CN1952344A - Method for making super-high-strength anti-corrosion pumping polished rod - Google Patents
Method for making super-high-strength anti-corrosion pumping polished rod Download PDFInfo
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- CN1952344A CN1952344A CNA2006101146913A CN200610114691A CN1952344A CN 1952344 A CN1952344 A CN 1952344A CN A2006101146913 A CNA2006101146913 A CN A2006101146913A CN 200610114691 A CN200610114691 A CN 200610114691A CN 1952344 A CN1952344 A CN 1952344A
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Abstract
The invention relates to a production method for smooth sucker rod with ultra-high strength, comprising the following procedures. 1. Round bar of low alloy structure steel is prepared. 2. The blank of smooth sucker rod is prepared. 3. The blank surface of smooth sucker rod is sprayed and coated. 4. The blank of smooth sucker rod with alloy coating said above is remelted and cooled. 5. Smooth sucker rod is treated by tempering temperature. 6. Smooth sucker rod is polished. Finally, anti-corrosion smooth sucker rod with ultra-high strength is obtained. The smooth sucker rod by the method is applied in oil well with bad corrosive circumstance and prolongs the service time of smooth rod. Work times are decreased and oil production is improved.
Description
Technical field
The present invention relates to a kind of preparation method of super-high-strength anti-corrosion pumping polished rod.
Background technology
In petroleum industry, the oil pumper sucker rod pumping is a kind of artificial lift oil production method, and is simple with its equipment, small investment, and convenient management, advantage such as compliance is strong is extensively adopted by each oil field both at home and abroad.Oil pumper, sucker rod and oil well pump are three chief components of sucker rod pumping equipment, and wherein sucker rod is the motion and the transmission of power of oil pumper are carried out pumping to downhole pump parts.Oil pumping polish rod is the different sucker rod of rod string top one Gent, be used for and well head seal box fitted seal mouth of pumped oil well, therefore condition of work is more abominable than sucker rod, except that the condition of work of oil pumping polish rod, during upstroke in the exposed atmosphere in the open air, be immersed in during down stroke in the well liquid, therefore polished rod both had been subjected to atmospheric corrosion, be subjected to the well corrosion again, also to not bear high temperature when fuel-displaced, prestressing force that also will the side's of bearing clamp when hanging rod string bears the load tensile stress of the maximum that following all rod strings produce, and is the harshest different sucker rod of a Gent of condition of work.
At present domestic oil pumping polish rod is the same with sucker rod, is divided into C, K, D and H level from low to high according to different strength grades.Along with oil field development enters the middle and later periods, well depth increases gradually, load increases gradually, more and more higher to the mechanical property requirements of oil pumping polish rod.The 20CrMo steel is used in present sucker rod production more, and this sucker rod needs to quench and high tempering heat treatment in process of production, and production link is many, the cost of production height; This steel is mainly used in other sucker rods of low intensity level such as making D level, K level simultaneously, improves intensity by Technology for Heating Processing and makes the H grade pumping rod, and its reliability of products is not high.In addition, the oil extraction mode also changes polymer flooding, ternary composite driving into gradually from initial blowing, water drive, adds viscous crude high temperature in addition and recovers the oil, and has all aggravated the corrosion failure effect to oil pumping polish rod.Oil pumping polish rod causes with packing_seal not closely owing to corrosion causes the surface pitting corrosion to occur, causes leakage of oil, contaminated environment.The fatigue that corrosion failure effect has simultaneously aggravated oil pumping polish rod again reduces polished rod application life, causes polished rod to lose efficacy and stops well operations, lost units.
Summary of the invention
The purpose of this invention is to provide a kind of mechanical property, to reach present industry existing standard maximum intensity rank be the H level, fatigue strength substantially exceeds the preparation method of the super-high-strength anti-corrosion pumping polished rod of present petroleum industry standard simultaneously, and the oil pumping polish rod surface has anticorrosive wear-resistant and decreases coating, to prolong the application life of oil pumping polish rod under corrosive environment, to effectively slow down its corrosion failure effect by the oil pumping polish rod that uses this high strength, highly corrosion resistant, reduce accident rate, extend working time, improve output.
For achieving the above object, the present invention takes following design scheme: a kind of preparation method of super-high-strength anti-corrosion pumping polished rod is characterized in that it comprises the following steps:
One, the preparation of low-alloy structural Steel Bar During: according to following percentage by weight alloyage mixture of powders: carbon 0.06%～0.11%, silicon 0.60%～1.50%, manganese 1.60%～2.2%, chromium 0.90%～2.70%, molybdenum 0.20%～0.40%, nickel≤0.9%, copper≤0.20%, phosphorus≤0.025%, sulphur≤0.25%, surplus is an iron; Above-mentioned alloy powder mixing is smelted in electric furnace according to the prescription of body of rod matrix low-alloy structural steel, molten steel is poured into steel ingot; With the square embryo of above-mentioned steel ingot, adopt cooling controlling and rolling controlling process with tandem mill again with mill milling one-tenth: 1090 ℃ of heating-up temperatures, 900 ℃ of finishing temperatures, 3 ℃/s of cooling velocity becomes round steel with billet rolling, is cut into scale low-alloy structural Steel Bar During, and air cooling gets final product to room temperature;
Two, the preparation of oil pumping polish rod blank: the low-alloy structural Steel Bar During that obtains is arrived the oil pumping polish rod full-length with the drawbench cold-drawn, utilize the sucker rod straightener to carry out alignment again, utilize the hydraulic double cylinder upsetter to carry out the end jumping-up at the body of rod one end, use lathe that screw thread is carried out at the polished rod two ends then and be processed to form the oil pumping polish rod blank;
Three, the surface of oil pumping polish rod blank sprays: spray on the oil pumping polish rod blank with alloy powder with spraying and form alloy coat, spraying with the percentage by weight of alloy powder is: chromium 7%～10%, iron≤4%, silicon 2.0%～3.5%, boron 1.5%～2.5%, carbon≤0.4%, nickel 79.6%～85.1%;
Four, the oil pumping polish rod blank that will have above-mentioned alloy coat carries out the remelting cooling: utilize medium frequency induction heater that the 4th polished rod body of rod that obtains is carried out the surface induction heating, make the metal dust in the alloy coat fully melt mobile, in remelting, start the cooling water water pump, utilize the polished rod body of rod after the remelting that the cooling hydrosphere will stretch from medium frequency induction heater to lower the temperature rapidly;
Five, the tempering heat treatment of oil pumping polish rod: after polished rod is finished remelting and cooling, utilize medium frequency induction heater that the body of rod is carried out an average tempering heat treatment;
Six, oil pumping polish rod polishing: utilize the abrasive band to the polishing of oil pumping polish rod surface finish, making polished rod surface alloy coating layer thickness is 0.1mm～0.2mm scope, promptly obtains super-high-strength anti-corrosion pumping polished rod.
Each constituent content is definite as follows in the used steel of the body of rod:
Carbon: the super-strength sucker rod steel metallographic structure among the present invention mainly is bainite, ferrite and small portion of residual austenite, carbides-free exists mutually in the tissue, to avoid the pernicious effect of carbide to the bainitic steel mechanical property, thereby improve the mechanical property of bainitic steel, therefore the content of carbon is unsuitable too high, and carbon content is controlled in 0.06%～0.11% the scope among the present invention.
Molybdenum: molybdenum element does not almost influence bainite transformation because can effectively postpone high temperature transformation, so molybdenum is a bainite non-hardened and tempered steel alloying element commonly used.But costing an arm and a leg of molybdenum is from consider that economically reduce the content of molybdenum when design, molybdenum content is controlled in 0.20%～0.40% scope among the present invention as far as possible.
Manganese: manganese element mainly improves intensity by the solid solution carbon amount of solution strengthening effect, increase bainite, ferrite matrix.In addition, manganese and molybdenum are similar, can effectively postpone high temperature transformation.And manganese is quite cheap alloying element, has therefore added Gao Meng to reduce the consumption of molybdenum in steel.Manganese content is controlled in 1.60%～2.2% scope among the present invention.
Silicon: element silicon can hinder the formation of carbide strongly, makes steel not separate out (perhaps seldom separating out) carbide in the bainitic transformation process.In addition, silicon also is the essential element that improves yield strength.But excessive silicon reduces plasticity.The content of silicon is controlled in 0.60%～1.50% scope among the present invention.
Nickel: a spot of nickel element and manganese combine promptly can make steel easily produce bainite structure.The price of nickel is very high, considers from economic angle, uses nickel element less as far as possible.Among the present invention, nickel content≤0.9%
Chromium: the chromium element can improve the quenching degree of steel, and can make steel in cooling procedure the perlitic transformation district and bainite transformation distinguish from, help forming bainite.The content of chromium is controlled in 0.90%～2.70% the scope among the present invention.
Advantage of the present invention is:
1, super-high-strength anti-corrosion pumping polished rod of the present invention, its body of rod adopts low-alloy structural steel, makes body of rod tensile strength reach the H level by Technology for Heating Processing and surface heat spraying coating process and tempering heat treatment, and fatigue strength also arrives the petroleum industry standard greatly simultaneously.High strength adds the anti-fatigue performance of overlength, can effectively prolong the application life of oil pumping polish rod, reduces oil well operation number of times, improves oil well output.
2, the super-high-strength anti-corrosion pumping polished rod body of rod of the present invention surface is coated with one deck anticorrosive wear-resistant and decreases alloy coat.In the oil pumping polish rod course of work, this coating will have that the crude oil of corrosive medium and atmosphere and polished rod matrix are isolated to come, and make the bar matrix not be vulnerable to corrosion failure, thereby effectively prolong the application life of polished rod.
Description of drawings
Fig. 1 is a structural representation of the present invention
The specific embodiment
Embodiment one, the preparation method of super-high-strength anti-corrosion pumping polished rod of the present invention, and it comprises the following steps:
One, the preparation of low-alloy structural Steel Bar During: according to following percentage by weight alloyage mixture of powders: carbon 0.06%, silicon 0.60%, manganese 1.60%, chromium 0.90%, molybdenum 0.20%, nickel 0.9%, copper 0.20%, phosphorus 0.025%, sulphur 0.25%, surplus is an iron; The prescription of above-mentioned low-alloy structural steel is smelted in electric furnace, molten steel is poured into the steel ingot of 560kg.Become 65mmX65mm through Φ 650X1 with Φ 650X3 mill milling
2Square embryo after, adopt cooling controlling and rolling controlling process by Φ 400X1 and Φ 250X5 tandem mill again: 1090 ℃ of heating-up temperatures, 900 ℃ of finishing temperatures, 3 ℃/s of cooling velocity becomes Φ 30 round steel with billet rolling, is cut into the bar of 9 meters scales, air cooling gets final product to room temperature;
Two, the preparation of oil pumping polish rod blank: the low-alloy structural Steel Bar During that obtains is arrived oil pumping polish rod full-length 9.14m with the drawbench cold-drawn, utilize the GJ-A type sucker rod straightener of Huludao Bohai Petroleum Machinery Plant to carry out alignment again; Utilize the YSG-200 hydraulic double cylinder upsetter of the west of Liaoning, Huludao City oil facility factory to carry out the end jumping-up at the body of rod one end, use the C616 lathe that screw thread is carried out at the polished rod two ends then and be processed to form the oil pumping polish rod blank.
Three, the surface of oil pumping polish rod spraying: at first, the polished rod blank is passed the induction coil of the KGPS-160KW/8KHZ type medium frequency induction heater of Shanghai China instrument induction heating equipment Co., Ltd production, the two ends of plunger are fixed on plunger fixedly on the lathe by connecting rod, the chuck that has internal thread, and plunger fixedly lathe has the tumbler and the mobile device that can drive polished rod; The speed with 19mm/s～21mm/s moves to allow plunger rotate in the heater coil of medium frequency induction heater vertically with 190 rev/mins～210 rev/mins speed then, in first time moving process, closing Medium frequency induction equipment does not heat the body of rod, using belt grinder to be pressed in the polished rod surface that axially-movable with the 80# abrasive band polishes one time from the beginning to the end to the polished rod body of rod, reduce the about 0.1～0.2mm of body of rod diameter dimension on the one hand and reserve the thickness that anticorrosive wear-resistant decreases alloy coat, alligatoring body of rod surface is to improve the adhesive power of hot spray powder on the other hand.After finishing the polishing alligatoring, open medium frequency induction heater, allow polished rod oppositely move, make the surface from top to terminal successively by the heater coil preheating of medium frequency induction heater one time, during preheating, the power output of medium frequency induction heater remains on 19KW～21KW, with the moisture of removing plunger surface and the temperature that improves plunger surface, increase powder adhesive bond rate, avoid too much powder to impinge upon the bounce-back loss that is caused on the cold workpiece, be about to the medium frequency induction heater power-off after the preheating one time; The model that the polished rod body of rod of stretching from the heater coil end after being heated is simultaneously produced with auspicious the spray coating mechanical Co., Ltd in Shanghai at once is that the corrosion resisting alloy powder is gone up in the metal dust spray gun spraying of QT-E20000-7/h, the corrosion resisting alloy powder comprises the component of following weight ratio: chromium 7%, iron 1%, silicon 2.0%, boron 1.5%, carbon 0.1%, nickel 88.4%; Until the end that sprays to the polished rod body of rod, spraying is transported in the metal dust spray gun by air pump with alloy powder during spraying, and in the metal dust spray gun, mix the back with oxygen and acetylene and send from gun slot, the oxygen flow that wherein is transported to the metal dust spray gun is 0.39m
3/ h～0.41m
3/ h, acetylene flow are 0.79m
3/ h～0.81m
3/ h, the gas pressure of air pump are 0.023MPa～0.025Mpa; After polished rod body of rod terminal has been sprayed, the speed that the polished rod body of rod is being rotated in the heater coil of medium frequency induction heater vertically with 19mm/s～21mm/s with 190 rev/mins～210 rev/mins speed moves once more round about, and with the metal dust spray gun stopper rod body is sprayed second time; If having relatively high expectations, coating layer thickness sprays the 3rd time;
Four, the oil pumping polish rod blank that will have above-mentioned alloy coat carries out the remelting cooling: after finishing spraying, close spray gun, open the KGPS-160KW/8KHZ type medium frequency induction heater that Shanghai China instrument induction heating equipment Co., Ltd produces, the polished rod body of rod is carried out the surface induction heating, the power output of medium frequency induction heater remains on 108KW～112KW, the coil of the relative medium frequency induction heater of the polished rod body of rod rotates and rectilinear motion, the velocity of rotation of polished rod is 145 rev/mins～155 rev/mins, translational speed vertically is 13mm/s～15mm/s, and it is mobile that powder is fully melted; In remelting, start the cooling water water pump, the water that is cooled through the supercooled water circle time of the polished rod body of rod after the remelting of stretching from heater coil is lowered the temperature rapidly.
Five, the tempering heat treatment of oil pumping polish rod: after polished rod is finished remelting and cooling, the cooling water water pump cuts out, power output with medium frequency induction heater is adjusted to 33～37KW simultaneously, the coil of the relative medium frequency induction heater of the polished rod body of rod rotates and rectilinear motion, the velocity of rotation of polished rod is 145 rev/mins～155 rev/mins, translational speed vertically is 13mm/s～15mm/s, allow polished rod oppositely once more from first to last by the Frequency Induction Heating coil, make the body of rod carry out an average tempering heat treatment; By remelting, cooling and this motion back and forth of temper, polished rod has been finished face coat remelting and two technologies of body of rod heat treatment, on the one hand, this sprayed coating forms metallurgical binding by remelting processing and plunger matrix material, the composition of coating and the composition of matrix be mutual scattering and permeating in reflow process, between coating and matrix material, there is certain thickness transition region, the composition that makes coating arrive matrix changes slow relatively, avoided forming the interface of composition sudden change, also problem with regard to having avoided the electrodeposited chromium coating after defective appears in the surface, to cause the coating sheet to come off because of the expansion of corrosion, on the other hand, the polished rod body of rod cools off rapidly again to high temperature by eddy-current heating and passes through average tempering then, and make body of rod base material generation structural transformation, body of rod mechanical property reaches existing sucker rod maximum intensity rank H level after testing behind the cool to room temperature, and fatigue strength surpasses present petroleum industry standard significantly simultaneously.
Six, oil pumping polish rod polishing: finish remelting and the counter motion once more of heat treated polished rod, close Intermediate Frequency Induction Heating Equipment and water cooling equipment, open belt grinder and the polished rod surface finish is polished, make body of rod diameter reach standard-required with the 200# abrasive band.This moment, polished rod surface alloy coating layer thickness also reached 0.1mm～0.2mm scope, promptly obtained the super-high-strength anti-corrosion pumping polished rod finished product.
Embodiment two, the preparation method of super-high-strength anti-corrosion pumping polished rod of the present invention, and its making step is with embodiment one, difference is: make in the first step 1, that each chemical component weight percentage is in the used alloy powder mixture of low-alloy structural Steel Bar During: carbon 0.11%, silicon 1.50%, manganese 2.2%, chromium 2.70%, molybdenum 0.40%, nickel 0.9%, copper 0.20%, phosphorus 0.025%, sulphur 0.25%, surplus are iron; 2, each chemical component weight percentage is in the 3rd step body of rod surface corrosion resisting alloy coating: chromium 10%, iron 4%, silicon 3.5%, boron 2.5%, carbon 0.4%, nickel 79.6%.
Embodiment three, the preparation method of super-high-strength anti-corrosion pumping polished rod of the present invention, and its making step is with embodiment one, difference is: make in the first step 1, that each chemical component weight percentage is in the used alloy powder mixture of low-alloy structural Steel Bar During: carbon 0.08%, silicon 0.70%, manganese 1.70%, chromium 1.20%, molybdenum 0.25%, nickel 0.4%, copper 0.15%, phosphorus 0.02%, sulphur 0.20%, surplus are iron; 2, each chemical component weight percentage is in the 3rd step body of rod surface corrosion resisting alloy coating: chromium 8%, iron 1.5%, silicon 2.5%, boron 1.8%, carbon 0.15%, nickel 86.05%.
Embodiment three, the preparation method of super-high-strength anti-corrosion pumping polished rod of the present invention, and its making step is with embodiment one, difference is: make in the first step 1, that each chemical component weight percentage is in the used alloy powder mixture of low-alloy structural Steel Bar During: carbon 0.10%, silicon 1.30%, manganese 2.0%, chromium 2.40%, molybdenum 0.35%, nickel 0.7%, copper 0.17%, phosphorus 0.022%, sulphur 0.22%, surplus are iron; 2, each chemical component weight percentage is in the 3rd step body of rod surface corrosion resisting alloy coating: chromium 9%, iron 3.4%, silicon 3.1%, boron 2.2%, carbon 0.34%, nickel 81.96%.
Super-high-strength anti-corrosion pumping polished rod by the present invention's making, as shown in Figure 1, it is a kind of flexible stock, there is the external screw thread 1,4 that can be connected with rod collar at the two ends of the body of rod 3, one end of the body of rod 3 closes on the external screw thread place and has pier thick 5, be coated with one deck anticorrosive wear-resistant at the polished rod external surface and decrease alloy coat 2, the thickness of body of rod surface corrosion resisting alloy coating 2 is 0.1～0.2mm.If the thickness of corrosion-resistant finishes 2, then can not guarantee the normal wear consumption of oil pumping polish rod in the normal use age fully less than 0.1mm.
The mechanical property of the super-high-strength anti-corrosion pumping polished rod that embodiment one, two, three, four makes sees Table one.
The mechanical property of each embodiment of table one super-high-strength anti-corrosion pumping polished rod
| Tensile strength sigma bMPa | Yield strength σ sMPa | Elongation rate δ s% | Contraction percentage of area ψ % | Ballistic work A kJ | Fatigue strength σ 0.1 | |
| SY/T5029-2003H grade pumping rod standard SY/T6272-1997 sucker rod fatigue strength standard | 966～1136 | 〉=865 | 〉=10 | 〉=50 | 〉=58.8 | Under the 540MPa sinusoidal wave load during load ratio R=0.1, circulation cycle 〉=1 * 10 6Inferior. |
| Embodiment one | 1640 | 1082 | 12.5 | 52.5 | 86 | 9.132 * 10 6 |
| Embodiment two | 1625 | 1091 | 16 | 54 | 89 | 1.126 * 10 7 |
| Embodiment three | 1610 | 1100 | 19.5 | 54.5 | 85 | 1.121 * 10 7 |
| Embodiment four | 1615 | 1094 | 14 | 51 | 79 | 9.635 * 10 6 |
Claims (1)
1, a kind of preparation method of super-high-strength anti-corrosion pumping polished rod is characterized in that, it comprises the following steps:
One, the preparation of low-alloy structural Steel Bar During: according to following percentage by weight alloyage mixture of powders: carbon 0.06%～0.11%, silicon 0.60%～1.50%, manganese 1.60%～2.2%, chromium 0.90%～2.70%, molybdenum 0.20%～0.40%, nickel≤0.9%, copper≤0.20%, phosphorus≤0.025%, sulphur≤0.25%, surplus is an iron; Above-mentioned alloy powder mixing is smelted in electric furnace according to the prescription of body of rod matrix low-alloy structural steel, molten steel is poured into steel ingot; With the square embryo of above-mentioned steel ingot, adopt cooling controlling and rolling controlling process with tandem mill again with mill milling one-tenth: 1090 ℃ of heating-up temperatures, 900 ℃ of finishing temperatures, 3 ℃/s of cooling velocity becomes round steel with billet rolling, is cut into scale low-alloy structural Steel Bar During, and air cooling gets final product to room temperature;
Two, the preparation of oil pumping polish rod blank: the low-alloy structural Steel Bar During that obtains is arrived the oil pumping polish rod full-length with the drawbench cold-drawn, utilize the sucker rod straightener to carry out alignment again, utilize the hydraulic double cylinder upsetter to carry out the end jumping-up at the body of rod one end, use lathe that screw thread is carried out at the polished rod two ends then and be processed to form the oil pumping polish rod blank;
Three, the surface of oil pumping polish rod blank sprays: spray on the oil pumping polish rod blank with alloy powder with spraying and form alloy coat, spraying with the percentage by weight of alloy powder is: chromium 7%～10%, iron≤4%, silicon 2.0%～3.5%, boron 1.5%～2.5%, carbon≤0.4%, nickel 79.6%～85.1%;
Four, the oil pumping polish rod blank that will have above-mentioned alloy coat carries out the remelting cooling: utilize medium frequency induction heater that the 4th polished rod body of rod that obtains is carried out the surface induction heating, make the metal dust in the alloy coat fully melt mobile, in remelting, start the cooling water water pump, utilize the polished rod body of rod after the remelting that the cooling hydrosphere will stretch from medium frequency induction heater to lower the temperature rapidly;
Five, the tempering heat treatment of oil pumping polish rod: after polished rod is finished remelting and cooling, utilize medium frequency induction heater that the body of rod is carried out an average tempering heat treatment;
Six, oil pumping polish rod polishing: utilize the abrasive band to the polishing of oil pumping polish rod surface finish, making polished rod surface alloy coating layer thickness is 0.1mm～0.2mm scope, promptly obtains super-high-strength anti-corrosion pumping polished rod.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101146913A CN1952344A (en) | 2006-11-21 | 2006-11-21 | Method for making super-high-strength anti-corrosion pumping polished rod |
| CN200710188009XA CN101187295B (en) | 2006-11-21 | 2007-11-21 | Super high intensity anti-corrosion pumping rod production method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101146913A CN1952344A (en) | 2006-11-21 | 2006-11-21 | Method for making super-high-strength anti-corrosion pumping polished rod |
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| CN1952344A true CN1952344A (en) | 2007-04-25 |
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| CNA2006101146913A Pending CN1952344A (en) | 2006-11-21 | 2006-11-21 | Method for making super-high-strength anti-corrosion pumping polished rod |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061369A (en) * | 2011-01-24 | 2011-05-18 | 南通宝钢钢铁有限公司 | Method for preparing chloride ion corrosion resistant quake-proof bar |
| CN101571033B (en) * | 2009-05-26 | 2011-08-17 | 铁岭米勒石油新材料有限公司 | Polished sucker rod |
| CN104313479A (en) * | 2014-09-30 | 2015-01-28 | 东营咸亨工贸有限公司 | Corrosion-resistant sucker rod and manufacturing method thereof |
| CN110079738A (en) * | 2019-05-29 | 2019-08-02 | 包头钢铁（集团）有限责任公司 | A kind of high-strength American Standard rare earth sucker rod round steel and preparation method thereof |
| CN110273101A (en) * | 2019-06-14 | 2019-09-24 | 首钢集团有限公司 | A kind of H grade pumping rod and preparation method thereof |
| CN111550196A (en) * | 2020-05-10 | 2020-08-18 | 北京工商大学 | Bending fatigue resistant steel oil pumping polished rod and processing technology thereof |
-
2006
- 2006-11-21 CN CNA2006101146913A patent/CN1952344A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101571033B (en) * | 2009-05-26 | 2011-08-17 | 铁岭米勒石油新材料有限公司 | Polished sucker rod |
| CN102061369A (en) * | 2011-01-24 | 2011-05-18 | 南通宝钢钢铁有限公司 | Method for preparing chloride ion corrosion resistant quake-proof bar |
| CN102061369B (en) * | 2011-01-24 | 2012-10-03 | 南通宝钢钢铁有限公司 | Method for preparing chloride ion corrosion resistant quake-proof bar |
| CN104313479A (en) * | 2014-09-30 | 2015-01-28 | 东营咸亨工贸有限公司 | Corrosion-resistant sucker rod and manufacturing method thereof |
| CN110079738A (en) * | 2019-05-29 | 2019-08-02 | 包头钢铁（集团）有限责任公司 | A kind of high-strength American Standard rare earth sucker rod round steel and preparation method thereof |
| CN110273101A (en) * | 2019-06-14 | 2019-09-24 | 首钢集团有限公司 | A kind of H grade pumping rod and preparation method thereof |
| CN111550196A (en) * | 2020-05-10 | 2020-08-18 | 北京工商大学 | Bending fatigue resistant steel oil pumping polished rod and processing technology thereof |
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