CN113510211B - Continuous operation process for heating and upsetting pipe ends of drill pipe body - Google Patents
Continuous operation process for heating and upsetting pipe ends of drill pipe body Download PDFInfo
- Publication number
- CN113510211B CN113510211B CN202110761985.XA CN202110761985A CN113510211B CN 113510211 B CN113510211 B CN 113510211B CN 202110761985 A CN202110761985 A CN 202110761985A CN 113510211 B CN113510211 B CN 113510211B
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- pipe body
- heating
- upsetting
- drill pipe
- heat insulation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
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- 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
- B21K1/14—Making machine elements fittings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention provides a continuous operation process for heating and upsetting the pipe end of a drill pipe body, wherein a heating furnace is connected with an upsetting die through a heat insulation piece, a heating coil is arranged in the heating furnace, a heat insulation baffle A is arranged at one end of the heating furnace, a through hole A is arranged in the middle of the heat insulation baffle A, and the diameter of the through hole A is equal to the outer diameter of the drill pipe body; one end of the upsetting die is provided with a heat insulation baffle B, the middle part of the heat insulation baffle B is provided with a through hole B, and the diameter of the through hole B is equal to the outer diameter of the punch; the advantages are that: according to the invention, the heating furnace is connected with the upsetting device, the pipe end of the drill pipe body is heated in the heating furnace firstly, and then the heating is stopped after the pipe end is heated to a preset temperature, and the drill pipe body is moved to the upsetting die, so that the rapid upsetting of the pipe end is realized, the great reduction of the surface temperature of the pipe body is avoided, the oxidation risk of surface metal is reduced, the transfer time is shortened, the transfer equipment is reduced, the upsetting quality of the pipe body is improved, the production cost is reduced, and the production efficiency is improved.
Description
Technical Field
The invention relates to the field of drill rod manufacturing, in particular to a continuous operation process for heating and upsetting the pipe end of a drill rod pipe body.
Background
At present, a drill rod for petroleum drilling is mainly formed by friction welding of a drill rod pipe body and a drill rod joint, upsetting and thickening are needed to be carried out on two ends of the drill rod pipe body before friction welding of the drill rod so as to increase the wall thickness of a pipe end welding part and further increase the effective section of a friction welding joint area. At present, no matter the upsetting of the drill pipe body adopts the secondary upsetting or the tertiary upsetting, the method adopted is that the end part of the drill pipe body is firstly stretched into a heating furnace to be heated, then is taken out from the heating furnace and is put into an upsetting die, and the upsetting thickening is carried out on the end part of the drill pipe body through a punch. The following disadvantages and risks exist in the transportation process of the heated pipe body from the heating furnace into the upsetting die: firstly, a great deal of heat loss is caused, and the temperature of the tube body is obviously reduced; secondly, special equipment is required for transportation, time is spent, and production efficiency is reduced; thirdly, the surface of the drill pipe body at high temperature is exposed to air for a long time, so that a thicker oxide skin layer is easy to form, and the surface quality of pipe end upsetting is affected; fourthly, the temperature is limited by the minimum upsetting temperature of the drill rod material and is reduced in the transferring process, and the material is over-burned due to the fact that the heating temperature is too high.
Disclosure of Invention
The invention aims to solve the problems that the following defects and risks exist in the transportation process of a heated pipe body from a heating furnace to an upsetting die in the prior art: firstly, a great deal of heat loss is caused, and the temperature of the tube body is obviously reduced; secondly, special equipment is required for transportation, time is spent, and production efficiency is reduced; thirdly, the surface of the drill pipe body at high temperature is exposed to air for a long time, so that a thicker oxide skin layer is easy to form, and the surface quality of pipe end upsetting is affected; fourthly, the continuous operation process for heating and upsetting the pipe end of the drill pipe body is provided due to the limitation of the minimum upsetting temperature of the drill pipe material and the defects of material overburning caused by the too high heating temperature, and the like due to the temperature drop in the transportation process.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
the continuous heating and upsetting operation process for the pipe end of the drill pipe body comprises a heating furnace, a heating coil, an upsetting die, a punch, a heat insulating piece, a heat insulating baffle A and a heat insulating baffle B, wherein the heat insulating piece is arranged between the heating furnace and the upsetting die; and one end of the upsetting die far away from the heating furnace is provided with a heat insulation baffle B, the middle part of the heat insulation baffle B is provided with a through hole B, the punch head penetrates through the through hole B to enter the upsetting die, and the diameter of the through hole B is equal to the outer diameter of the punch head.
Preferably, the diameter of the through hole A is 2-5mm larger than the outer diameter of the drill pipe body.
Preferably, the diameter of the through hole A is 4mm larger than the outer diameter of the drill pipe body.
Preferably, the diameter of the through hole B is 2-4mm larger than the outer diameter of the punch.
Preferably, the diameter of the through hole B is 3mm larger than the outer diameter of the punch.
Preferably, the length of the heating coil is 250-450 mm, and the highest temperature which can be heated by the heating coil is not less than 1300 ℃.
Preferably, the heating temperature and the heating time of the heating coil are controllable, and the heating coil heats the drill pipe body in a stepped manner.
The continuous operation process flow of heating and upsetting the pipe end of the drill pipe body is as follows:
1) Closing the heat insulation piece, conveying the drill pipe body into a heating furnace through the heat insulation baffle A, and heating the pipe end of the drill pipe body by the heating coil;
2) The heating coil is used for heating the drill pipe body in a stepped mode, the drill pipe body is firstly heated to 720 ℃, the temperature is kept for 2min, then the drill pipe body is heated to 1010 ℃ and the temperature is kept for 3min, and then the heating coil stops heating;
3) Opening the heat insulation piece, moving the drill pipe body forward to the upsetting position of the upsetting die, clamping and fixing, enabling the punch to penetrate through the heat insulation baffle B and enter the upsetting die, and upsetting the pipe end of the drill pipe body by the punch;
4) After the pipe end of the drill pipe body is upset and molded, the punch is withdrawn from the upsetting die, the drill pipe body is withdrawn from the heating furnace, and the next manufacturing process is carried out.
The beneficial effects of the invention are as follows: according to the invention, the heating furnace is connected with the upsetting device, the pipe end of the drill pipe body is heated in the heating furnace firstly, and then the heating is stopped after the pipe end is heated to a preset temperature, and the drill pipe body is moved to the upsetting die, so that the rapid upsetting of the pipe end is realized, the great reduction of the surface temperature of the pipe body is avoided, the oxidation risk of surface metal is reduced, the transfer time is shortened, the transfer equipment is reduced, the upsetting quality of the pipe body is improved, the production cost is reduced, and the production efficiency is improved.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Wherein: 1. the device comprises a heating furnace, 2, a heating coil, 3, an upsetting die, 4, a punch, 5, a heat insulation piece, 6, heat insulation baffles A,7, heat insulation baffles B,8 and a drill pipe body.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the attached drawing figures:
the continuous heating and upsetting operation process for the pipe ends of the drill pipe body comprises a heating furnace 1, a heating coil 2, an upsetting die 3, a punch 4, a heat insulation piece 5, a heat insulation baffle A and a heat insulation baffle B, wherein the heat insulation piece 5 is assembled between the heating furnace 1 and the upsetting die 3, the heating coil 2 is installed in the heating furnace 1, a heat insulation baffle A6 is installed at one end of the heating furnace 1 far away from the upsetting die 3, a through hole A is formed in the middle of the heat insulation baffle A6, the drill pipe body 8 penetrates through the through hole A to enter the heating furnace 1, and the diameter of the through hole A is equal to the outer diameter of the drill pipe body 8; the end far away from the upsetting die 3 of the heating furnace 1 is provided with a heat insulation baffle B7, the middle part of the heat insulation baffle B7 is provided with a through hole B, the punch 4 penetrates through the through hole B to enter the upsetting die 3, and the diameter of the through hole B is equal to the outer diameter of the punch 4.
Preferably, the diameter of the through hole A is 2-5mm larger than the outer diameter of the drill pipe body 8.
Preferably, the diameter of the through hole A is 4mm larger than the outer diameter of the drill pipe body 8.
Preferably, the diameter of the through hole B is 2-4mm larger than the outer diameter of the punch 4.
Preferably, the diameter of the through hole B is 3mm larger than the outer diameter of the punch 4.
Preferably, the length of the heating coil 2 is 250-450 mm, and the highest heatable temperature of the heating coil 2 is not less than 1300 ℃.
Preferably, the heating temperature and heating time of the heating coil 2 are controllable, and the heating coil 2 heats the drill pipe body 8 in a stepwise manner.
The continuous operation process flow of heating and upsetting the pipe end of the drill pipe body is as follows:
1) Opening the heat insulation piece 5, and conveying the drill pipe body 8 into the heating furnace 1 through the heat insulation baffle A6, wherein the heating coil 2 starts to heat the pipe end of the pipe;
2) The heating coil 2 heats the drill pipe body 8 stepwise, firstly heats to 720 ℃, keeps the temperature for 2min, then heats to 1010 ℃ and keeps the temperature for 3min, and then the heating coil 2 stops heating;
3) Opening the heat insulation piece 5, moving the drill pipe body 8 forward to the upsetting position of the upsetting die 3, clamping and fixing, then enabling the punch 4 to penetrate through the heat insulation baffle B7 and enter the upsetting die 3, and upsetting the pipe end of the drill pipe body 8 by the punch 4;
4) After the pipe end of the drill pipe body 8 is upset and molded, the punch 4 is withdrawn from the upsetting die 3, the drill pipe body 8 is withdrawn from the heating furnace 1, and the next manufacturing process is carried out.
The above is only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (1)
1. The continuous operation process for heating and upsetting the pipe end of the drill pipe body comprises a heating furnace, a heating coil, an upsetting die, a punch, a heat insulating piece, a heat insulating baffle A and a heat insulating baffle B, and is characterized in that: a heat insulation piece is assembled between the heating furnace and the upsetting die, a heating coil is arranged in the heating furnace, a heat insulation baffle A is arranged at one end of the heating furnace far away from the upsetting die, a through hole A is arranged in the middle of the heat insulation baffle A, a drill pipe body penetrates through the through hole A to enter the heating furnace, and the diameter of the through hole A is equal to the outer diameter of the drill pipe body; a heat insulation baffle B is arranged at one end of the upsetting die far away from the heating furnace, a through hole B is formed in the middle of the heat insulation baffle B, a punch penetrates through the through hole B to enter the upsetting die, and the diameter of the through hole B is equal to the outer diameter of the punch;
the continuous operation process flow of heating and upsetting the pipe end of the drill pipe body is as follows:
1) Closing the heat insulation piece, conveying the drill pipe body into a heating furnace through the heat insulation baffle A, and heating the pipe end of the drill pipe body by the heating coil;
2) The heating coil is used for heating the drill pipe body stepwise, the temperature is firstly heated to 720 ℃, the temperature is kept for 2min, the temperature is then heated to 1010 ℃ and the temperature is kept for 3min, and then the heating coil stops heating;
3) Opening the heat insulation piece, moving the drill pipe body forward to the upsetting position of the upsetting die, clamping and fixing, enabling the punch to penetrate through the heat insulation baffle B and enter the upsetting die, and upsetting the pipe end of the drill pipe body by the punch;
4) After upsetting and forming the pipe end of the drill pipe body, the punch is withdrawn from the upsetting die, the drill pipe body is withdrawn from the heating furnace, and the next manufacturing process is carried out;
the diameter of the through hole A is 2-5mm larger than the outer diameter of the drill pipe body; the diameter of the through hole A is 4mm larger than the outer diameter of the drill pipe body; the diameter of the through hole B is 2-4mm larger than the outer diameter of the punch; the diameter of the through hole B is 3mm larger than the outer diameter of the punch; the length of the heating coil is 250-450 mm, and the highest temperature which can be heated by the heating coil is not less than 1300 ℃; the heating temperature and the heating time of the heating coil are controllable, and the heating coil heats the drill pipe body in a stepped mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110761985.XA CN113510211B (en) | 2021-07-06 | 2021-07-06 | Continuous operation process for heating and upsetting pipe ends of drill pipe body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110761985.XA CN113510211B (en) | 2021-07-06 | 2021-07-06 | Continuous operation process for heating and upsetting pipe ends of drill pipe body |
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| Publication Number | Publication Date |
|---|---|
| CN113510211A CN113510211A (en) | 2021-10-19 |
| CN113510211B true CN113510211B (en) | 2023-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110761985.XA Active CN113510211B (en) | 2021-07-06 | 2021-07-06 | Continuous operation process for heating and upsetting pipe ends of drill pipe body |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114985655A (en) * | 2022-06-15 | 2022-09-02 | 中国重型机械研究院股份公司 | Short-flow thickening method for pipe end of steel pipe by adopting two-time upsetting |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001286975A (en) * | 2000-04-04 | 2001-10-16 | Kuromatsu Denki Seisakusho:Kk | Heat retaining control method of induction heater for hot to warm forging |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201244648Y (en) * | 2008-01-23 | 2009-05-27 | 江苏凡力钢管有限公司 | Once upsetting intensification apparatus for oil well pipe |
| JP6496310B2 (en) * | 2013-10-09 | 2019-04-03 | ハンティング エナジー サービシーズ、インクＨｕｎｔｉｎｇ Ｅｎｅｒｇｙ Ｓｅｒｖｉｃｅｓ，Ｉｎｃ． | Drill pipe upset forging process |
| CN104525812B (en) * | 2014-12-16 | 2016-08-24 | 崔连义 | A kind of steel tube end part vibration jumping-up piecing devices and method |
| CN205217907U (en) * | 2015-12-29 | 2016-05-11 | 艾诺克(成都)机械制造有限公司 | A cabinet -type electric furnace for isothermal forging |
| CN109926531B (en) * | 2019-04-12 | 2020-12-01 | 中国石油集团渤海石油装备制造有限公司 | Pipe end upsetting method for titanium alloy drill pipe |
| CN111531103A (en) * | 2020-05-09 | 2020-08-14 | 贵州航天天马机电科技有限公司 | Induction heating upsetting device for aluminum alloy cylinder |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001286975A (en) * | 2000-04-04 | 2001-10-16 | Kuromatsu Denki Seisakusho:Kk | Heat retaining control method of induction heater for hot to warm forging |
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| CN113510211A (en) | 2021-10-19 |
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| CB02 | Change of applicant information |
Address after: 257091 east of Quanzhou Road, north of Fuqian street, development zone, Dongying City, Shandong Province Applicant after: Shandong Weima Equipment Technology Co.,Ltd. Applicant after: Shandong Hongfeng Intelligent Equipment Co.,Ltd. Address before: 257091 east of Quanzhou Road, north of Fuqian street, development zone, Dongying City, Shandong Province Applicant before: Shandong Weima Equipment Technology Co.,Ltd. Applicant before: Shandong Hongfeng offshore oil equipment Co.,Ltd. |
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