2012-07-25 | 天津钢管集团股份有限公司 | φ48-89mm超级13Cr油管的热轧生产方法 |
CN102619477A (zh) * | 2011-01-28 | 2012-08-01 | 中国石油大学(华东) | 一种耐磨耐蚀铁基合金激光熔覆石油钻杆接头 |
CN102851607A (zh) * | 2011-06-29 | 2013-01-02 | 宝山钢铁股份有限公司 | 110ksi级高抗CO2腐蚀油套管及其制造方法 |
Also Published As
Publication number | Publication date |
---|---|
US20160068924A1 (en) | 2016-03-10 |
CN104108003A (zh) | 2014-10-22 |
CA2891478C (en) | 2017-07-18 |
US11162150B2 (en) | 2021-11-02 |
CA2891478A1 (en) | 2014-10-23 |
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