CN106011657A - 110Ksi steel grade hydrogen sulfide stress corrosion-resistant steel pipe for oil well and production method thereof - Google Patents
110Ksi steel grade hydrogen sulfide stress corrosion-resistant steel pipe for oil well and production method thereof Download PDFInfo
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- CN106011657A CN106011657A CN201610482225.4A CN201610482225A CN106011657A CN 106011657 A CN106011657 A CN 106011657A CN 201610482225 A CN201610482225 A CN 201610482225A CN 106011657 A CN106011657 A CN 106011657A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 87
- 239000010959 steel Substances 0.000 title claims abstract description 87
- 239000003129 oil well Substances 0.000 title claims abstract description 19
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 title abstract description 8
- 229910000037 hydrogen sulfide Inorganic materials 0.000 title abstract description 8
- 238000004519 manufacturing process Methods 0.000 title abstract description 8
- 239000010935 stainless steel Substances 0.000 title abstract 2
- 230000007797 corrosion Effects 0.000 claims abstract description 32
- 238000005260 corrosion Methods 0.000 claims abstract description 32
- 238000005096 rolling process Methods 0.000 claims abstract description 17
- 238000003723 Smelting Methods 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 238000009749 continuous casting Methods 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 238000007670 refining Methods 0.000 claims abstract description 6
- 238000005496 tempering Methods 0.000 claims abstract description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 11
- 229910052717 sulfur Inorganic materials 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 9
- 229910052796 boron Inorganic materials 0.000 claims description 7
- 229910052804 chromium Inorganic materials 0.000 claims description 7
- 229910052748 manganese Inorganic materials 0.000 claims description 7
- 229910052750 molybdenum Inorganic materials 0.000 claims description 7
- 229910052758 niobium Inorganic materials 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 229910052698 phosphorus Inorganic materials 0.000 claims description 7
- 229910052720 vanadium Inorganic materials 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 229910052746 lanthanum Inorganic materials 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000003607 modifier Substances 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 229910052726 zirconium Inorganic materials 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 229910008455 Si—Ca Inorganic materials 0.000 claims description 3
- 229910001566 austenite Inorganic materials 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims description 2
- 238000005987 sulfurization reaction Methods 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 12
- 239000000126 substance Substances 0.000 abstract description 3
- 238000010791 quenching Methods 0.000 abstract 1
- 230000000171 quenching effect Effects 0.000 abstract 1
- 238000009849 vacuum degassing Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 8
- 229910052785 arsenic Inorganic materials 0.000 description 4
- 229910052797 bismuth Inorganic materials 0.000 description 4
- 238000005336 cracking Methods 0.000 description 4
- 229910052745 lead Inorganic materials 0.000 description 4
- 229910052718 tin Inorganic materials 0.000 description 4
- 239000008186 active pharmaceutical agent Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000010813 municipal solid waste Substances 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 229910052787 antimony Inorganic materials 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- LRDIEHDJWYRVPT-UHFFFAOYSA-N 4-amino-5-hydroxynaphthalene-1-sulfonic acid Chemical compound C1=CC(O)=C2C(N)=CC=C(S(O)(=O)=O)C2=C1 LRDIEHDJWYRVPT-UHFFFAOYSA-N 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 125000001967 indiganyl group Chemical group [H][In]([H])[*] 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- -1 wherein Sb be 0.003% Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
- C21D8/105—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention discloses a 110Ksi steel grade hydrogen sulfide stress corrosion-resistant steel pipe for an oil well and a production method thereof. The steel pipe comprises the following components by mass percent: 0.20 to 0.28% of C, 0.12 to 0.35% of Si, 0.4 to 0.8% of Mn, 0.001 to 0.011% of P, 0.0001 to 0.003% of S, 0.9 to 1.4% of Cr, 0.7 to 1.2% of Mo, 0.0003 to 0.003% of B, 0.02 to 0.045% of Nb, 0.04 to 0.08% of V, 0.005 to 0.05% of Al, 0 to 0.1% of Zr, 0 to 0.3% of Ni, 0 to 0.15% of Cu, 0 to 0.01% of La, 0 to 0.002% of O, 0 to 0.009% of N and 0 to 0.00015% of H, and the balance being Fe and unavoidable impurities. The production method of the steel pipe sequentially comprises the steps of electric furnace smelting, external refining, vacuum degassing, continuous casting and rolling, steel billet heating, steel pipe rolling, and quenching and tempering and straightening. The steel pipe has excellent physical and chemical properties, the index meets the API requirement, the hydrogen sulfide stress corrosion resistance threshold value reaches 90%YS min, the average grain size is 10 grade and is higher than the API requirement, and the steel pipe is applicable to an oil and gas field with a hydrogen sulfide environment, and is safe and efficient.
Description
Technical field
The present invention relates to oil field steel pipe's production technical field, the anti-H 2 S stress corrosion of a kind of 110Ksi grade of steel
Oil Well Pipe and production method thereof.
Background technology
Along with the oil gas field of the most relatively easy exploiting is petered out, and various countries are for the continuous growth of energy demand, force people
The sulfide hydrogen oil gas field that turns to coal mining geological condition the most severe of having to；In world's oil gas field, about 1/3 containing sulfuration
Hydrogen, in several major oil and gas fields of China, as the oil gas fields such as Sichuan, long celebrating, Central Plains, North China, Tarim Basin all contain
H2S gas in various degree；Abroad also there are many hydrogen sulfide containing oil gas fields, such as the Panamanian oil field, Canadian of the U.S.
Alberta oil field etc..
Containing in H2S acid oil gas system, SSCC exists mainly in high strength steel, high internal stress component and hard solder and sews on；SSCC
It is to be reacted the hydrogen atom separated out, at H by H, S corroding cathode2After entering in steel under the catalysis of S, tensile stress (additional/
Remaining) effect under, by diffusion, the cracking caused in the Three-direction stretching stressed zone enrichment that metallurgical imperfection provides, cracking
Being perpendicular to tensile stress direction, generally believe that the essence of SSCC belongs to hydrogen embrittlement, SSCC belongs to low stress and ruptures, and occurs SSCC's
Stress value is typically well below the tensile strength of steel.SSCC enbrittles the fracture apperance of mechanism characteristic, transcrystalline and destroying along brilliant
All can be observed, general high strength steel mostly is and ruptures along crystalline substance, and SSCC destroys and mostly is sudden, and crackle produces and extension is rapid；
To material sensitive for SSCC containing H2In S-acid oil gas, after of short duration exposure, arise that and rupture, with a few hours to three
The moon, situation was many, and need not there be obvious general corrosion vestige on the surface of generation SSCC steel, and SSCC can originate in the interior of component
Portion, it is not necessary to need a surface defect as cracking origin；Therefore, it to be different from stress corrosion cracking (SSCC) necessary
Originate in the corrosion surface developed.
Previous scholars is pointed out, when steel apply the stress less than certain value, steel can't occur SSCC, this stress value
It is referred to as anti-H 2 S stress corrosion threshold value；Research shows, when the yield strength of material reaches 700MPa, and resisting of material
H 2 S stress corrosion threshold value drastically reduces, even if the lowest stress also can rupture by atarting material, this is also 80Ksi, 95Ksi
The sulfur resistive sleeve pipe of grade of steel is relatively easily researched and developed, and the technology of the sulfur resistive sleeve pipe of 110Ksi the most gradually shapes.
In conjunction with above-mentioned SSCC genesis mechanism, it is thus achieved that the approximate equilibrium tissue of material, reduce various metallurgical imperfection, manufacturing deficiency
Existence, be improve material anti-SSCC performance key；And the steel pipe such as P110 of common 110 grade of steels, thermal recovery pipe etc., carry
The mode of strong mechanical performance is mainly dispersion-strengtherning, dislocation strengthening etc., is in non-equilibrium microstructure, and it is internal containing substantial amounts of hydrogen
Trap, anti-SSCC poor performance, if these materials are carried out higher temperature tempering, it obtains approximate equilibrium tissue, and strong
Degree is but substantially reduced.
In terms of the trend of OCTG exploitation, as the steel pipe of the main goods and materials of petroleum industry, its intensity rank and corrosion resistance
Requiring more and more higher, lot of domestic and international producer has begun to supply the anti-H 2 S stress corrosion oil well steel of 110Ksi rank
Pipe；Affect intensity, ballistic work, corrosion resistance factor a lot, including Design of Chemical Composition, field trash, gas content,
Grain size, rolling mill practice, heat treatment etc., and interrelated between each influence factor, especially field trash, grain size and
Composition Control affect highly significant；Also to ensure relatively HI high impact merit under the conditions of high intensity, and there is soft and excellent resistance to
The performance of H 2 S stress corrosion is the maximum difficult point of this type of steel pipe exploitation, captures the oil that exploitation is contained hydrogen sulfide by this difficulty
Gas field is significant.
Summary of the invention
It is an object of the invention to provide Oil Well Pipe and the production thereof of the anti-H 2 S stress corrosion of a kind of 110Ksi grade of steel
Method；This steel pipe has excellent physicochemical property, serviceability and anti-H 2 S stress corrosion performance, its anti-H 2 S stress
Corrosion threshold value reaches 90%YSmin, higher than API requirement, it is achieved that the high intensity of Hi-grade steel steel pipe and good of soft
Join.
For achieving the above object, the present invention provides following technical scheme:
The Oil Well Pipe of the anti-H 2 S stress corrosion of a kind of 110Ksi grade of steel, includes according to the composition of mass percent:
0.20-0.28%C, 0.12-0.35%Si, 0.4-0.8%Mn, 0.001-0.011%P, 0.0001-0.003%S, 0.9-1.4%Cr,
0.7-1.2%Mo, 0.0003-0.003%B, 0.02-0.045%Nb, 0.04-0.08%V, 0.005-0.05%Al, 0-0.1%
Zr, 0-0.3%Ni, 0-0.15%Cu, 0-0.01%La, 0-0.002%O, 0-0.009%N, 0-0.00015%H, surplus
For Fe and impurity.
As the further scheme of the present invention: the preparation of the Oil Well Pipe of the anti-H 2 S stress corrosion of described 110Ksi grade of steel
Method, comprises the following steps successively: electric furnace smelting, external refining, vacuum outgas, continuous casting, tandem rolling, heating steel billet, steel
Pipe rolling, modifier treatment, aligning.
As the present invention further scheme: described electric furnace smelting, external refining, vacuum outgas, continuous casting, tandem rolling step
Smelting and forming step for steel billet, molten iron, first through electric furnace smelting, is sent into LF stove refine, and is fed Al line, molten steel temperature 1600 DEG C～
When 1660 DEG C, carry out VD stove application of vacuum, vacuum 20Pa～45Pa, add Si-Ca line before vacuum, when vacuum keeps
Between 10min～20min, adopt to smelt in this way and ensure that the degree of purity of steel, molten steel temperature is at 1500 DEG C～1550 DEG C
Time, it is casting continuously to form circular pipe blank, then circular pipe blank is carried out continuous rolling when 1100 DEG C～1260 DEG C, the deformation ratio of circular pipe blank >=
4, then it is cooled to room temperature, circular pipe blank austenite mean grain size is narrower than 6 grades.
As the present invention further scheme: in described heating steel billet and steel pipe rolling step, circular pipe blank is heated to
1180 DEG C～1230 DEG C, temperature 1150 DEG C～1210 DEG C before perforation, temperature 950 DEG C～1150 DEG C before oblique milling, before stretch reducing
Temperature 800 DEG C～960 DEG C.
As the present invention further scheme: in described modifier treatment step, hardening heat is 890 DEG C～920 DEG C, water-cooled；
Temperature is 670 DEG C～690 DEG C, air cooling.
As the present invention further scheme: described straightening step, after tempering, take advantage of temperature, when 510 DEG C～610 DEG C, by steel
Pipe is aligned, and obtains fished pipe.
Compared with prior art, the invention has the beneficial effects as follows: the steel pipe of the present invention has excellent room-temperature property, steel pipe resists
Tensile strength >=793MPa, yield strength is 758～828MPa, elongation percentage >=15%, yield tensile ratio≤0.93；End hardness≤HRC30
And firmness change≤HRC3.0, the Charpy v-notch of described steel pipe 0 DEG C longitudinally full-scale ballistic work >=120J；Described steel pipe
The horizontal full-scale ballistic work >=90J of Charpy v-notch of 0 DEG C, mean grain size 10-12 level；Use preparation method of the present invention
The steel pipe of preparation, had both possessed higher intensity and low hardness, had possessed again good toughness and plasticity, its anti-H 2 S stress
Corrosion threshold value reaches 90%YSmin, higher than API requirement, can be widely applied in the environment containing H 2 S stress corrosion.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the technical scheme of this patent is described in more detail.
Embodiment 1
The Oil Well Pipe of the anti-H 2 S stress corrosion of a kind of 110Ksi grade of steel, includes according to the composition of mass percent:
0.20-0.28%C, 0.12-0.35%Si, 0.4-0.8%Mn, 0.001-0.011%P, 0.0001-0.003%S, 0.9-1.4%Cr,
0.7-1.2%Mo, 0.0003-0.003%B, 0.02-0.045%Nb, 0.04-0.08%V, 0.005-0.05%Al, 0-0.1%
Zr, 0-0.3%Ni, 0-0.15%Cu, 0-0.01%La, 0-0.002%O, 0-0.009%N, 0-0.00015%H, surplus
For Fe and impurity.
Wherein impurity includes Sb, Bi, Pb, As, Sn, O, H, N；Sb≤0.01%, Bi≤0.01%, Pb≤0.01%,
As≤0.015%, Sn≤0.015%, O≤0.002%, N≤0.009%, H≤0.00015%.
The preparation method of the Oil Well Pipe of the anti-H 2 S stress corrosion of described 110Ksi grade of steel, comprises the following steps successively:
Electric furnace smelting, external refining, vacuum outgas, continuous casting, tandem rolling, heating steel billet, steel pipe rolling, modifier treatment, aligning；
Method particularly includes: first carrying out steel billet smelting and forming step, molten iron, first through electric furnace smelting, is sent into LF stove refine, and is fed
Al line, during molten steel temperature 1600 DEG C～1660 DEG C, carries out VD stove application of vacuum, vacuum 20Pa～45Pa, adds before vacuum
Entering Si-Ca line, vacuum retention time 10min～20min, molten steel temperature, when 1500 DEG C～1550 DEG C, is casting continuously to form pipe
Base, then carries out continuous rolling by circular pipe blank when 1100 DEG C～1260 DEG C, and then deformation ratio >=4 of circular pipe blank are cooled to
Room temperature, circular pipe blank austenite mean grain size is narrower than 6 grades；Then carrying out heating steel billet and steel pipe rolling, circular pipe blank is heated to
1180 DEG C～1230 DEG C, temperature 1150 DEG C～1210 DEG C before perforation, temperature 950 DEG C～1150 DEG C before oblique milling, before stretch reducing
Temperature 800 DEG C～960 DEG C；Then carrying out modifier treatment, hardening heat is 890 DEG C～920 DEG C, water-cooled；Temperature is
670 DEG C～690 DEG C, air cooling；Finally take advantage of temperature after tempering, when 510 DEG C～610 DEG C, steel pipe is aligned, obtains fished pipe.
The Oil Well Pipe of the anti-H 2 S stress corrosion of the 110Ksi grade of steel of the present invention, its room-temperature property is as follows: steel pipe resists
Tensile strength >=793MPa, yield strength is 758～828MPa, elongation percentage >=15%, yield tensile ratio≤0.93；End hardness≤HRC30
And firmness change≤HRC3.0, the Charpy v-notch of described steel pipe 0 DEG C longitudinally full-scale ballistic work >=120J；Described steel pipe
The horizontal full-scale ballistic work >=90J of Charpy v-notch of 0 DEG C；Described steel pipe anti-H 2 S stress corrosion threshold value reaches
90%YSmin, mean grain size 10 grades.
By the Oil Well Pipe of the anti-H 2 S stress corrosion of 110Ksi grade of steel prepared by the embodiment of the present invention 1 is examined
Surveying, testing result is as follows:
1) actual constituent detection:
The steel pipe produced in randomly drawing 3 heat (batch) numbers carries out actual constituent detection, and testing result is as follows:
1.1) No. 1 stove: 0.20%C, 0.16%Si, 0.6%Mn, 0.008%P, 0.002%S, 1.0%Cr, 0.73%Mo,
0.1%Ni, 0.001%B, 0.03%Nb, 0.05%V, 0.02%Al, 0.002%La, 0.03%Zr, 0.02%Cu；
1.2) No. 2 stove: 0.25%C, 0.18%Si, 0.5%Mn, 0.008%P, 0.003%S, 1.1%Cr, 0.75%Mo,
0.1%Ni, 0.002%B, 0.03%Nb, 0.04%V, 0.03%Al, 0.001%La, 0.04%Zr, 0.02%Cu；
1.3) No. 3 stove: 0.27%C, 0.30%Si, 0.6%Mn, 0.008%P, 0.003%S, 1.2%Cr, 0.9%Mo, 0.1%Ni,
0.002%B, 0.04%Nb, 0.06%V, 0.02%Al, 0.002%La, 0.02%Zr, 0.02%Cu；
Inevitably impurity: Sb, Bi, Pb, As, Sn, O, H, N, wherein Sb be 0.003%, Bi be 0.001%,
Pb is 0.001%, As is 0.006%, Sn is 0.003%, O is 0.0012%, N is 0.0066%, H is 0.0001%.
P, S residual that steel-making Composition Control is relatively low, interpolation Mn, Cr, Mo etc., as main alloy element, improve iron and steel
Intensity and toughness, improve the through hardening ability of steel；Zr, B, V, Nb element adding trace improves temper resistance, carefully
Change crystal grain；Ca improves distribution and the form of field trash.
In steel pipe of the present invention, non-metallic inclusion meets according to A, B, C, D and DS judge picture in appendix A in GB/T10561
Grading, the testing result of thick system and thin system is shown in Table 2.
Table 2 non-metallic inclusion
The final finished pipe of the present invention has good obdurability and mates, higher room-temperature yield strength, excellent elongation percentage,
Suitably yield tensile ratio, stable hardness, the Charpy v-notch of this steel pipe 0 DEG C longitudinally full-scale ballistic work and the most full-scale
Ballistic work is the most excellent, grain size 10-12 level；The results of property of the steel pipe of the present invention is shown in Table 3:
Table 3 steel tube performance testing result
Above the better embodiment of this patent is explained in detail, but this patent is not limited to above-mentioned embodiment,
In the ken that those of ordinary skill in the art is possessed, it is also possible to make each on the premise of without departing from this patent objective
Plant change.
Claims (7)
1. the Oil Well Pipe of the anti-H 2 S stress corrosion of a 110Ksi grade of steel, it is characterised in that according to mass percent
Composition include: 0.20-0.28%C, 0.12-0.35%Si, 0.4-0.8%Mn, 0.001-0.011%P, 0.0001-0.003%
S, 0.9-1.4%Cr, 0.7-1.2%Mo, 0.0003-0.003%B, 0.02-0.045%Nb, 0.04-0.08%V, 0.005-0.05%
Al, 0-0.1%Zr, 0-0.3%Ni, 0-0.15%Cu, 0-0.01%La, 0-0.002%O, 0-0.009%N, 0-0.00015%
H, surplus is Fe and impurity.
The preparation method of the Oil Well Pipe of the anti-H 2 S stress corrosion of 110Ksi grade of steel the most according to claim 1,
It is characterized in that, comprise the following steps successively: electric furnace smelting, external refining, vacuum outgas, continuous casting, tandem rolling, steel billet add
Heat, steel pipe rolling, modifier treatment, aligning.
The preparation method of the Oil Well Pipe of the anti-H 2 S stress corrosion of 110Ksi grade of steel the most according to claim 2,
It is characterized in that, described electric furnace smelting, external refining, vacuum outgas, continuous casting, tandem rolling step are that steel billet is smelted and molding step
Suddenly, molten iron, first through electric furnace smelting, is sent into LF stove refine, and is fed Al line, during molten steel temperature 1600 DEG C～1660 DEG C, carry out
VD stove application of vacuum, vacuum 20Pa～45Pa, addition Si-Ca line before vacuum, vacuum retention time 10min～20min,
Molten steel temperature, when 1500 DEG C～1550 DEG C, is casting continuously to form circular pipe blank, is then carried out when 1100 DEG C～1260 DEG C by circular pipe blank
Continuous rolling, deformation ratio >=4 of circular pipe blank, then it is cooled to room temperature, circular pipe blank austenite mean grain size is narrower than 6 grades.
The preparation method of the Oil Well Pipe of the anti-H 2 S stress corrosion of 110Ksi grade of steel the most according to claim 2,
It is characterized in that, in described heating steel billet and steel pipe rolling step, circular pipe blank is heated to 1180 DEG C～1230 DEG C, temperature before perforation
Spend 1150 DEG C～1210 DEG C, temperature 950 DEG C～1150 DEG C before oblique milling, temperature 800 DEG C～960 DEG C before stretch reducing.
The preparation method of the Oil Well Pipe of the anti-H 2 S stress corrosion of 110Ksi grade of steel the most according to claim 2,
It is characterized in that, in described modifier treatment step, hardening heat is 890 DEG C～920 DEG C, water-cooled；Temperature be 670 DEG C～
690 DEG C, air cooling.
The preparation method of the Oil Well Pipe of the anti-H 2 S stress corrosion of 110Ksi grade of steel the most according to claim 2,
It is characterized in that described straightening step takes advantage of temperature after tempering, when 510 DEG C～610 DEG C, steel pipe is aligned, obtains finished steel
Pipe.
7. according to the Oil Well Pipe of the anti-H 2 S stress corrosion of the arbitrary described 110Ksi grade of steel of claim 1-2, its
Being characterised by, described steel pipe tensile strength >=793MPa, yield strength is 758～828MPa, elongation percentage >=15%, yield tensile ratio
≤0.93；End hardness≤HRC30 and firmness change≤HRC3.0, the most full chi of the Charpy v-notch of described steel pipe 0 DEG C
Very little ballistic work >=120J；The horizontal full-scale ballistic work >=90J of Charpy v-notch of described steel pipe 0 DEG C；Described steel pipe sulfuration resistant
Hydrogen Stress corrosion threshold reaches 90%YSmin, mean grain size 10 grades.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610482225.4A CN106011657A (en) | 2016-06-28 | 2016-06-28 | 110Ksi steel grade hydrogen sulfide stress corrosion-resistant steel pipe for oil well and production method thereof |
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| CN201610482225.4A CN106011657A (en) | 2016-06-28 | 2016-06-28 | 110Ksi steel grade hydrogen sulfide stress corrosion-resistant steel pipe for oil well and production method thereof |
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| CN106011657A true CN106011657A (en) | 2016-10-12 |
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| CN201610482225.4A Pending CN106011657A (en) | 2016-06-28 | 2016-06-28 | 110Ksi steel grade hydrogen sulfide stress corrosion-resistant steel pipe for oil well and production method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109680214A (en) * | 2019-02-21 | 2019-04-26 | 南通乾宇汽车零部件有限公司 | A kind of high intensity starter reduction gear ring material |
| CN111471926A (en) * | 2020-04-09 | 2020-07-31 | 烟台大学 | Pipe joint and preparation method thereof |
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| CN101082112A (en) * | 2006-05-30 | 2007-12-05 | 宝山钢铁股份有限公司 | 110Ksi grade CO2 H2S rust-proof oil well-pipe and manufacturing method |
| CN101233245A (en) * | 2005-07-25 | 2008-07-30 | 住友金属工业株式会社 | Method for producing seamless steel pipe |
| CN102459677A (en) * | 2009-06-24 | 2012-05-16 | 杰富意钢铁株式会社 | High-strength seamless steel tube for use in oil wells, which has excellent resistance to sulfide stress cracking and production method for same |
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| CN101233245A (en) * | 2005-07-25 | 2008-07-30 | 住友金属工业株式会社 | Method for producing seamless steel pipe |
| CN101082112A (en) * | 2006-05-30 | 2007-12-05 | 宝山钢铁股份有限公司 | 110Ksi grade CO2 H2S rust-proof oil well-pipe and manufacturing method |
| CN102459677A (en) * | 2009-06-24 | 2012-05-16 | 杰富意钢铁株式会社 | High-strength seamless steel tube for use in oil wells, which has excellent resistance to sulfide stress cracking and production method for same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109680214A (en) * | 2019-02-21 | 2019-04-26 | 南通乾宇汽车零部件有限公司 | A kind of high intensity starter reduction gear ring material |
| CN111471926A (en) * | 2020-04-09 | 2020-07-31 | 烟台大学 | Pipe joint and preparation method thereof |
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Application publication date: 20161012 |