CN105840919A - Continuous pipe resistant to H2S corrosion and manufacturing method thereof - Google Patents
Continuous pipe resistant to H2S corrosion and manufacturing method thereof Download PDFInfo
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- CN105840919A CN105840919A CN201510565775.8A CN201510565775A CN105840919A CN 105840919 A CN105840919 A CN 105840919A CN 201510565775 A CN201510565775 A CN 201510565775A CN 105840919 A CN105840919 A CN 105840919A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/02—Rigid pipes of metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- 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
- C22C38/40—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
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
Abstract
The invention discloses a continuous pipe resistant to H2S corrosion and a manufacturing method thereof. The continuous pipe comprises following material by mass percent such as C of 0.03-0.06 %, Si less than or equal to 0.152 %, Mn of 0.15-0.55%, P less than or equal to 0.01, S less than or equal to 0.003, Cr of 0.2-0.6 %, Mo less than or equal to 0.02, Ni of 0.1-0.27%, V of less than or equal to 0.06%, Ti of less than or equal to 0.03%, Nb of 0.05-0.09%, and the balance Fe. The continuous pipe resistant to H2S corrosion helps to solve the problem that an existing steel continuous pipe loses efficacy at a quick pace in an acid environment.The low-carbon low-manganese continuous pipe resistant to H2S corrosion has great intensity, plasticity and corrosion resistance.While meeting the mechanical properties of tubular products in the first place, banded segregation of parent material is substantially reduced by the low-carbon low-manganese alloying composition design so that defects are effectively reduced and H collection is prevented. The formation and expansion of cracks do not easily occur so that corrosion resistance of tubular products is remarkably improved. In the meantime, residual stress of tubular products by optimizing weld seams and carrying out thermal processing technology of parent material so that corrosion resistance is further enhanced.
Description
Technical field:
The invention belongs to petroleum gas tubing technical field, relate to resistance to H2S corrodes continuous pipe manufacturing technology.
Background technology:
Pipe is that a kind of high intensity, high tenacity, joint length are up to thousands of rice continuously, carbon steel material is used to be welded a kind of nonpetroleum tubing made by roll bending, it is widely used in the fields such as oil drilling, well workover, well logging, completion and oil-gas transportation, is referred to as " omnipotent pipe ".
At present, owing to domestic and international most of oil and gas wells in oil fields all containing H2S corrosive medium, uses the continuous pipe of common steel when underground work, and continuous pipe is prone to hydrogen induced cracking (HIC), causes tubing string to rupture, it is possible to create heavy economic losses or security incident.Main cause is, when steel are in hydrogen sulfide containing aqueous environment, hydrogen is absorbed in making steel due to electrochemical corrosion, molecular hydrogen is assembled and formed to hydrogen atom at discontinuity zones such as inclusion in steel thing or other heterogeneous microstructures, produce very high pressure, thus forming notch cuttype crackle and (or) hydrogen blister, this is sulfide environment hydrogen induced cracking (HIC) (HIC).Meanwhile, coiled tubing is in when being on active service in sulfur compound environment under the synergy of electrochemical corrosion and tensile stress, often occurs to postpone brittle fracture phenomenon, and this kind of destruction is referred to as the sulfide-stress cracking (SCC) of steel.At H2In S corrosive medium, HIC and SCC that continuous pipe occurs has become affects the significant obstacle that continuous pipe is applied in sour environment.
In the continuous pipe manufacturing method that " a kind of high-strength and high-plasticity coiled tubing manufacture method " (CN 101898295) announces, owing to, in continuous tube material Design of Chemical Composition, C, Mn content is higher, tubing hydrogen sulfide corrosion resistance can be not enough.Mainly along the rolling direction of steel, a large amount of pro-eutectoid ferrite and pearlite is had to overlie one another the banded structure produced.Existence due to a large amount of banded structures, it is easy to produce tissue defects, under external force, produce stress and concentrate, cause overall mechanical properties decrease.When using under continuous pipe is at sour environment, fault location can become H and assemble ground, when H dividing potential drop meets or exceeds the strength of materials, cracks and extends, causing continuous tube failure.
Accordingly, it would be desirable to research and development one is suitable at H2The continuous pipe of application in S environment.Low-carbon (LC) low manganess steel is applied in the production of continuous pipe by the present invention, forms resistance to H2The continuous tube steel material of S corrosion and continuous pipe product.
Summary of the invention:
It is an object of the invention to the shortcoming overcoming above-mentioned prior art, it is provided that a kind of resistance to H2The continuous pipe solution of S corrosion, by low-carbon (LC), low manganese, microalloying ingredient designs and rolling mill practice produces the low manganese of low-carbon (LC) continuous tube steel material, and by ratio-frequency welding (HFW) and special subsequent heat treatment technique, produce excellent performance, the length resistance to H up to thousands of meters2S corrodes continuous pipe product.
It is an object of the invention to solve by the following technical programs:
A kind of resistance to H2S corrosion pipe continuously, mass percent is as follows: C0.03-0.06, Si≤0.152, Mn0.15-0.55, P≤0.01, S≤0.003, Cr0.2-0.6, Mo≤0.02, Ni0.1-0.27, V≤0.06, Ti≤0.03, Nb0.05-0.09, Fe surplus.
Described continuous pipe external diameter is 25.4-88.9mm, wall thickness 1.9-7.6mm, and length is more than 61 meters, yield strength 483-620MPa, tensile strength >=552MPa, highest hardness 248HV0.5, grain size more than ASTM E112NO.10 level, banded structure≤1.5 grade.
Described resistance to H2S corrodes the manufacture method of continuous pipe, in accordance with the following steps: uses TMCP technique, by heating of plate blank to carrying out roughing when 1000-1300 DEG C, carries out finish rolling at 680 DEG C-880 DEG C；Coiling temperature 350-580 DEG C, is eventually fabricated between thickness 1.9-7.6mm and meets the coil of strip that application requires；Become to be suitable for the steel band produced by low for low-carbon (LC) manganese continuous tube steel volume slitting；Use Plasma Welding or other welding methods that steel band is docked to continuous pipe product Len req, and stay enough surpluses；After row-roll forming process, butt welded seam carries out 880 DEG C of-980 DEG C of heat treatments, optimizes seam organization, reduces welding stress；Full body carries out 550 DEG C of-760 DEG C of destressings subsequently process.
The low manganese of A low-carbon (LC) continuous tube steel material
1) steel product ingredient design:
According to following chemical component weight percentage ratio melting, it is forged into slab:
2) steel rolling technique is as follows:
Use TMCP technique, by the heating of plate blank of mentioned component to carrying out roughing when 1000-1300 DEG C, carry out finish rolling at 680 DEG C-880 DEG C；Coiling temperature 350-580 DEG C, is eventually fabricated between thickness 1.9-7.6mm and meets the coil of strip that application requires.
3) performance of steel:
Yield strength 430-600MPa, tensile strength >=540MPa, highest hardness 230HV0.5, grain size more than ASTM E112NO.10 level, banded structure≤1.5 grade.
B: resistance to H2S corrodes continuous pipe manufacturing process
1) become to be suitable for the steel band produced by low for low-carbon (LC) manganese continuous tube steel volume slitting.Use Plasma Welding or other welding methods that steel band is docked to continuous pipe product Len req, and stay enough surpluses.After row-roll forming process, butt welded seam carries out 880 DEG C of-980 DEG C of heat treatments, optimizes seam organization, reduces welding stress.Full body carries out 550 DEG C of-760 DEG C of destressings subsequently process.By above-mentioned butt welded seam and the heat treatment of mother metal higher temperature, reduce tubing residual stress further, improve H 2 S stress corrosion drag.
2) resistance to H2S corrodes continuous pipe main performance index
Use the low-carbon (LC) resistance to H of low manganese that the low manganese of low-carbon (LC) continuous tube steel material manufactures2It is 25.4-88.9mm that S corrodes continuous pipe external diameter, wall thickness 1.9-7.6mm, and length is more than 61 meters, yield strength 483-620MPa, tensile strength >=552MPa, highest hardness 248HV0.5。
Testing according to NACE's NACE standard TM0284-2003, this test uses High Purity Nitrogen deoxygenation, and etchant solution is the 0.5% acetic acid+5%NaCl mixed solution that hydrogen sulfide is saturated, etchant solution distilled water and chemically pure reagent preparation.Liquor capacity and Area of Sample ratio are more than 3mL/cm2, solution temperature is maintained at 25 ± 3 DEG C.After the test of 96 hours, sample is carried out, observes, do not have crackle and bubbling to produce.
According to NACE standard NACE TM 0177-1996, " metal material is containing H2Resisting sulfide stress corrosion cracking method for testing performance in S environment " (being equivalent to People's Republic of China's standard GB/T4157-2006 " metal is anti-specific form environmental cracking laboratory test in hydrogen-sulfide environmental ") test, load mode uses static stretch method, sample applies the tensile stress that numerical value is 90% yield pressure, and etchant solution is the solution A (hydrogen sulfide saturated 5%NaCl+0.5% glacial acetic acid aqueous solution) of regulation in standard.Through the stress etching experiment of 720 hours, sample did not ruptured.
The beneficial effects of the present invention is: the resistance to H of one of the present invention2S corrosion continuously pipe, solves the continuous pipe of existing steel and lost efficacy in sour environment problem faster.The resistance to H invented2S corrodes continuous pipe product and has higher intensity, plasticity and corrosion resistance.On the premise of meeting mechanical properties of tubular goods, designed by low-carbon (LC) low manganese microalloying, significantly reduce the banded segregation in mother metal, effectively reduce defect, it is therefore prevented that the gathering of H, make the formation of crackle be not susceptible to extension, substantially increase the corrosion resistance of tubing.Meanwhile, by optimizing weld seam and mother metal Technology for Heating Processing, reduce tubing residual stress, further increase corrosion resistance.
Accompanying drawing explanation
Fig. 1-1 is general continuous tubing shape appearance figure.
Fig. 1-2 is the resistance to H that embodiment one obtains2S corrodes continuous tubing shape appearance figure.
Fig. 2 is that the resistance to H2S of embodiment one corrodes continuous pipe HIC sample shape appearance figure.
Fig. 3 is that the resistance to H2S of embodiment one corrodes continuous pipe SCC sample shape appearance figure.
Fig. 4-1 is general continuous tubing shape appearance figure.
The resistance to H that Fig. 4-2 obtains for embodiment two2S corrodes continuous tubing shape appearance figure.
Fig. 5 is that the resistance to H2S of embodiment two corrodes continuous pipe HIC sample shape appearance figure.
Fig. 6 is that the resistance to H2S of embodiment two corrodes continuous pipe SCC sample shape appearance figure.
Detailed description of the invention:
Below the present invention is described in further detail:
Embodiment one:
1) roll bending of following composition is devised:
The steel rolling using mentioned component design is become 1100 × 3.18mm specification, heavily 20t, is about the coil of strip of 700m.
This steel main performance: yield strength 550MPa, tensile strength 642MPa, elongation percentage 34%, hardness 228HV0.5.Grain size is at ASTM E112NO.11 level, banded structure 1.0 grades.
2) this coil of strip slitting is become 9 steel bands of width 120.2mm.Steel band is butted into the steel band of overall length 6300 meters.Utilize row-roll forming process for the steel pipe of Φ 38.1 × 3.18mm specification, after weld seam heat treatment, full body destressing process, obtain the long resistance to H of 4000 meters of a dish2S corrodes continuous pipe product.
The main performance of this continuous pipe: yield strength is 595MPa, tensile strength is 668MPa, highest hardness 232HV0.5.Fig. 1-1 and Fig. 1-2 sees in tissue topography.
From Fig. 1-1 and Fig. 1-2, the resistance to H that the present embodiment obtains2S corrosion continuous tube shape tissue significantly reduces, and reduces continuous pipe at H2The danger of corrosion failure in S environment.
Testing according to NACE's NACE standard TM0284-2003, this test uses High Purity Nitrogen deoxygenation, and etchant solution is the 0.5% acetic acid+5%NaCl mixed solution that hydrogen sulfide is saturated, etchant solution distilled water and chemically pure reagent preparation.Liquor capacity and Area of Sample ratio are more than 3mL/cm2, solution temperature is maintained at 25 ± 3 DEG C.After the test of 96 hours, being carried out sample, observe, do not have crackle and bubbling to produce, after corrosion, observation figure is shown in Fig. 2.
Test according to NACE standard NACE TM 0177-1996 " metal material is resisting sulfide stress corrosion cracking method for testing performance in containing H2S environment " (being equivalent to People's Republic of China's standard GB/T4157-2006 " metal is anti-specific form environmental cracking laboratory test in hydrogen-sulfide environmental "), load mode uses static stretch method, sample applies the tensile stress that numerical value is 535MPa yield pressure, and etchant solution is the solution A (hydrogen sulfide saturated 5%NaCl+0.5% glacial acetic acid aqueous solution) of regulation in standard.Through the stress etching experiment of 720 hours, sample was unbroken, and Fig. 3 is shown in by sample.
Above content is to combine concrete preferred implementation further description made for the present invention; it cannot be assumed that the detailed description of the invention of the present invention is only limitted to this; for general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; some simple deduction or replace can also be made, all should be considered as belonging to the present invention and be determined scope of patent protection by the claims submitted to.
Embodiment two:
1) roll bending of following composition is devised:
The steel rolling using mentioned component design is become 1120 × 4.0mm specification, heavily 20t, is about the coil of strip of 570m.
This steel main performance: yield strength 470MPa, tensile strength 575MPa, elongation percentage 32%, hardness 219HV0.5.Grain size is at ASTM E112 NO.11 level, banded structure 1.0 grades.
2) this coil of strip slitting is become 7 steel bands of width 158.1mm.Steel band is butted into the steel band of overall length 3990 meters.Utilize row-roll forming process for the steel pipe of Φ 50.8 × 4.0mm specification, after weld seam heat treatment, full body destressing process, obtain the long resistance to H of 3500 meters of a dish2S corrodes continuous pipe product.
The main performance of this continuous pipe: yield strength is 515MPa, tensile strength is 595MPa, highest hardness 226HV0.5.Fig. 4-1 and Fig. 4-2 sees in tissue topography.
From Fig. 4-1 and Fig. 4-2, the resistance to H that the present embodiment obtains2S corrosion continuous tube shape tissue significantly reduces, and reduces continuous pipe at H2The danger of corrosion failure in S environment.
Testing according to NACE's NACE standard TM0284-2003, this test uses High Purity Nitrogen deoxygenation, and etchant solution is the 0.5% acetic acid+5%NaCl mixed solution that hydrogen sulfide is saturated, etchant solution distilled water and chemically pure reagent preparation.Liquor capacity and Area of Sample ratio are more than 3mL/cm2, solution temperature is maintained at 25 ± 3 DEG C.After the test of 96 hours, being carried out sample, observe, do not have crackle and bubbling to produce, after corrosion, observation figure is shown in Fig. 5.
Test according to NACE standard NACE TM 0177-1996 " metal material is resisting sulfide stress corrosion cracking method for testing performance in containing H2S environment " (being equivalent to People's Republic of China's standard GB/T4157-2006 " metal is anti-specific form environmental cracking laboratory test in hydrogen-sulfide environmental "), load mode uses static stretch method, sample applies the tensile stress that numerical value is 535MPa yield pressure, and etchant solution is the solution A (hydrogen sulfide saturated 5%NaCl+0.5% glacial acetic acid aqueous solution) of regulation in standard.Through the stress etching experiment of 720 hours, sample was unbroken, and Fig. 6 is shown in by sample.
Above content is to combine concrete preferred implementation further description made for the present invention; it cannot be assumed that the detailed description of the invention of the present invention is only limitted to this; for general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; some simple deduction or replace can also be made, all should be considered as belonging to the present invention and be determined scope of patent protection by the claims submitted to.
Claims (3)
1. a resistance to H2S corrosion pipe continuously, it is characterised in that according to mass percent: C0.03-0.06, Si
≤0.152、Mn0.15-0.55、P≤0.01、S≤0.003、Cr0.2-0.6、Mo≤0.02、Ni0.1-0.27、
V≤0.06, Ti≤0.03, Nb0.05-0.09, Fe surplus.
Resistance to H the most as claimed in claim 12S corrosion pipe continuously, it is characterised in that: described continuous pipe external diameter is
25.4-88.9mm, wall thickness 1.9-7.6mm, length is more than 61 meters, and yield strength 483-620MPa, tension is strong
Degree >=552MPa, highest hardness 248HV0.5, grain size more than ASTM E112 NO.10 level, banded structure
≤ 1.5 grades.
Resistance to H the most as claimed in claim 1 or 22S corrodes the manufacture method of continuous pipe, it is characterised in that according to
Following steps: use TMCP technique, by heating of plate blank to carrying out roughing when 1000-1300 DEG C, at 680 DEG C
-880 DEG C carry out finish rolling；Coiling temperature 350-580 DEG C, is eventually fabricated between thickness 1.9-7.6mm and meets application
The coil of strip required；Become to be suitable for the steel band produced by low for low-carbon (LC) manganese continuous tube steel volume slitting；Use Plasma Welding or
Steel band is docked to continuous pipe product Len req by other welding methods, and stays enough surpluses；After row-roll forming process,
Butt welded seam carries out 880 DEG C of-980 DEG C of heat treatments, optimizes seam organization, reduces welding stress；Subsequently to full body
Carry out 550 DEG C of-760 DEG C of destressings to process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510565775.8A CN105840919A (en) | 2015-09-08 | 2015-09-08 | Continuous pipe resistant to H2S corrosion and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510565775.8A CN105840919A (en) | 2015-09-08 | 2015-09-08 | Continuous pipe resistant to H2S corrosion and manufacturing method thereof |
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| Publication Number | Publication Date |
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| CN105840919A true CN105840919A (en) | 2016-08-10 |
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ID=56580216
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| CN201510565775.8A Pending CN105840919A (en) | 2015-09-08 | 2015-09-08 | Continuous pipe resistant to H2S corrosion and manufacturing method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113046651A (en) * | 2021-03-08 | 2021-06-29 | 中国石油天然气集团有限公司 | Corrosion-resistant X65MS steel-grade continuous tube and manufacturing method thereof |
| CN113263072A (en) * | 2021-07-19 | 2021-08-17 | 山东宏丰海洋石油装备有限公司 | Collinear production process of low-carbon microalloy and high-alloy corrosion-resistant coiled tubing |
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| CN103540834A (en) * | 2013-10-07 | 2014-01-29 | 宝鸡石油钢管有限责任公司 | X65MS/X70MS spiral submerged-arc welded pipe with excellent SSCC (Sulfide Stress Corrosion Cracking) stress corrosion resistance as well as manufacturing method thereof |
| CN103695786A (en) * | 2013-04-01 | 2014-04-02 | 宝鸡石油钢管有限责任公司 | Corrosion-resistant highly-extrusion-resistant petroleum casing and production method thereof |
| CN104357756A (en) * | 2014-10-20 | 2015-02-18 | 宝鸡石油钢管有限责任公司 | Longitudinally-welded petroleum casing pipe capable of resisting stress corrosion of hydrogen sulfide and manufacturing method thereof |
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| JP3286400B2 (en) * | 1993-06-14 | 2002-05-27 | 日新製鋼株式会社 | High corrosion resistant ferritic stainless steel and method for producing the same |
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| CN104357756A (en) * | 2014-10-20 | 2015-02-18 | 宝鸡石油钢管有限责任公司 | Longitudinally-welded petroleum casing pipe capable of resisting stress corrosion of hydrogen sulfide and manufacturing method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113046651A (en) * | 2021-03-08 | 2021-06-29 | 中国石油天然气集团有限公司 | Corrosion-resistant X65MS steel-grade continuous tube and manufacturing method thereof |
| CN113263072A (en) * | 2021-07-19 | 2021-08-17 | 山东宏丰海洋石油装备有限公司 | Collinear production process of low-carbon microalloy and high-alloy corrosion-resistant coiled tubing |
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Application publication date: 20160810 |