CN102373374A - High strength sulfur resisting casing pipe and its heat treatment manufacturing method - Google Patents
High strength sulfur resisting casing pipe and its heat treatment manufacturing method Download PDFInfo
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Abstract
The invention relates to a high strength sulfur resisting casing pipe, which comprises the following chemical components: 0.25-0.35 wt% of C, 0.1-0.5 wt% of Si, 0.4-0.6 wt% of Mn, 0.1-0.6 wt% of Cr, 0.2-0.6 wt% of Mo, 0.03-0.15 wt% of V, less than 0.015 wt% of P, less than 0.010 wt% of S, and the balance Fe as well as inevitable impurity elements. In the invention, when a steel pipe is rolled, a quenching and tempering heat treatment is carried out twice. The quenching and tempering heat treatment comprises the steps of: during the first quenching and tempering heat treatment, keeping a heating temperature of 900DEG C-1000DEG C before quenching, conducting heat preservation for 45min-120min, then spraying water for quenching, and carrying out tempering at a temperature of 670DEG C-710DEG C, performing thermal insulation for 90min-150min, air cooling the pipe when taken out of a furnace; during the second tempering treatment, keeping a heating temperature of 850DEG C-950DEG C before quenching, conducting heat preservation for 45min-120min, then spraying water for quenching, and carrying out tempering at a temperature of 650DEG C-710DEG C, performing thermal insulation for 90min-150min, and air cooling the pipe when taken out of the furnace.
Description
Technical field
The present invention relates to a kind of seamless tubing and casing and thermal treatment method of manufacture thereof of economical high-strength hydrogen-sulfide environmental corrosion-resistant.
Background technology
Hydrogen sulfide is a kind of sour gas that in oil-gas exploration and mining process, often runs into.Along with the continuous growth of world energy sources demand, the less hydrocarbon resources of development difficulty is petered out, and people have to begin to develop the more abominable deep-well of geologic condition, ultra deep well, and often all contain hydrogen sulfide in these oil gas wells.In the existing fld in the world about 1/3 all contains hydrogen sulfide.
Acid cure hydrogen in the oil gas well can make ferrous materials generation sulfide-stress cracking (Sulfide Stress Cracking).(High Strength Low Alloy Steel shows particularly outstandingly in HSLA) this problem at high-strength low-alloy steel.Because the hydrogen sulfide corrosion resistance of oil well pipe can be directly connected to oil field equipment and personnel's safety, so the sulfur resistance of high-strength low-alloy steel becomes the problem that each oil well pipe manufacturing enterprise and oil field user pay close attention to.The oil company removes when steel pipe is purchased and requires product to satisfy API Std (American Petroleum Institute; API) outside; Also often have the requirement of hydrogen sulfide corrosion resistance ability; Promptly require steel pipe to meet the standard of NACE MR0175, and carry out SSCC (Sulfide Stress Corrosion Cracking) by NACE TM0177 standard and test with material.
Along with the increase of well depth, the temperature and pressure of down-hole also increases.The deep-well of HTHP and ultra deep well are had higher requirement to the use properties of oil well pipe: both required oil well pipe to have very high intensity to bear huge pressure in down-hole and weight, had certain hydrogen sulfide corrosion resistance ability simultaneously again.As far as the oil field user, the intensity through the anti-sulphur oil well pipe of further raising material can satisfy the requirement to use properties under the condition that does not increase the oil well pipe wall thickness, thereby use for user's scene great facility is provided.Therefore, in recent years on the market to the demand of the anti-sulphur pipe of HS always in strong growth.
In decades in the past, the production technology of the anti-sulphur pipe of HS has obtained the development of advancing by leaps and bounds.Its minimum nominal ys (Specified Minimum Yield Strength) is brought up to 110ksi (758MPa) from 80ksi (552MPa), 90ksi (621MPa), 95ksi (655MPa) always.API takes in the anti-sulphur pipe of 90 and 95 grade of steels in the API 5CT/ISO11960 standard, and difference called after C90 and T95.The anti-sulphur pipe of 100 and 110 grade of steels is revenue standard not also, but is commonly referred to as C100 and C110.Only before 20 years, the production that has the oil well pipe of HS and high hydrogen sulfide corrosion resistance ability simultaneously also is considered to impossible thing, and the anti-sulphur pipe of 110 grade of steels also just began to occur in the nearly more than ten years.2004, the anti-sulphur sleeve pipe of 125 grade of steels was successfully produced in SUMITOMO CHEMICAL metal company and BP and Statoil cooperation.These series product can also guarantee certain hydrogen sulfide corrosion resistance ability except having the minimum nominal ys up to 125ksi.This is the maximum intensity level that present high steel grade sulfur resistant sleeve pipe in the world can reach.Along with developing rapidly of modern material science and metallurgical technology; Possess simultaneously HS and high hydrogen sulfide corrosion resistance can oil well pipe can carry out large-scale industrial production now and be widely applied in the production of hydrocarbons all over the world, and the intensity rank of high steel grade sulfur resistant pipe also has the trend that further improves.
The high steel grade sulfur resistant sleeve pipe is had relatively high expectations to use properties, not only requires material to have very high intensity, also requires to have certain hydrogen sulfide corrosion resistant ability simultaneously.For high intensity oil casing tube; Higher intensity will restrict its application in hydrogen-sulfide environmental; Because as far as high steel grade oil sleeve pipe intensity and a pair of often contradiction of sulfur resistance; Higher intensity generally can cause the reduction of sulfur resistance, and in order to obtain higher sulfur resistance, just must sacrifice the certain intensity index.Therefore, in the process of design of alloy and process system formulation, must take into account the demand of the two, balance between intensity and sulfur resistance.In order to obtain higher intensity and sulfur resistance simultaneously; Must control accurately and optimize the microtexture evolutionary process of material; Make it in the alloy phase change process, give full play to the effect of grain refining, precipitation strength and raising resistance to tempering; And combine with the rational heat treatment system, reach through reasonable use trace alloying element and make the maximized purpose of performance strengthening effect.
What the key of exploitation HS anti-sulphur tubing and casing material was how rationally to control alloy carbide separates out form and the amount of separating out to reach best precipitating reinforcing effect and to improve the sulfur resistance of material.In the high-strength Cr-Mo steel alloy, the thick carbide such as the M that near crystal boundary, separate out
23C
6, M
3C etc. tend in loading process, become the rimose thin spot take place, and cause the intergranular corrosion rimose to take place, and directly influence the sulfur resistance of material.Therefore, through adding trace alloying element and take the rational heat treatment system to suppress thick carbide and separate out, and make tiny carbide be the disperse uniform distribution, can effectively improve the anti intercrystalline corrosion cracking ability of Cr-Mo steel, improve its sulfur resistance.Trace alloying element in the steel is not to play a role separately, therefore in the middle of the use of reality, often adopts the mode of compound interpolation, in the hope of obtaining best strengthening effect with less alloy adding, reaches cost-benefit maximization.Adopting rational Cr-Mo is steel grade, and adds alloying elements such as V, Nb, Ti, can when guaranteeing mechanical property, make material have good sulfur resistance.
Aspect Design of Heat Treatment Process, high-temperature tempering process is generally adopted in the production of the anti-sulphur pipe of HS.The form and the tempering temperature of carbide have confidential relation.When the lesser temps tempering, M
3The form of C carbide is mainly needle-like or lensing and is distributed in crystal boundary, becomes the starting point that intergranular corrosion cracking takes place, and is deleterious to the sulfur resistance of crystal boundary.And through high tempering, M
3Nodularization can take place in the C carbide, and the distribution in material disperse is even more, thereby improved the corrosion resistance at crystal boundary place.In addition, also can make the martensitic stucture after the quenching fully change the tempered sorbite tissue into, eliminate and organize internal stress, reduce dislocation desity, obtain uniform and stable microstructure through high tempering.Because dislocation desity is low, metastable organization is few, so it is also less to help the passage of Wasserstoffatoms diffusion, its hydrogen sulfide corrosion resistance can be better through the stabilizing tissue behind the high tempering.In order further to improve the corrosion resistance of anti-sulphur pipe; Each manufacturer has developed the heat treating method of own uniqueness separately; Can effectively reduce the uneven distribution of element in the material; Crystal grain thinning and alloy carbide, thus evenly tiny ferritic+alloy carbide tissue obtained, improve the hydrogen sulfide corrosion resistance ability of material.
Have at present and introduce the above anti-sulphur pipe of 125ksi grade of steel and the prior art of method for manufacturing thereof; Open flat 8-311551 communique like the spy; Te Kaiping 11-335731 communique, the spy opens the 2000-178682 communique, and the spy opens the 2000-256783 communique; The spy opens the 2000-297344 communique, and the spy opens the 2000-119798 communique.
Adopted direct quenching method in the disclosed technology of Te Kaiping 8-311551 communique.Through heat, make alloying elements such as Nb, V fully dissolve in the austenite structure direct quenching after the thermal distortion.In drawing process subsequently, the Nb of solid solution, V separate out on matrix with the form of tiny carbide, produce the intensive precipitating reinforcing effect, thereby reach the purpose that improves mechanical property.Gone out the anti-sulphur tubing and casing product of intensity rank through this explained hereafter at 110-140ksi.
The disclosed technology of Te Kaiping 11-335731 communique has gone out the anti-sulphur tubing and casing product of intensity rank at 110-140ksi through the optimization production to alloying constituent.
The spy opens the 2000-178682 communique, the spy opens in 2000-256783 communique and the disclosed technology of Te Kai 2000-297344 communique and produced the anti-sulphur tubing and casing product of intensity rank at 110-140ksi through the method for control carbide morphology.
The spy opens and adopts the method for separating out tiny V carbide in a large number to produce the anti-sulphur tubing and casing product of intensity rank at 110-140ksi in the disclosed technology of 2000-119798 communique.
The heat treatment mode of anti-sulphur pipe product is mainly taked modified thermal treatment, and all there is bigger difficulty in special opening in the big at the scene productions enforcements of technology such as flat disclosed induction heating of 8-311551 communique and direct quenching in the above technology.
Te Kaiping 11-335731 communique, spy open that 2000-178682 communique, spy are opened the 2000-256783 communique, the spy opens in 2000-297344 communique and the disclosed technology of Te Kai 2000-119798 communique and adopted traditional quenching-and-tempering process; The YIELD STRENGTH scope has contained 110～140ksi; Its variation range is wide, has exceeded the lower limit of 125ksi grade of steel.All adopted the B element to improve hardening capacity in the above technology.But must add Ti to prevent producing fragility BN after adding B, increase the control difficulty of smelting and the fluctuation of material property.In addition, more than also adopted in the alloy designs of technology alloying elements such as Nb, Ti, W, Zr with the resistance to tempering that improves material with strengthen precipitating reinforcing effect, improved cost of alloy greatly.
The modified treatment production method of manufacture of the secondary of introducing ferrous materials is both at home and abroad also arranged; " thermal treatment process of sulfur resistant drill pipe joint " like CN200510130669.3; " the HEAT TREATMENT OF STAINLESS STEEL " of JP60-063315A, " a kind of high-temperature antiwear alloy steel and the working method thereof " of CN00113555.4.
Wherein, JP60-063315A and CN00113555.4 are stainless steel and the wear resisting steels that is applied to high alloy content, are main purpose to improve its intensity and wear resisting property.The described secondary quenching-and-tempering process of CN200510130669.3 is applied to the production of low-alloy sulfur resistant drill pipe joint, is main purpose with the hardening capacity that improves big wall thickness joint.This method is the quenching means with the oil quenching.Do not see that so far it is means that shrend is arranged, adopt the patent documentation report of the modified treatment production low-alloy of secondary anti-corrosion seamless steel tube.
Summary of the invention
The present invention is through proposing the anti-sulphur telescopic of a kind of HS thermal treatment method of manufacture, solved the sulfur-bearing ultra deep well and used the material problem with HS hydrogen sulfide corrosion resistant tubing and casing.Alloying constituent through the appropriate design material; And carry out second heat treatment technology; When guaranteeing high steel grade sulfur resistant pipe corrosion resistance; Can significantly reduce the alloy usage quantity of anti-sulphur tube material, cancel alloys such as Nb, Ti, W, Zr and added element, produce minimum nominal ys more than 125ksi and have a tubing and casing of good corrosion resistance.
The object of the present invention is to provide a kind of production to have the thermal treatment method of manufacture of the tubing and casing of good hydrogen sulfide corrosion resistance ability.
The anti-sulphur shell material of HS produced according to the invention has following chemical ingredients (wt%):
C:0.25～0.35wt%, Si:0.1～0.5wt%, Mn:0.4～0.6wt%; Cr:0.1～0.6wt%, Mo:0.2～0.6wt%, V:0.03～0.15wt%; P＜0.015wt%, S＜0.010wt%, all the other are Fe and unavoidable impurities element.
The anti-sulphur shell material of HS generally adopts the Cr-Mo alloy system to guarantee good hardening capacity and temper resistance.The low Mo alloy designs of the low Cr of low Mn of steel employing economy of the present invention adopt the trace V alloy to carry out the intensity rank of precipitation strength with further raising material, and deleterious S, P constituent content in the steel is controlled in strictness.
Compare with anti-sulphur tube material before; Because grain refining effect and precipitating reinforcing effect that the modified thermal treatment of secondary brings; Adopt the alloy usage quantity of the anti-sulphur tube material of explained hereafter of the present invention obviously to reduce, and cancelled the adding of the alloying element of costlinesses such as Nb, significantly reduced production cost.
According to the present invention, carry out 2 modified thermal treatment behind the steel pipe rolling.Modified heat treated concrete technology is following:
Heating temperature before quenching is 900 ℃-1000 ℃, insulation 45min-120min, spray quenching.Tempering temperature is 670 ℃-710 ℃, insulation 90min-150min, the back air cooling of coming out of the stove.
The 1st modified heat treated main purpose is the microstructure of adjustment material, fully dissolves alloying element, is that the 2nd modified thermal treatment is ready in the material metallographic structure.Heating temperature before quenching is 930 ℃-1000 ℃, insulation 45min-120min, spray quenching.Tempering temperature is 570 ℃-650 ℃, insulation 90min-150min, the back air cooling of coming out of the stove.V carbide in the anti-sulphur pipe is even and tiny, mainly with M
3The form of C and MC exists.The carbide of V has dystectic characteristics, need under than higher temperature condition, just can dissolve to get in the austenite.It is insufficient to be lower than 930 ℃ of austenitizings, has hot rolling microstructure to exist, and influences sulfur resistance and mechanical property.Being higher than 1000 ℃ or soaking time surpasses 120min and then the phenomenon that austenite crystal is grown up can occur, infringement hydrogen sulfide corrosion resistance ability.The heat tracing time before quenching fully dissolves in the austenite alloying element in the steel more than 45min, obtains single-phase martensite tissue as much as possible to guarantee the quenching back.The quenched martensite of steel is organized many more, and the microstructure after the tempering is even more, and its hydrogen sulfide corrosion resistance can be good more.Tempering temperature should be higher than 570 ℃, to guarantee that quenched martensite can decompose, obtains evenly tiny tempered sorbite tissue.
In the 2nd modifier treatment, the Heating temperature before quenching is 850 ℃-950 ℃, insulation 45min-120min, spray quenching.Tempering temperature is 650 ℃-710 ℃, insulation 90min-150min, the back air cooling of coming out of the stove.In the 2nd the modified thermal treatment; Again dissolve in tiny alloy carbide in the austenite structure through austenitizing once more; But because the 1st modified thermal treatment distributes a large amount of disperses of tiny carbide; Dystectic alloy carbides such as a part of Mo, V can be remained on the high temperature austenite matrix, have stoped growing up of austenite crystal in the insulating process, effectively refinement grain structure.After the 2nd modified thermal treatment, can obtain more evenly tiny microstructure, further improved the homogeneity of material, guarantee the good corrosion resistance of the anti-sulphur pipe of HS.Through giving full play to crystal grain thinning and the precipitation strength effect of material interalloy element in thermal treatment; Can reduce the usage quantity of alloying element, formation macrobead shape carbide damages corrosion resistance on austenitic matrix because of can not fully dissolving to avoid too much alloying element.
Hot straightening temperature after the tempering should be higher than 480 ℃, to reduce the unrelieved stress that produces because of aligning, helps improving the sulfur resistance of material.
Steel grade of the present invention can reach after tube rolling and thermal treatment: ys: Rt0.65 >=862MPa; Tensile strength: Rm >=932MPa; Unit elongation: A50.8 >=19%; Impelling strength: vertical Akv >=90J; Horizontal Akv >=90J; Hydrogen sulfide corrosion resistance can be excellent.
Description of drawings
Fig. 1 is the grain fineness number of the 125ksi steel grade sulfur resistant pipe of explained hereafter of the present invention.
Fig. 2 is the grain fineness number of the 125ksi steel grade sulfur resistant pipe of traditional technology (promptly once modified thermal treatment) production.
Embodiment
Below through specific embodiment the present invention is carried out comparatively detailed explanation.
Table 1 is the chemical ingredients of embodiments of the invention and comparative example.
Embodiment 1
Chemical ingredients by in the table 1 is smelted, and the 1st modifier treatment carried out in cast and rolling then, and wherein, the Heating temperature before quenching is 930 ℃, insulation 45min, spray quenching.Tempering temperature is 570 ℃, insulation 90min, the back air cooling of coming out of the stove.Carry out the 2nd modifier treatment again, wherein, the Heating temperature before quenching is 850 ℃, insulation 45min, spray quenching.Tempering temperature is 650 ℃, insulation 90min, the back air cooling of coming out of the stove.
Table 1, the chemical ingredients of embodiments of the invention and comparative example, wt%
| C | Si | Mn | Cr | Mo | V | Nb | Ti | P | S | |
| Embodiment 1 | 0.25 | 0.1 | 0.4 | 0.1 | 0.2 | 0.03 | - | - | ＜0.015 | ＜0.01 |
| Embodiment 2 | 0.3 | 0.25 | 0.5 | 0.25 | 0.4 | 0.05 | - | - | ＜0.015 | ＜0.01 |
| Embodiment 3 | 0.27 | 0.35 | 0.6 | 0.45 | 0.6 | 0.15 | - | - | ＜0.015 | ＜0.01 |
| Embodiment 4 | 0.35 | 0.5 | 0.5 | 0.6 | 0.5 | 0.10 | - | - | ＜0.015 | ＜0.01 |
| Comparative example 1 | 0.30 | 0.42 | 1.0 | 1.0 | 0.8 | 0.03 | 0.03 | - | ＜0.015 | ＜0.01 |
| Comparative example 2 | 0.30 | 0.42 | 0.5 | 1.0 | 0.85 | 0.03 | 0.03 | 0.03 | ＜0.015 | ＜0.01 |
Embodiment 2
According to chemical ingredients in the table 1 smelt, cast and rolling, carry out the 1st modifier treatment then, wherein, the Heating temperature before quenching is 1000 ℃, insulation 120min, spray quenching.Tempering temperature is 650 ℃, insulation 150min, the back air cooling of coming out of the stove.Carry out the 2nd modifier treatment again, wherein, the Heating temperature before quenching is 950 ℃, insulation 120min, spray quenching.Tempering temperature is 710 ℃, insulation 150min, the back air cooling of coming out of the stove.
Embodiment 3
Chemical ingredients according in the table 1 is smelted, cast and rolling, carries out the 1st modifier treatment then, and wherein, the Heating temperature before quenching is 930 ℃, insulation 45min, spray quenching.Tempering temperature is 570 ℃, insulation 90min, the back air cooling of coming out of the stove.Carry out the 2nd modifier treatment again, wherein, the Heating temperature before quenching is 950 ℃, insulation 120min, spray quenching.Tempering temperature is 710 ℃, insulation 150min, the back air cooling of coming out of the stove.
Embodiment 4
Chemical ingredients according in the table 1 is smelted, cast and rolling, carries out the 1st modifier treatment then, and wherein, the Heating temperature before quenching is 1000 ℃, insulation 120min, spray quenching.Tempering temperature is 650 ℃, insulation 150min, the back air cooling of coming out of the stove.Carry out the 2nd modifier treatment again, wherein, the Heating temperature before quenching is 850 ℃, insulation 45min, spray quenching.Tempering temperature is 650 ℃, insulation 90min, the back air cooling of coming out of the stove.
Comparative example 1
Chemical ingredients according in the table 1 is smelted, cast and rolling, carries out modifier treatment then, and wherein, the Heating temperature before quenching is 930 ℃, insulation 45min, spray quenching.Tempering temperature is 700 ℃, insulation 90min, the back air cooling of coming out of the stove.
Comparative example 2
Chemical ingredients according in the table 1 is smelted, cast and rolling, carries out modifier treatment then, and wherein, the Heating temperature before quenching is 930 ℃, insulation 45min, spray quenching.Tempering temperature is 690 ℃, insulation 120min, the back air cooling of coming out of the stove.
Fig. 1 contrasts for the grain fineness number tissue of the 125ksi steel grade sulfur resistant pipe that adopts the present invention and produce and traditional 125ksi steel grade sulfur resistant pipe.Visible by Fig. 1, anti-sulphur pipe of the present invention has more evenly tiny grain structure, and grain fineness number has improved more than 3 grades.
Table 2 contrasts with sulfur resistance for the mechanical property of the 125ksi steel grade sulfur resistant pipe that adopts the present invention and produce and traditional 125ksi steel grade sulfur resistant pipe.
The performance comparison of table 2 technology of the present invention and traditional technology
H: hour
Hydrogen sulfide corrosion resistance ability: press the A method of NACE TM0177 standard, in the A solution that feeds saturated hydrogen sulfide, apply the immersion of 80%SMYS load and do not ftracture in 720 hours.
Visible by table 2; Though the intensity of the 125ksi steel grade sulfur resistant pipe that traditional material and thermal treatment process are produced has all reached the 125ksi grade of steel, because the metallographic structure of the 125 steel grade sulfur resistant pipes that traditional technology is produced is inhomogeneous, crystal grain is thicker; Impelling strength is lower, and sulfur resistance is also undesirable; According to the present invention the anti-sulphur tube material of HS is carried out rational modified thermal treatment, can produce minimum nominal ys more than 125ksi and have good hydrogen sulfide corrosion resistance can tubing and casing.The anti-sulphur sleeve pipe of the HS of being produced can be widely used in deep-well, the ultra deep well probing mining operations of sulfur-bearing, has very wide application prospect.
Claims (4)
1. anti-sulphur sleeve pipe of HS, its chemical ingredients by weight percentage is:
C:0.25-0.35wt%, Si:0.1-0.5wt%, Mn:0.4-0.6wt%, Cr:0.1-0.6wt%, Mo:0.2-0.6wt%, V:0.03-0.15wt%, P＜0.015wt%, S＜0.010wt%, all the other are Fe and unavoidable impurities element;
After being rolled into steel pipe, carry out twice modified thermal treatment;
In the modified thermal treatment for the first time, the Heating temperature before quenching is 900 ℃-1000 ℃, insulation 45min-120min, spray quenching.Tempering temperature is 670 ℃-710 ℃, insulation 90min-150min, the back air cooling of coming out of the stove;
In the modifier treatment for the second time, the Heating temperature before quenching is 850 ℃-950 ℃, insulation 45min-120min, spray quenching.Tempering temperature is 650 ℃-710 ℃, insulation 90min-150min, the back air cooling of coming out of the stove.
2. the anti-sulphur sleeve pipe of HS as claimed in claim 1 is characterized in that, after the thermal treatment second time, carries out hot straightening being higher than 480 ℃.
3. the anti-sulphur sleeve pipe of HS as claimed in claim 2 is characterized in that, after the thermal treatment second time, carries out hot straightening at 480-580 ℃.
4. like the anti-sulphur sleeve pipe of each described HS of claim 1～3, it is characterized in that the anti-sulphur telescopic of said HS ys Rt0.65 >=862MPa; Tensile strength >=932MPa; Unit elongation >=19%, impelling strength are vertical Akv >=90J, laterally Akv >=90J.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103243202A (en) * | 2013-04-16 | 2013-08-14 | 东营信盛机械有限公司 | Thermal treatment processing technology for transmission shaft of petroleum drilling and production equipment |
| CN104480278A (en) * | 2014-12-24 | 2015-04-01 | 江苏隆盛钻采机械制造有限公司 | Thermal processing process for oil casing pup joint |
| CN105063324A (en) * | 2015-09-08 | 2015-11-18 | 天津钢管集团股份有限公司 | Heat treatment method of high-strength hydrogen-sulfide-corrosion-resistant seamless steel tube for oil wells |
| CN105177434A (en) * | 2015-09-25 | 2015-12-23 | 天津钢管集团股份有限公司 | Manufacturing method of 125ksi steel grade hydrogen-sulfide-stress-corrosion-resistant oil well pipe |
| WO2019242448A1 (en) * | 2018-06-20 | 2019-12-26 | 宝山钢铁股份有限公司 | 125ksi steel grade sulfur-resistant oil well pipe and fabrication method therefor |
| CN113817898A (en) * | 2021-07-12 | 2021-12-21 | 承德建龙特殊钢有限公司 | Method for improving structure performance of chromium-molybdenum steel |
| CN115386808A (en) * | 2022-09-28 | 2022-11-25 | 延安嘉盛石油机械有限责任公司 | Corrosion-resistant oil casing pipe and preparation method and application thereof |
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| CN1924068A (en) * | 2005-08-30 | 2007-03-07 | 宝山钢铁股份有限公司 | Oil well tube resisting stress corrosion of H2S and manufacture method thereof |
| CN1986843A (en) * | 2005-12-20 | 2007-06-27 | 渤海能克钻杆有限公司 | Heat treatment process of sulfur resistant drill pipe joint |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103243202A (en) * | 2013-04-16 | 2013-08-14 | 东营信盛机械有限公司 | Thermal treatment processing technology for transmission shaft of petroleum drilling and production equipment |
| CN104480278A (en) * | 2014-12-24 | 2015-04-01 | 江苏隆盛钻采机械制造有限公司 | Thermal processing process for oil casing pup joint |
| CN105063324A (en) * | 2015-09-08 | 2015-11-18 | 天津钢管集团股份有限公司 | Heat treatment method of high-strength hydrogen-sulfide-corrosion-resistant seamless steel tube for oil wells |
| CN105177434A (en) * | 2015-09-25 | 2015-12-23 | 天津钢管集团股份有限公司 | Manufacturing method of 125ksi steel grade hydrogen-sulfide-stress-corrosion-resistant oil well pipe |
| CN105177434B (en) * | 2015-09-25 | 2017-06-20 | 天津钢管集团股份有限公司 | The manufacture method of 125ksi grade of steel sulfurated hydrogen stress etching-resisting oil well pipes |
| WO2019242448A1 (en) * | 2018-06-20 | 2019-12-26 | 宝山钢铁股份有限公司 | 125ksi steel grade sulfur-resistant oil well pipe and fabrication method therefor |
| CN113817898A (en) * | 2021-07-12 | 2021-12-21 | 承德建龙特殊钢有限公司 | Method for improving structure performance of chromium-molybdenum steel |
| CN115386808A (en) * | 2022-09-28 | 2022-11-25 | 延安嘉盛石油机械有限责任公司 | Corrosion-resistant oil casing pipe and preparation method and application thereof |
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