CN104357756B - A kind of anti-H 2 S stress corrosion straight seam welding petroleum casing pipe and manufacture method thereof - Google Patents
A kind of anti-H 2 S stress corrosion straight seam welding petroleum casing pipe and manufacture method thereof Download PDFInfo
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
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- 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
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- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
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Abstract
The invention discloses a kind of anti-H 2 S stress corrosion straight seam welding petroleum casing pipe and manufacture method thereof, the weight percent proportioning of its chemical composition is C:0.08 0.15%；Si:0.15 0.30%；Mn:0.5 1.0%；P :≤0.010%；S :≤0.005%；Cr:0.40 0.65%；Ni :≤0.25%；Mo:0.30 0.50%；Nb≤0.02%；V:0.05 0.1%；Zr:0.0005 0.01%；Al:0.005 0.01%；Ca0.001 0.003%；B:0.0005 0.001%；RE:0.001 0.005%；Surplus is Fe and inevitable impurity.Through smelting, be casting continuously to form square billet, controlled rolling becomes roll bending, roll bending slitting, welding fabrication become pipe, hot tensile strength tube reducing, line pipe control cooling, full body heat treatment, coupling surface process and screw thread process after, make petroleum casing pipe.The product of the present invention has obdurability coupling height, crystal grain H tiny, anti-2S stress corrosion performance is better than the anti-H of standard regulation2S Stress corrosion threshold, can be used for the exploitation of oil-gas field requirement containing certain hydrogen sulfide gas.
Description
Technical field
The present invention relates to a kind of low alloy petroleum natural gas petroleum casing pipe, be specifically related to a kind of anti-H 2 S stress
Corrosion straight seam welding petroleum casing pipe and manufacture method thereof.
Background technology
In China's petroleum resources, a part of Oil/gas Well also exists H2S gas, sleeve pipe use stress and
H2S gas solution jointly acts on down and is susceptible to stress corrosion inefficacy, and is difficult to predict.To this end, both at home and abroad
In succession develop anti-H2The oil pipe of S corrosion and casing product, effectively reduce because of anti-H2S stress corrosion causes
Heavy damage.
The corrosion-resistant petroleum casing pipe of domestic-developed is mostly based on seamless steel pipe at present, there is bias, circularity
The series of problems such as error is relatively large, wall unevenness is even, inside pipe wall quality is the best, and vertical masonry joint welding resistance steel pipe with
It is best in quality and replaces seamless pipe in increasing field.Weldquality and performance are to hinder vertical masonry joint electric resistance welding
Female connector pipe is applied to the barrier in OCTG field.Produce and compared with weld seam processing mode with tradition ERW, " high
Frequently electric resistance welding molding+hot tensile strength tube reducing+full body Tempering and Quenching " etc. group technology as domestic nearest appearance
The mode of production of new-type production tubing and casing, processes longitudinal resistance welded pipe weld seam and incorporates thermomechanical high temperature rolling, make
Weldquality and performance are optimized and are improved, and can meet the application requirement of OCTG field.
Summary of the invention
Present invention aim at providing a kind of anti-H 2 S stress corrosion straight seam welding petroleum casing pipe and manufacturer thereof
Method, it is adaptable to containing the design of string pipe of certain composition hydrogen sulfide Oil/gas Well.The anti-H 2 S stress corrosion of the present invention
Straight seam welding petroleum casing pipe product yield strength is 630-680MPa, and tensile strength is 740-800MPa, Qu Qiang
Ratio≤0.90, elongation percentage >=22%, grain size >=9, hardness variable≤3HRC, residual stress≤80MPa, weldering
The hydrogen sulfide corrosion resistance of seam and mother metal can be pressed NACE TM 0177-2005 standard and be used A method in solution A
Load sample under 90% nominal-ultimate strength load not ftracture through 720 hours, there is obdurability and match, residual
Residue stress is little, anti-H2S stress corrosion cracking performance, can meet and have certain H2The oil that S stress corrosion requires
Gas-field exploitation demand.
For realizing above-mentioned requirements, the petroleum casing resisting stress corrosion of H 2 S of present invention hot-rolled coil chemical composition
For C:0.08-0.15%；Si:0.15-0.30%；Mn:0.5-1.0%；P :≤0.010%；S :≤0.005%；
Cr:0.40-0.65%；Ni :≤0.25%；Mo:0.30-0.50%；Nb≤0.02%；V:0.05-0.1%；
Zr:0.0005-0.01%；Al:0.005-0.01%；Ca0.001-0.003%；B:0.0005-0.001%；RE:
0.001-0.005%；Surplus is Fe and inevitable impurity.
The present invention designs alloying component and chooses explanation:
C: carbon is main solution strengthening element, can form hardening constituent with multiple alloy, improve the intensity of steel.But
When carbon content is the lowest, steel strength is inadequate；The toughness of steel, anti-H 2 S stress corrosion it is easily reduced time too high
And hardness can be caused higher.Because this product uses hot-rolled coil HFW molding, welding performance to be fully taken into account
And weldquality, be conducive to the intensified element of welding and subsequent heat treatment technique can make up intensity deficiency simultaneously.For
Realize the purpose of the present invention C content to be controlled in relatively low scope, both can play invigoration effect, not reduce
The performances such as welding, toughness and corrosion, thus C scope of design is 0.08%-0.15%.
Mn: manganese is remarkably improved the quenching degree of steel, improves the intensity of steel.But it is easily inclined at crystal boundary when content is many
Poly-, ultimately form banded structure, reduce the sulfurated hydrogen stress etching-resisting performance of steel；For reaching the purpose of invention,
Scope of design is 0.5-1.0%.
The lowest sulfurated hydrogen stress etching-resisting to steel of P, S: sulfur, phosphorus content is the most favourable, therefore, limits P :≤0.010,
S :≤0.005, to ensure that steel realizes anti-sulfurated hydrogen stress etching-resisting performance indications.
Si: silicon acts primarily as deoxidation, unfavorable to toughness and anticorrosion stress-resistant performance when content is many, therefore content is more
Low the best, it is limited to 0.15-0.30%.
Cr: chromium improves quenching degree, improves the obdurability of steel, improves the decay resistance of steel.But hold when content is many
In HFW welds, easily produce the defect such as field trash, greyness, significantly reduce weld seam sulfurated hydrogen stress etching-resisting
Energy.Therefore chromium content is controlled between 0.4%-0.65%.
Ni: nickel can expand quenching degree, makes Ac point reduce.When content≤0.25%, improving anti-H 2 S should
Power corrosive nature, improves comprehensive mechanical performance and antioxidant anticorrosive, pitting corrosion.But its price is high, increases into
This.The present invention controls its content≤0.25%.
Mo: molybdenum improves quenching degree, improves steel belt roof bolt stability, suppresses temper brittleness, crystal grain thinning and resistance to point
Erosion effect is obvious.Carbide, the Mo of its disperse2C is the strong trap of hydrogen, can reduce diffusion a surname
Long-pending hydrogen amount.But during content height, because expensive and cost increases substantially, and easily formed thick at crystal boundary
Carbide, reduces H 2 S stress corrosion performance.Therefore, its content is controlled between 0.3-0.5% by the present invention.
Nb: niobium can form C, N compound, crystal grain thinning, forms fine grain structure and children when austenitizing
Little carbide, improves obdurability and the hydrogen sulfide corrosion resistance energy of steel；But price is high, adds and too much increase cost,
Optional interpolation, thus the present invention controls its content≤0.02%.
V: vanadium is carbide, can form C, N compound, has crystal grain thinning, improves intensity
With the effect of toughness, improve steel belt roof bolt stability；But during too high levels, toughness reduces, and is also unfavorable for corrosivity
Energy.Thus the present invention controls its content at 0.05-0.1%.
Zr: zirconium acts on similar to niobium, titanium, vanadium in steel.But add trace zirconium to there is deoxidation, purify, refine
Crystal grain and field trash is had obvious metamorphism.Mix with Cr and rare earth and add fashionable, conjunction can be significantly inhibited
The recrystallization of gold, improves Alloy Anti stress corrosion.It is 0.0005-0.01% for reach goal of the invention controlling Zr content.
Al: aluminum can form alumina protective layer in corrosion, corrosive medium can be suppressed to invade matrix, can carry
The hydrogen sulfide corrosion-resistant performance of high sleeve pipe；Toughness and the processability of steel can be improved as deoxidizer simultaneously.But content
Excessive, easily form oxide and be mingled with, reduce the corrosive nature of toughness.Thus its content is controlled at Al:
0.005-0.01%.
Ca: calcium can form sulfide with sulfur, improves the form of sulphide inculsion, should to the resisting sulfide improving steel
Power corrosive nature is highly beneficial.Increase due to field trash when content >=0.003%, reduce the cleanliness factor of steel, make
Anti-H 2 S stress corrosion performance is become to reduce.For reaching the purpose of invention, Ca content scope of design is
0.001-0.003%.
B: improve quenching degree element, strengthens grain-boundary strength, can replace Ni (Cr, Mo) to a certain extent.
Preferably B content is 0.0005-0.001%.
RE: rare earth element has the strongest desulfurization, deoxidizing capacity, and it does not only has and purifies molten steel effect, it may have
Invigoration effect.Can suppress sulfur segregation on crystal boundary, white point that suppression hydrogen causes and fragility, control inclusion morphology
And carbide, improve crystal boundary and suppression local weakness.For reaching goal of the invention, content range controls
0.001%-0.005%.
This invention product corresponding manufacturing method, its technological process is as follows:
(1) raw material molten iron and steel scrap are casting continuously to form slab, so after smelting, external refining and vacuum outgas
High-quality roll bending is made after rear rolling and cooling.
(2) using high accuracy hot-rolled coil is raw material, by steel band slitting, milling limit, through FFX brake forming
Welding with HFW, adjustment moulding process, control welding parameter (frequency, heat input, speed of welding) are welded into
ERW.
(3) postwelding instant inner and outer welding burr finishing, inner burr slot scraping and outer burr reinforcement all≤0.50mm,
Make welding bead flush with body surfaces externally and internally, smooth, eccentricity≤5%, external diameter out-of-roundness≤0.5%.
(4) use Medium frequency induction to heat with 20 DEG C-50 DEG C/s, HFW welded tube pipe is quickly heated up to tubing
Austenitizing phase transition temperature Ac3 more than about 960 DEG C-1050 DEG C, subsequently into hot tensile strength reducing mill roller mill
Group, tube reducing subtracts the pipe of wall thickness extremely required specification.
(5) utilize control chiller that steel pipe uses the cooling rate cooling more than 50 DEG C/s after hot tensile strength tube reducing.
(6) use full body heat treatment heat to be opened to subtract pipe mechanical performance and adjust to the scope required by standard:
Its technique is for carrying out temper, and temperature is between 655 DEG C-700 DEG C, and tempering time is 60-80min.
(7) come out of the stove after the insulation of tempered stove, utilize remaining temperature to be carried into thermal straightening machine and carry out high-temperature straightening, temperature
Degree controls as 500-600 DEG C；Enter inlet temperature >=550 DEG C of straightener.
(8) it is tempered and aligns and be cooled to the steel pipe of room temperature and be reheated to 400 DEG C-500 DEG C, carrying out destressing
Process.
(9) box cupling screw thread carries out surface process, to improve its crevice corrosion ability.
(10) the complete qualified rear pipe end car silk of body nondestructive inspection, box cupling twist-on, hydrostatic test, upper protection
Finished sleeve is made in ring, spray mark and japanning etc..
Beneficial effect:
1) petroleum casing pipe of the present invention meets 90ksi steel grade oil well casing mechanical property requirements, and yield strength is
630-680MPa, tensile strength is 740-800MPa, yield tensile ratio≤0.90, elongation percentage >=22%, grain size >=9,
Hardness variable≤3HRC, residual stress≤80MPa.
2) due to the fact that employing TMCP hot-rolled coil, after HFW welding fabrication, tube blank size precision is high,
Follow-up hot tensile strength tube reducing and Technology for Heating Processing make its advantage retain, and final products dimensional accuracy can reach: wall thickness
Inequality degree≤5%, external diameter out-of-roundness≤0.5%, there is higher critical external compressive resistance Collapse strength.
3) roll bending cleanliness factor is high, and adds Cr, Mo, Nb, V etc. and be conducive to refining grain size and clean
Changing Ca, Zr, RE element of steel, its excellent combination property, obdurability and strong plasticity proportioning are good.Steel pipe is
Whole fine microstructures, grain size reaches more than 9 grades.Use high-temperature straightening and destressing to process, make product remnants answer
Power is little.
4) this product hydrogen sulfide corrosion resistance can press NACE 0177-2005 standard employing A method in solution A
Load sample under 90% nominal-ultimate strength load not ftracture through 720 hours, may be used for H 2 S-containing gas
Oil gas well mining.
5) this invention makes full use of online heat and subtracts waste heat, decreases heat treatment step and energy resource consumption rate, carries
The high productivity ratio of product, and reduce cost to a certain extent.
Detailed description of the invention
Being further illustrated the present invention in conjunction with embodiment, embodiment see table 1-table 4.By table 4
It can be seen that use chemical composition of the present invention and technique, the test corrosion-resistant vertical masonry joint petroleum casing pipe of production
Toughness and tenacity excellent, corrosive nature is good, is entirely capable of meeting the use of the corrosion-resistant petroleum casing pipe of 90ksi grade of steel
Performance requirement.
1) chemical composition that actual measurement is smelted
The melting chemical composition of steel tested by table 1
2) test casing processing parameter
Main production flow process of the present invention: roll bending rolling → pipe welding fabrication → hot tensile strength tube reducing → online
Control cooling → full body heat treatment → thermal straightening → nondestructive inspection → coupling surface process → screw thread process → quiet
Hydraulic pressure and mark → packaging etc..
The processing parameter of table 2 test casing
3) field trash
The microscopic structure of embodiment casing product of the present invention is uniform, crystal grain is tiny, non-metallic inclusion level
Grade summation is less than 4 grades, and its testing result is shown in Table 3.
The field trash of table 3 present example casing product and metallographic structure testing result
4) mechanical property, anti-H 2 S stress corrosion performance and critical external compressive resistance Collapse strength
Embodiment product mechanical property of the present invention meets API5CT and SY/T5989-2012 standard-required,
Hydrogen sulfide corrosion resistance can be pressed NACETM0177-2005 standard and be used A method to load 90% in solution A
Under justice yield strength load, sample did not ftractureed through 720 hours；Collapse resistance is higher than API5C3 name simultaneously
Value of calculation reaches more than 20%, and it the results are shown in Table shown in 4.
The mechanical property of table 4 sleeve pipe of the present invention, anti-H 2 S stress corrosion performance and collapse resistance
The above, be only presently preferred embodiments of the present invention, and the present invention not makees any pro forma limit
System, although the present invention is disclosed above with preferred embodiment, but is not limited to the present invention, any familiar
Professional and technical personnel, in the range of without departing from technical solution of the present invention, when the method for available the disclosure above
And technology contents makes a little Equivalent embodiments changed or be modified to equivalent variations, as long as being without departing from this
The content of bright technical scheme, any simple modification above example made according to the technical spirit of the present invention,
Equivalent variations and modification, still fall within the range of technical solution of the present invention.
Claims (5)
1. an anti-H 2 S stress corrosion straight seam welding petroleum casing pipe, it is characterised in that: described petroleum casing pipe
The weight percent proportioning of chemical composition is C:0.08-0.15%；Si:0.15-0.30%；Mn:0.5-1.0%；P:
≤ 0.010%；S :≤0.005%；Cr:0.40-0.65%；Ni :≤0.25%；Mo:0.30-0.50%；Nb≤0.02%；
V:0.05-0.1%；Zr:0.0005-0.01%；Al:0.005-0.01%；Ca 0.001-0.003%；
B:0.0005-0.001%；RE:0.001-0.005%；Surplus is Fe and inevitable impurity；
The yield strength of described petroleum casing pipe is 630-680MPa, and tensile strength is 740-800MPa, yield tensile ratio
≤ 0.90, elongation percentage >=22%, grain size >=9, hardness variable≤3HRC, residual stress≤80MPa；Weld seam
A method can be used to add in solution A by NACE TM 0177-2005 standard with the hydrogen sulfide corrosion resistance of mother metal
Carry sample under 90% nominal-ultimate strength load not ftracture through 720 hours；
Eccentricity≤5% of described petroleum casing pipe, external diameter out-of-roundness≤0.5%.
The manufacture method of petroleum casing pipe the most according to claim 1, it is characterised in that:
(1) raw material molten iron and steel scrap are casting continuously to form slab, so after smelting, external refining and vacuum outgas
High-quality roll bending is made after rear rolling and cooling；
(2) using high accuracy hot-rolled coil is raw material, by steel band slitting, milling limit, through FFX brake forming
Welding with HFW, adjustment moulding process, control welding parameter are welded into ERW；
(3) postwelding instant inner and outer welding burr finishing, inner burr slot scraping and outer burr reinforcement all≤0.50mm,
Make welding bead flush with body surfaces externally and internally, smooth, eccentricity≤5%, external diameter out-of-roundness≤0.5%；
(4) use Medium frequency induction to heat with 20 DEG C-50 DEG C/s, HFW welded tube pipe is quickly heated up to 960 DEG C
-1050 DEG C, subsequently into hot tensile strength reducing mill roll unit, tube reducing subtracts the pipe of wall thickness extremely required specification；
(5) utilizing control chiller to cool down steel pipe after hot tensile strength tube reducing, rate of cooling is more than 50 DEG C/s；
(6) use full body heat treatment heat to be opened to subtract pipe mechanical performance and adjust to the scope required by standard:
Its technique is for carrying out temper, and temperature is between 655 DEG C-700 DEG C, and tempering time is 60-80min；
(7) come out of the stove after the insulation of tempered stove, utilize remaining temperature to be carried into thermal straightening machine and carry out high-temperature straightening, temperature
Degree controls as 500-600 DEG C；Enter inlet temperature >=550 DEG C of straightener；
(8) it is tempered and aligns and be cooled to the steel pipe of room temperature and be reheated to 400 DEG C-500 DEG C, carrying out destressing
Process；
(9) box cupling screw thread carries out surface process, to improve its crevice corrosion ability；
(10) the complete qualified rear pipe end car silk of body nondestructive inspection, box cupling twist-on, hydrostatic test, upper protection
Finished sleeve is made in ring, spray mark and japanning.
The manufacture method of petroleum casing pipe the most according to claim 2, it is characterised in that:
Described welded tube pipe uses Frequency Induction Heating to carry out hot tensile strength by after heating of pipe blank to 960 DEG C-1050 DEG C
Tube reducing carries out multi-pass deformation process.
The manufacture method of petroleum casing pipe the most according to claim 2, it is characterised in that:
Described welded tube pipe utilizes waste heat to carry out full body to control cooling, control and cold but open after heat is opened and subtracted deformation
Beginning temperature >=820 DEG C.
The manufacture method of petroleum casing pipe the most according to claim 2, it is characterised in that:
The described hot-rolled coil grain size required for welded tube pipe should be more than 11 grades, and thickness is than final pipe
Wall thickness thickness 0.15-0.25mm, and in hot tensile strength tube reducing, reduce pipe external diameter and wall thickness dimension to final size.
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| CN109161788B (en) * | 2018-08-06 | 2022-03-22 | 中国石油天然气集团有限公司 | High-temperature-resistant petroleum casing pipe for thermal recovery well of hot steam injection thickened oil and manufacturing method thereof |
| CN110484804A (en) * | 2019-08-27 | 2019-11-22 | 山东钢铁股份有限公司 | A kind of Q550 corrosion-resisting steel and preparation method thereof being on active service for Minepit environment |
| CN111321345B (en) * | 2020-03-05 | 2021-11-16 | 中国石油天然气集团有限公司 | Tempering type high-quality continuous pipe and manufacturing method thereof |
| CN116145023A (en) * | 2021-11-23 | 2023-05-23 | 中国石油天然气集团有限公司 | High-strength high-toughness high-extrusion-resistance sleeve and processing method thereof |
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| JP5423324B2 (en) * | 2009-02-12 | 2014-02-19 | 新日鐵住金株式会社 | Steel plate for high-strength line pipe and steel pipe for high-strength line pipe with excellent resistance to hydrogen-induced cracking |
| IT1403689B1 (en) * | 2011-02-07 | 2013-10-31 | Dalmine Spa | HIGH-RESISTANCE STEEL TUBES WITH EXCELLENT LOW TEMPERATURE HARDNESS AND RESISTANCE TO CORROSION UNDER VOLTAGE SENSORS. |
| JP5824401B2 (en) * | 2012-03-30 | 2015-11-25 | 株式会社神戸製鋼所 | Steel sheet with excellent resistance to hydrogen-induced cracking and method for producing the same |
| CN103255345B (en) * | 2013-04-26 | 2015-07-15 | 宝鸡石油钢管有限责任公司 | 80ksi-steel-grade hydrogen sulfide stress corrosion resistant petroleum casing pipe and manufacturing method thereof |
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Effective date of registration: 20170524 Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Co-patentee after: Baoji Petroleum Steel Pipe Co., Ltd. Patentee after: China National Petroleum Corporation Address before: 721008 Weibin, Shaanxi province Jiang Tan Road, No. 10, No. Patentee before: Baoji Petroleum Steel Pipe Co., Ltd. |