CN103008979A - Production and refabrication technology for upsetting-type hollow sucker rod - Google Patents
Production and refabrication technology for upsetting-type hollow sucker rod Download PDFInfo
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- CN103008979A CN103008979A CN2011102848416A CN201110284841A CN103008979A CN 103008979 A CN103008979 A CN 103008979A CN 2011102848416 A CN2011102848416 A CN 2011102848416A CN 201110284841 A CN201110284841 A CN 201110284841A CN 103008979 A CN103008979 A CN 103008979A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 238000005516 engineering process Methods 0.000 title claims abstract description 11
- 238000003466 welding Methods 0.000 claims abstract description 18
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 238000005496 tempering Methods 0.000 claims abstract description 16
- 238000004140 cleaning Methods 0.000 claims abstract description 14
- 238000004513 sizing Methods 0.000 claims abstract description 12
- 238000012360 testing method Methods 0.000 claims abstract description 11
- 230000001681 protective effect Effects 0.000 claims abstract description 10
- 238000005728 strengthening Methods 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 239000002699 waste material Substances 0.000 claims abstract description 6
- 238000000137 annealing Methods 0.000 claims abstract description 5
- 238000005096 rolling process Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 37
- 239000000843 powder Substances 0.000 claims description 19
- 230000008569 process Effects 0.000 claims description 16
- 229910052751 metal Inorganic materials 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 15
- 238000004806 packaging method and process Methods 0.000 claims description 12
- 238000005086 pumping Methods 0.000 claims description 11
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 10
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 8
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 5
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000002175 menstrual effect Effects 0.000 claims description 2
- 230000004936 stimulating effect Effects 0.000 claims description 2
- 239000002689 soil Substances 0.000 claims 1
- 238000009721 upset forging Methods 0.000 claims 1
- 238000005536 corrosion prevention Methods 0.000 abstract description 6
- 230000004907 flux Effects 0.000 abstract description 3
- 238000003754 machining Methods 0.000 abstract 2
- 238000012856 packing Methods 0.000 abstract 2
- 238000003032 molecular docking Methods 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000005422 blasting Methods 0.000 description 4
- 230000002708 enhancing effect Effects 0.000 description 4
- 239000004519 grease Substances 0.000 description 4
- 230000002706 hydrostatic effect Effects 0.000 description 4
- 230000001050 lubricating effect Effects 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- 230000008439 repair process Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
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Abstract
The invention provides a production and refabrication technology for an upsetting-type hollow sucker rod. The production technology for the upsetting-type hollow sucker rod comprises the following steps of: (1) sending raw materials into a factory; (2) straightening and sizing; (3) magnetic flux leakage testing; (4) upsetting a rod head; (5) normalizing and tempering; (6) straightening; (7) strengthening the surface; (8) carrying out rod head flaw detection; (9) thread machining; (10) testing hydraulic pressure; (11) carrying out inner wall corrosion prevention; (12) installing a coupler and a protective cap; and (13) packing. The refabrication technology for the upsetting-type hollow sucker rod comprises the following steps of: (1) docking a waste and old sucker rod; (2) cleaning; (3) annealing; (4) rolling and repairing an inner wall and an outer wall; (5) cropping and sizing; (6) upsetting the rod head; (7) normalizing; (8) tempering; (9) straightening; (10) strengthening the surface; (11) carrying out rod head flaw detection; (12) thread machining; (13) cleaning the inner wall and dredging a channel; (14) testing hydraulic pressure; (15) carrying out inner wall corrosion prevention; (16) installing the coupler and the protective cap; and (17) packing. According to the production and refabrication technology for the upsetting-type hollow sucker rod, the even strength of the whole sucker rod is guaranteed, and the possibility that the traditional welding position of the rod body and the rod head is likely to generate problems can be avoided.
Description
Technical Field
The invention relates to a hollow sucker rod in general, and more particularly relates to a production of an upset hollow sucker rod and a remanufacturing process of a waste hollow sucker rod.
Background
At present, the hollow sucker rod is produced by welding a threaded connecting part and a rod body by a high-speed rotating friction welding method. When the method is used for welding, the pre-pressing force and the friction time cannot be equal fundamentally, the metallographic structure of a welding part at high temperature changes, the concentricity of the two parts to be welded cannot be completely overlapped, so that the welding section area is reduced, the welding part of the manufactured sucker rod is weak, and the rod breakage accident happens when the hollow sucker rod is used.
In addition, a large number of hollow sucker rods are periodically and circularly eliminated from various domestic oil fields every year, and if the old sucker rods can be processed by a set of processing technology, the metal fatigue is eliminated, and the metallographic structure is recovered, the method is undoubtedly an effective way for realizing waste utilization, saving energy and reducing consumption. At present, the repair of the hollow sucker rod is only limited to cleaning the scrapped hollow sucker rod with dirt, and then the simple repair of repairing screw threads after flaw detection of the middle and lower bodies is carried out, or the rod head welding is carried out on the hollow sucker rod by using a friction welding technology.
Therefore, it is desirable to provide a method for better recycling of used hollow sucker rods while overcoming the drawbacks of the friction welding method.
Disclosure of Invention
The invention aims to provide a novel production process of a hollow sucker rod and a remanufacturing process of a waste hollow sucker rod, which can overcome the defects.
The invention relates to a production process of an upsetting type hollow sucker rod, which comprises the following steps of (1) putting raw materials into a factory; (2) straightening and sizing; (3) magnetic leakage flaw detection; (4) upsetting the club head; (5) normalizing and tempering; (6) straightening; (7) surface strengthening; (8) flaw detection of the rod head; (9) processing threads; (10) testing the water pressure; (11) the inner wall is anticorrosive; (12) putting a coupling and a protective cap; (13) and (6) packaging.
After the upsetting type hollow sucker rod is used up, the remanufacturing process of the upsetting type hollow sucker rod comprises the following steps: comprises (1) cutting off the waste sucker rod; (2) cleaning; (3) annealing; (4) rolling and repairing the inner wall and the outer wall; (5) cutting the head and sizing; (6) upsetting the club head; (7) normalizing; (8) tempering; (9) straightening; (10) surface strengthening; (11) flaw detection of the rod head; (12) processing threads; (13) cleaning the inner wall and stimulating the menstrual flow; (14) testing the water pressure; (15) the inner wall is anticorrosive; (16) putting a coupling and a protective cap; (17) and (6) packaging.
The requirement of the step (6) is as follows: the fixed-length polished rod is subjected to upsetting treatment, so that the rod head and the rod body are integrated, friction welding treatment of the rod head is not needed, stress points are reduced, and the incidence rate of rod breakage accidents is reduced; wherein, during upsetting, one end is upset internal thread blank, and the other end is upset external thread blank.
The normalizing method in the step (7) is as follows: the temperature is kept at 750 ℃ for 30-40 minutes, at 800 ℃ for 10-15 minutes, and at 950 ℃ for 5-20 minutes.
The tempering method in the step (8) is as follows: the temperature is kept at 400 ℃ for 5-10 minutes, at 500 ℃ for 5-10 minutes, and at 700 ℃ for 5-10 minutes.
The normalizing and tempering process with the graded temperature control and time control is an invention point of the invention, and through detection, the reconstructed rod body of the sucker rod can be firmer and the stress is more consistent.
The process steps for corrosion prevention of the inner wall in the step (15) are as follows: cleaning the inner wall, adding mixed metal powder into the inner wall, placing the hollow oil pumping pipe at the temperature of 400-450 ℃ for 5-7 hours, wherein the rotation speed of the oil pumping pipe is 2 r/min, and the mixed metal powder comprises the following components in parts by weight: 0.2-0.4 part of nano aluminum trihydride, 2-5 parts of aluminum powder, 20-30 parts of flaky zinc powder and 1-3 parts of aluminum chloride powder. The thickness of the metal powder is 50-200 micrometers, and the anticorrosion technology of the inner wall is another invention point of the invention, so that the service life of the sucker rod after being treated can be prolonged by about 1-3 years compared with that without being treated.
The above object is achieved by the following detailed technical solutions. The manufacturing process of the hollow sucker rod provided by the invention comprises the following steps: (1) purchasing hollow rod raw materials made of corresponding materials, and checking in the factory; (2) straightening the raw material rod with the straightness not meeting the requirement, and sizing according to the requirement of a customer; (3) carrying out magnetic flux leakage flaw detection treatment on the raw material rod; (4) the hollow polished rod after sizing is subjected to upsetting treatment, so that the rod head and the rod body form a whole, friction welding treatment of the rod head is not needed, stress points are reduced, and the incidence rate of rod breakage accidents is reduced; (5) normalizing and tempering the hollow rod after the rod head is upset, and regulating the heat to ensure that the tensile strength and the yield strength of the hollow sucker rod meet the requirements of SY/T5029-2006 standard, (6) straightening the hollow sucker rod to meet the requirements of international standards; (7) carrying out surface strengthening treatment on the tempered hollow sucker rod, and enhancing the surface strength of the middle rod body by changing the molecular arrangement of shot blasting or steel grit on the outer surface; (8) performing rod head flaw detection on the hollow sucker rod to ensure that the surface quality of the rod head part is qualified; (9) processing threads on the hollow sucker rod to enable the threads to meet the requirements of SY/T5029-2006 standard on precision and strength; (10) carrying out hydrostatic pressure test on the hollow sucker rod to enable the strength of the hollow sucker rod to reach SY/T5029-2006 standard; (11) performing anti-corrosion and rust-corrosion treatment on the inner wall of the hollow sucker rod; (12) sealing rings and couplings are arranged, lubricating grease is smeared at two ends of the hollow sucker rod, and then protective caps are arranged; (13) and finally, spraying paint and packaging according to the packaging requirement.
The technical scheme of the remanufacturing process of the hollow sucker rod provided by the invention comprises the following steps: (1) firstly cutting off the upsetting parts at two ends of the scrapped hollow sucker rod losing the service capacity, and only remaining the middle polished rod; (2) cleaning the optical rod to remove dirt; (3) the stress of the tired hollow polished rod is removed by annealing the cleaned hollow polished rod; (4) rolling the hollow polished rod by using a hot rolling technology to repair pits corroded or worn by the inner wall and the outer wall of the hollow polished rod; (5) cutting the head of the hollow polished rod with clean scale removal to carry out scaling according to the requirements of customers; (6) upsetting the polished rod after sizing, so that the rod head and the rod body form a whole, friction welding treatment of the rod head is not needed, stress points are reduced, and the incidence rate of rod breakage accidents is reduced; (7) normalizing the hollow rod after the head is upset, (8) tempering to ensure that the tensile strength and the yield strength of the hollow sucker rod meet the requirements of SY/T5029-2006 standard, (9) straightening the hollow sucker rod to meet the requirements of international standards; (10) performing surface strengthening treatment on the tempered hollow sucker rod, and enhancing the surface strength of the rod body by changing the molecular arrangement of shot blasting or steel grit on the outer surface; (11) performing rod head flaw detection on the hollow sucker rod to ensure that the surface quality of the rod head part is qualified; (12) processing threads on the hollow sucker rod to enable the threads to meet the requirements of SY/T5029-2006 standard on precision and strength; (13) the inner wall of the hollow sucker rod is communicated by a universal warp gauge, so that the inner wall is smooth, and no scrap iron or dust is generated; (14) carrying out hydrostatic pressure test on the hollow sucker rod to enable the strength of the hollow sucker rod to reach SY/T5029-2006 standard; (15) performing anti-corrosion and rust-corrosion treatment on the inner wall of the hollow sucker rod; (16) sealing rings and couplings are arranged, and protective caps are arranged on two ends of the hollow sucker rod after lubricating grease is smeared on the two ends of the hollow sucker rod; (17) and finally, spraying paint and packaging according to the packaging requirement.
By utilizing the technical scheme, the following beneficial effects are realized: the production and remanufacturing process of the upsetting type hollow sucker rod provided by the invention has the advantages that the upsetting is carried out on the head of the hollow sucker rod, then the thermal refining treatment is carried out on the whole rod, the strength uniformity of the whole rod is ensured, and the possibility that the welding part of the traditional rod body and the rod head is easy to cause problems is avoided.
Drawings
The invention can be better understood with reference to the following drawings and description. Wherein,
FIG. 1 is a flow chart illustrating the process for producing an upset hollow sucker rod according to the present invention.
FIG. 2 is a flow chart illustrating a process for remanufacturing an upset hollow sucker rod according to the present invention.
Detailed Description
The manufacturing process of the hollow sucker rod provided by the invention comprises the following steps: (1) purchasing hollow rod raw materials made of corresponding materials, and checking in the factory; (2) straightening the raw material rod with the straightness not meeting the requirement, and sizing according to the requirement of a customer; (3) carrying out magnetic flux leakage flaw detection treatment on the raw material rod; (4) the hollow polished rod after sizing is subjected to upsetting treatment, so that the rod head and the rod body form a whole, friction welding treatment of the rod head is not needed, stress points are reduced, and the incidence rate of rod breakage accidents is reduced; (5) normalizing and tempering the hollow rod after the rod head is upset, and regulating the heat to ensure that the tensile strength and the yield strength of the hollow sucker rod meet the requirements of SY/T5029-2006 standard, (6) straightening the hollow sucker rod to meet the requirements of international standards; (7) carrying out surface strengthening treatment on the tempered hollow sucker rod, and enhancing the surface strength of the middle rod body by changing the molecular arrangement of shot blasting or steel grit on the outer surface; (8) performing rod head flaw detection on the hollow sucker rod to ensure that the surface quality of the rod head part is qualified; (9) processing threads on the hollow sucker rod to enable the threads to meet the requirements of SY/T5029-2006 standard on precision and strength; (10) carrying out hydrostatic pressure test on the hollow sucker rod to enable the strength of the hollow sucker rod to reach SY/T5029-2006 standard; (11) performing anti-corrosion and rust-corrosion treatment on the inner wall of the hollow sucker rod; (12) sealing rings and couplings are arranged, lubricating grease is smeared at two ends of the hollow sucker rod, and then protective caps are arranged; (13) and finally, spraying paint and packaging according to the packaging requirement.
The technical scheme of the remanufacturing process of the hollow sucker rod provided by the invention comprises the following steps: (1) firstly cutting off the upsetting parts at two ends of the scrapped hollow sucker rod losing the service capacity, and only remaining the middle polished rod; (2) cleaning the optical rod to remove dirt; (3) the stress of the tired hollow polished rod is removed by annealing the cleaned hollow polished rod; (4) rolling the hollow polished rod by using a hot rolling technology to repair pits corroded or worn by the inner wall and the outer wall of the hollow polished rod; (5) cutting the head of the hollow polished rod with clean scale removal to carry out scaling according to the requirements of customers; (6) upsetting the polished rod after sizing, so that the rod head and the rod body form a whole, friction welding treatment of the rod head is not needed, stress points are reduced, and the incidence rate of rod breakage accidents is reduced; (7) normalizing the hollow rod after the head is upset, (8) tempering to ensure that the tensile strength and the yield strength of the hollow sucker rod meet the requirements of SY/T5029-2006 standard, (9) straightening the hollow sucker rod to meet the requirements of international standards; (10) performing surface strengthening treatment on the tempered hollow sucker rod, and enhancing the surface strength of the rod body by changing the molecular arrangement of shot blasting or steel grit on the outer surface; (11) performing rod head flaw detection on the hollow sucker rod to ensure that the surface quality of the rod head part is qualified; (12) processing threads on the hollow sucker rod to enable the threads to meet the requirements of SY/T5029-2006 standard on precision and strength; (13) the inner wall of the hollow sucker rod is communicated by a universal warp gauge, so that the inner wall is smooth, and no scrap iron or dust is generated; (14) carrying out hydrostatic pressure test on the hollow sucker rod to enable the strength of the hollow sucker rod to reach SY/T5029-2006 standard; (15) performing anti-corrosion and rust-corrosion treatment on the inner wall of the hollow sucker rod; (16) sealing rings and couplings are arranged, and protective caps are arranged on two ends of the hollow sucker rod after lubricating grease is smeared on the two ends of the hollow sucker rod; (17) and finally, spraying paint and packaging according to the packaging requirement.
Treatment method example 1: the normalizing method in the step (7) is as follows: the temperature is kept at 750 ℃ for 30 minutes, at 800 ℃ for 10 minutes and at 950 ℃ for 5 minutes. The tempering method in the step (8) is as follows: the temperature is kept at 400 ℃ for 5 minutes, 500 ℃ for 5 minutes and 700 ℃ for 5 minutes. The process steps for corrosion prevention of the inner wall in the step (15) are as follows: cleaning the inner wall, adding mixed metal powder into the inner wall, placing the hollow oil pumping pipe at 400 ℃ for 5 hours, wherein the rotation speed of the oil pumping pipe is 2 r/min, and the thickness of the metal powder is 200 microns; wherein the mixed metal powder comprises the following components in parts by weight: 0.2 part of nano aluminum trihydride, 2 parts of aluminum powder, 20 parts of flaky zinc powder and 1 part of aluminum chloride powder.
Example 2 of treatment method: the normalizing method in the step (7) is as follows: the temperature is kept at 750 ℃ for 40 minutes, at 800 ℃ for 15 minutes and at 950 ℃ for 20 minutes. The tempering method in the step (8) is as follows: the temperature is kept at 400 ℃ for 10 minutes, 500 ℃ for 10 minutes and 700 ℃ for 10 minutes. The process steps for corrosion prevention of the inner wall in the step (15) are as follows: cleaning the inner wall, adding mixed metal powder into the inner wall, placing the hollow oil pumping pipe at 450 ℃ for 7 hours, wherein the rotation speed of the oil pumping pipe is 2 r/min, and the thickness of the metal powder is 50 microns; wherein the mixed metal powder comprises the following components in parts by weight: 0.4 part of nano aluminum trihydride, 5 parts of aluminum powder, 30 parts of flaky zinc powder and 3 parts of aluminum chloride powder.
Example treatment 3: the normalizing method in the step (7) is as follows: the temperature is kept at 750 ℃ for 30-40 minutes, at 800 ℃ for 10-15 minutes and at 950 ℃ for 10 minutes. The tempering method in the step (8) is as follows: the temperature is kept at 400 ℃ for 7 minutes, at 500 ℃ for 7 minutes and at 700 ℃ for 8 minutes. The process steps for corrosion prevention of the inner wall in the step (15) are as follows: cleaning the inner wall, adding mixed metal powder into the inner wall, placing the hollow oil pumping pipe at 420 ℃ for 6 hours, wherein the rotation speed of the oil pumping pipe is 2 r/min, and the thickness of the metal powder is 100 microns; wherein the mixed metal powder comprises the following components in parts by weight: 0.3 part of nano aluminum trihydride, 3 parts of aluminum powder, 25 parts of flaky zinc powder and 2 parts of aluminum chloride powder.
By utilizing the technical scheme, the following beneficial effects are realized: the production and remanufacturing process of the upsetting type hollow sucker rod provided by the invention has the advantages that the upsetting is carried out on the head of the hollow sucker rod, then the thermal refining treatment is carried out on the whole rod, the strength uniformity of the whole rod is ensured, and the possibility that the welding part of the traditional rod body and the rod head is easy to cause problems is avoided.
Claims (6)
1. A production process of an upset hollow sucker rod comprises (1) putting raw materials into a factory; (2) straightening and sizing; (3) magnetic leakage flaw detection; (4) upsetting the club head; (5) normalizing and tempering; (6) straightening; (7) surface strengthening; (8) flaw detection of the rod head; (9) processing threads; (10) testing the water pressure; (11) the inner wall is anticorrosive; (12) putting a coupling and a protective cap; (13) and (6) packaging.
2. The utility model provides a reproduction soil technology of upset forging formula hollow sucker rod which characterized in that: comprises (1) cutting off the waste sucker rod; (2) cleaning; (3) annealing; (4) rolling and repairing the inner wall and the outer wall; (5) cutting the head and sizing; (6) upsetting the club head; (7) normalizing; (8) tempering; (9) straightening; (10) surface strengthening; (11) flaw detection of the rod head; (12) processing threads; (13) cleaning the inner wall and stimulating the menstrual flow; (14) testing the water pressure; (15) the inner wall is anticorrosive; (16) putting a coupling and a protective cap; (17) and (6) packaging.
3. The remanufactured earthen process of claim 2, wherein: the requirement of the step (6) is that: the fixed-length polished rod is subjected to upsetting treatment, so that the rod head and the rod body are integrated, friction welding treatment of the rod head is not needed, stress points are reduced, and the incidence rate of rod breakage accidents is reduced; wherein, during upsetting, one end is upset internal thread blank, and the other end is upset external thread blank.
4. The remanufactured earthen process of claim 2, wherein: the normalizing method in the step (7) is as follows: the temperature is kept at 750 ℃ for 30-40 minutes, at 800 ℃ for 10-15 minutes, and at 950 ℃ for 5-20 minutes.
5. The remanufactured earthen process of claim 2, wherein: the tempering method in the step (8) comprises the following steps: the temperature is kept at 400 ℃ for 5-10 minutes, at 500 ℃ for 5-10 minutes, and at 700 ℃ for 5-10 minutes.
6. The remanufactured earthen process of claim 2, wherein: the process for preventing the inner wall from being corroded in the step (15) comprises the following steps: cleaning the inner wall, adding mixed metal powder into the inner wall, and placing the hollow oil pumping pipe at the temperature of 400-450 ℃ for 5-7 hours, wherein the rotation speed of the oil pumping pipe is 2 r/min, and the thickness of the oil pumping pipe is 50-200 microns; wherein the mixed metal powder comprises the following components in parts by weight: 0.2-0.4 part of nano aluminum trihydride, 2-5 parts of aluminum powder, 20-30 parts of flaky zinc powder and 1-3 parts of aluminum chloride powder.
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| CN2011102848416A CN103008979A (en) | 2011-09-23 | 2011-09-23 | Production and refabrication technology for upsetting-type hollow sucker rod |
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| CN2011102848416A CN103008979A (en) | 2011-09-23 | 2011-09-23 | Production and refabrication technology for upsetting-type hollow sucker rod |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103286246A (en) * | 2013-05-16 | 2013-09-11 | 湖北德克特种异型高强螺栓有限公司 | Method for manufacturing high-strength screws with fine threads for wind-driven generator foundations |
| CN104588998A (en) * | 2015-01-26 | 2015-05-06 | 内蒙古包钢钢联股份有限公司 | Manufacturing method for short-pitch external thickened oil pipe with upset pipe ends |
| CN104772598A (en) * | 2015-04-24 | 2015-07-15 | 孙伟 | Method for compositely repairing scraped polish rod of pumping unit |
| US20160151819A1 (en) * | 2012-08-24 | 2016-06-02 | Michael Eric Johnson | Sucker rod |
| CN108188749A (en) * | 2018-02-07 | 2018-06-22 | 宁夏长鑫防腐工程有限公司 | The technique and processing unit that a kind of waste and old beam hanger remanufactures |
| CN108381114A (en) * | 2018-02-07 | 2018-08-10 | 宁夏长鑫防腐工程有限公司 | Old pumping rod fatigue strength restores technique and its device |
| CN109128699A (en) * | 2018-08-27 | 2019-01-04 | 中国石油集团渤海石油装备制造有限公司 | Drilling rod remanufactures the method and tubing and casing of tubing and casing |
| US10195699B2 (en) | 2012-08-24 | 2019-02-05 | Trc Services, Inc. | Sucker rod |
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