CN101541997A - Oil well pipe for expansion in well and two-phase stainless steel for use as oil well pipe for expansion - Google Patents
Oil well pipe for expansion in well and two-phase stainless steel for use as oil well pipe for expansion Download PDFInfo
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- CN101541997A CN101541997A CNA2008800001295A CN200880000129A CN101541997A CN 101541997 A CN101541997 A CN 101541997A CN A2008800001295 A CNA2008800001295 A CN A2008800001295A CN 200880000129 A CN200880000129 A CN 200880000129A CN 101541997 A CN101541997 A CN 101541997A
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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
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
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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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with 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
- C22C38/40—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
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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
- C22C38/40—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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- 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
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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Abstract
An oil well pipe for expansion which is expanded in a well. The oil well pipe is made of a two-phase stainless steel which has a chemical composition containing, in terms of mass%, 0.005-0.03% carbon, 0.1-1.0% silicon, 0.2-2.0% manganese, up to 0.04% phosphorus, up to 0.015% sulfur, 18.0-27.0% chromium, 4.0-9.0% nickel, up to 0.040% aluminum, and 0.05-0.40% nitrogen, with the remainder being iron and impurities, and has a structure having an austenite content of 40-90%. The oil well pipe for expansion has a yield strength of 276-655 MPa and a uniform elongation more than 20%. The oil well pipe has excellent expansibility.
Description
Technical field
The present invention relates to oil well pipe and duplex stainless steel, in more detail, relate in mine by the hole enlargement of hole enlargement oil well pipe and this hole enlargement employed duplex stainless steel of oil well pipe.
Background technology
To the well (oil well and gas well) of producing the gentle body and function of oil when excavating, a plurality of oil well pipes that generally will be called sleeve pipe (casing) insert in the mine that is excavated by drilling rod (drillpipe), prevent collapsing of mine wall.The construction process of well in the past is as described below.Beginning when utilizing drilling rod to excavate mine to predetermined distance, is inserted the 1st sleeve pipe.Then, further excavate mine regulation apart from the time, insert 2nd sleeve pipe of external diameter less than the 1st casing inner diameter.Like this, in the construction process in the past,, mine reduces gradually along with deepening the telescopic external diameter that is inserted.Therefore, it is dark more that oil well becomes, and the employed telescopic internal diameter in the top of mine (near the part face of land) is big more.Its result, excavated area increases, and excavation cost also increases.
Being used to reduce excavated area, to reduce the new construction process of excavation cost open by Japanese Unexamined Patent Application Publication 7-567610 communique and international disclosed WO98/00626 brochure.The disclosed method of these documents is as described below.At first, will have external diameter inserts in the mines less than the cannula C 3 that is provided in cannula C 1 in the mine, C2 inner diameter, ID 1.Then, the cannula C of inserting 3 is carried out hole enlargement, as shown in Figure 1, the internal diameter of cannula C 3 is equated with the inner diameter, ID 1 of the cannula C 1 that sets earlier, C2.In the method, in mine, sleeve pipe is carried out hole enlargement,, also do not need to increase excavated area even therefore the oil well of being built is dark.Therefore, can reduce excavated area.And, do not need to use large diameter sleeve pipe, also can reduce the steel pipe usage quantity.
Above-mentionedly in mine, required the performance that pipe is out of shape equably when the hole enlargement (below be called hole enlargement) like this by the oil well pipe of hole enlargement.In order to obtain excellent hole enlargement, requirement is adding the performance that does not produce the distortion of undergauge ground man-hour, that is, requirement can be by the high uniform elongation of tension test evaluation.
Particularly, as shown in Figure 1, becoming the sleeve pipe that is arranged above and below each other in the mitriform portion of repeating part (bell part) 10, enlarging rate is the highest.If consider the enlarging rate of mitriform portion, preferred hole enlargement surpasses 20% with the uniform elongation of oil well pipe.
The hole enlargement jointless oil well tube is disclosed in TOHKEMY 2005-146414 communique.The tissue of the disclosed oil well pipe of the document by ferritic phase and low temperature phase change mutually (bainite, martensite, bainite ferrite etc.) constitute, demonstrate excellent hole enlargement thus.But, be (with reference to the table 2-1 and the u-El that shows in the 2-2 of TOHKEMY 2005-146414 communique) below 20% at the uniform elongation of the test film shown in the embodiment.Therefore, above-mentioned mitriform portion might be out of shape unevenly.
Summary of the invention
The object of the present invention is to provide a kind of hole enlargement oil well pipe with excellent hole enlargement.Specifically, provide a kind of uniform elongation to surpass 20% hole enlargement oil well pipe.
The inventor begins the uniform elongation of steel grade of all kinds is investigated in order to achieve the above object.Found that with respect to the uniform elongation of carbon steel and martensitic stainless steel, the uniform elongation with duplex stainless steel of specified chemical composition enlarges markedly.
The result of further research, the inventor have found to surpass 20% hole enlargement oil well pipe in order to make uniform elongation, must satisfy following item.
(1) the austenite rate in the duplex stainless steel is 40～90%.At this, the austenite rate is measured by following method.Gather sample from hole enlargement with any place of oil well pipe.After the sample mechanical mill of gathering, with sample electrolytically etching in 30mol%KOH solution of grinding.The eyepiece that uses 25 grids is measured the austenite rate with the etched specimen surface of 400 times observation by light microscope according to the point count (point count) of ASTM E562.
(2) adjust the scope that yield strength is in 276MPa～655MPa.Be based on 0.2% endurance of ASTM standard in this so-called yield strength.As long as make hole enlargement use oil well pipe under the state that keeps solid solution, its yield strength is in above-mentioned scope.At this, so-called " state that keeps solid solution " is meant and implemented after the solution treatment, do not implement other thermal treatments and other the cold worked states except cold straightening.
The present invention is based on above-mentioned opinion and makes.Purport of the present invention is as described below.
Hole enlargement of the present invention with oil well pipe in mine by hole enlargement.Hole enlargement of the present invention is made up of duplex stainless steel with oil well pipe, this duplex stainless steel comprises that the austenite rate is 40～90% tissue and following chemical ingredients, this chemical ingredients is in quality %, contain that C:0.005～0.03%, Si:0.1～1.0%, Mn:0.2～2.0%, P:0.04% are following, S:0.015% is following, Cr:18.0～27.0%, Ni:4.0～9.0%, following, N:0.05～0.40% of Al:0.040%, remainder is made up of Fe and impurity.Hole enlargement of the present invention has the yield strength of 276MPa～655MPa with oil well pipe, has the uniform elongation greater than 20%.
Be meant the distortion (%) of the maximum load point of tension test at this so-called uniform elongation.Be meant the austenite area occupation ratio in this so-called austenite rate.
Duplex stainless steel can also contain below the Cu:2.0%.Duplex stainless steel can also contain from by below the Mo:4.0% and form below the W:5.0% group selected a kind or 2 kinds.Duplex stainless steel can also contain from by below the Ti:0.8%, below the V:1.5% and form below the Nb:1.5% group selected more than a kind or 2 kinds.Duplex stainless steel can also contain from by below the B:0.02%, below the Ca:0.02% and form below the Mg:0.02% group selected more than a kind or 2 kinds.
The duplex stainless steel of the present application is used for above-mentioned hole enlargement oil well pipe.
Description of drawings
Fig. 1 is the synoptic diagram that is used to illustrate the new construction process of the well of producing oil and gas.
Embodiment
Below embodiments of the present invention are elaborated.
The hole enlargement of embodiments of the present invention is made up of the duplex stainless steel with following chemical ingredients and metal structure with oil well pipe.% about element is meant quality % later on.
1. chemical ingredients
C：0.005～0.03％
C makes austenite stable mutually.In order to obtain this effect effectively, the C amount is more than 0.005%.On the other hand, the C amount surpasses at 0.03% o'clock, and carbide is easy to separate out, and crystal boundary erosion resistance (grain boundary corrosing resistance) worsens.Therefore, the C amount is 0.005～0.03%.
Si：0.1～1.0％
Si makes steel-deoxidizing.In order to obtain this effect effectively, the Si amount is more than 0.1%.On the other hand, the Si amount surpasses at 1.0% o'clock, promotes the generation of intermetallic compound, and its result reduces hot workability.Therefore, the Si amount is 0.1～1.0%.
Mn：0.2～2.0％
Mn makes steel-deoxidizing and desulfurization, and its result improves hot workability.Mn also increases the solid solubility of N.In order to obtain this effect effectively, the Mn amount is more than 0.2%.On the other hand, the Mn amount surpasses at 2.0% o'clock, and erosion resistance worsens.Therefore, the Mn amount is 0.2～2.0%.
Below the P:0.04%
P is an impurity, and P promotes center segregation, and resisting sulfide stress cracking (sulfidestress cracking resistance) is worsened.Therefore, preferably reduce the P amount as far as possible.Therefore, the P amount is below 0.04%.
Below the S:0.015%
S is an impurity.S reduces hot workability.Therefore preferred S amount is low.Therefore, the S amount is below 0.015%.
Cr：18.0～27.0％
Cr improves the carbon dioxide corrosion-resistant performance.As duplex stainless steel and in order to obtain sufficient carbon dioxide corrosion-resistant performance, the Cr amount is more than 18.0%.On the other hand, the Cr amount surpasses at 27.0% o'clock, promotes the generation of intermetallic compound, and its result reduces hot workability.Therefore, the Cr amount 18.0～27.0%.The Cr amount is 20.0～26.0% preferably.
Ni：4.0～9.0％
Ni makes austenite stable mutually.If the Ni amount is very few, the ferrite in the steel just too much can not get the characteristic of duplex stainless steel.The N solid solubility of ferritic phase is little, so the increase of ferrite content causes separating out of nitride, its result, erosion resistance deterioration.On the other hand, when the Ni amount was too much, the ferrite in the steel became very few, can not get the characteristic of duplex stainless steel.And, contain excessive Ni and can cause separating out of σ phase.Therefore, the Ni amount is 4.0～9.0%, and the Ni amount is 5.0～8.0% preferably.
Below the Al:0.040%
Al is effective as reductor.But the Al amount surpasses at 0.040% o'clock, and the inclusion in the steel increases, its result, and toughness and erosion resistance worsen.Therefore, the Al amount is below 0.040%.
N：0.05～0.40％
N makes austenite stable mutually.N also improves the thermostability and the erosion resistance of duplex stainless steel.In order to make the ferritic phase in the steel suitable with austenite ratio mutually, the N amount is more than 0.05%.On the other hand, the N amount surpasses at 0.40% o'clock, just produces because of the defective that ventilating pit (blow hole) causes takes place.The toughness of steel and erosion resistance worsen.Therefore, the N amount is 0.05～0.40%.The N amount is 0.1～0.35% preferably.
In addition, the remainder of invention duplex stainless steel originally is made of Fe and impurity.
The duplex stainless steel of the hole enlargement pipe for oil well use of present embodiment contains Cu also as required to substitute a part of Fe.
Below the Cu:2.0%
Cu selects element.Cu improves the erosion resistance of steel.But, contain excessive Cu and can reduce hot workability.Therefore, the Cu amount is below 2.0%.In addition, in order to obtain above-mentioned effect effectively, preferred Cu amount is more than 0.2%.Even but Cu amount less than 0.2% also can obtain above-mentioned effect to a certain extent.
The hole enlargement pipe for oil well use duplex stainless steel of present embodiment can also be as required, contains from the group who is made up of Mo and W selected a kind or 2 kinds to substitute a part of Fe.
Below the Mo:4.0%
Below the W:5.0%
Mo and W select element.These elements improve erosion resistance and anti-crevice corrosion.But, if contain excessive Mo and/or W, then σ is easy to separate out mutually, causes the embrittlement of steel.Therefore, the Mo amount is below 4.0%, and the W amount is below 5.0%.In order to obtain above-mentioned effect effectively, preferred Mo amount is more than 2.0%, and preferred W amount is more than 0.1%.But, even Mo amount, the W amount is not enough above-mentioned lower value also can to a certain degree obtain above-mentioned effect.
The hole enlargement pipe for oil well use duplex stainless steel of present embodiment also as required, contain from the group who forms by Ti, V and Nb selected more than a kind or 2 kinds to substitute a part of Fe.
Below the Ti:0.8%
Below the V:1.5%
Below the Nb:1.5%
Ti, V, Nb select element.These elements improve the intensity of steel.But, if contain excessive these elements, hot workability can reduce.Therefore, the Ti amount is below 0.8%, the V amount is below 1.5%, the Nb amount is below 1.5%.In order more effectively to obtain above-mentioned effect, preferred Ti amount is more than 0.1%.Preferred Nb amount is more than 0.05%.The Nb amount is more than 0.05%.But, even Ti, V, the Nb amount is not enough above-mentioned lower value also can to a certain degree obtain above-mentioned effect.
The hole enlargement pipe for oil well use duplex stainless steel of present embodiment also as required, contain from the group who forms by B, Ca and Mg selected more than a kind or 2 kinds to substitute a part of Fe.
Below the B:0.02%
Below the Ca:0.02%
Below the Mg:0.02%
B, Ca and Mg select element.These elements improve hot workability.But, if contain excessive these elements, the erosion resistance of steel can reduce.Therefore, B amount, Ca amount and Mg amount are respectively below 0.02%.In order more effectively to obtain above-mentioned effect, B amount, Ca amount and Mg amount are respectively more than 0.0002% preferably.But, even B, Ca, the Mg amount is not enough above-mentioned lower value also can obtain above-mentioned effect to a certain extent.
2. metal structure
Constituting hole enlargement of the present invention has by ferritic phase and the austenite metal structure formed of this two-phase mutually with the duplex stainless steel of oil well pipe.Thinking soft is the raising that austenite helps uniform elongation mutually.
Austenite rate in the steel is 40～90%.At this, the austenite rate is an area occupation ratio.Measure by the following method.Gather sample from hole enlargement with any place of oil well pipe.After the sample mechanical mill of being gathered, the sample that is ground is carried out electrolytically etching in 30mol%KOH solution.Etched specimen surface passes through 400 times observation by light microscope with the eyepiece of 25 grids, utilizes based on the point count of ASTM E562 and measures the austenite rate.
The austenite rate is as if less than 40%, and uniform elongation just is lower than below 20%.On the other hand, the austenite rate surpasses at 90% o'clock, and the erosion resistance of steel worsens.Therefore, the austenite rate is 40～90%.The austenite rate is 40～70% preferably, and better the austenite rate is 45～65%.
3. manufacture method
Hole enlargement of the present invention with oil well pipe by following manufacture method manufacturing.
The steel of the above-mentioned chemical ingredients of melting is made steel billet.Steel billet to manufacturing carries out hot-work and forms the hole enlargement oil well pipe.As hot-work, for example having implemented completely is Si Manfa.Both hot extrusion can be implemented as hot-work, also forge hot can be implemented.The manufacturing hole enlargement both can be that seamless tube also can be welded tube with oil well pipe.
Implement solution treatment to having carried out hot worked hole enlargement with oil well pipe.At this moment, solid solution temperature is 1000 ℃～2000 ℃.If 1000 ℃ of solid solution temperature less thaies, σ separates out and the steel embrittlement mutually.Because separating out of σ phase, yield strength rises, and surpassed 655MPa, so uniform elongation is below 20%.On the other hand, when solid solution temperature surpassed 1200 ℃, the austenite rate significantly reduced, less than 40%.Solid solution temperature is 1000 ℃～1175 ℃ preferably, and better solid solution temperature is 1000 ℃～1150 ℃.
Hole enlargement of the present invention keeps the state (the so-called solid solution material that keeps) of solid solution with oil well pipe.That is to say, implemented after the solution treatment, do not implement other thermal treatment and other cold working except that cold straightening (cold stretching and Pilger are rolling), just can be used as product and use.Like this, hole enlargement of the present invention keeps the state of solid solution with oil well pipe, therefore can make its yield strength be in 276MPa～655MPa (in the scope of 40ksi～95ksi).Thus, think that uniform elongation surpasses 20%, even in mine, also have excellent hole enlargement.In addition, when yield strength surpassed 655MPa, uniform elongation was below 20%.Hole enlargement needs to a certain degree intensity with oil well pipe, so its yield strength is more than the 276MPa.
In addition, after solution treatment, implement under the cold worked situation, yield strength surpasses 655MPa.Therefore, the uniform elongation less than 20%.
Embodiment 1
Melting has a plurality of steel of the chemical ingredients shown in the table 1, makes steel billet.Steel billet to manufacturing carries out forge hot and hot rolling system, forms a plurality of test steel plates with thickness 30mm, width 120mm, length 300mm.
Table 1
The steel grade of each test number is represented on " tissue " hurdle in the table 1." D " represents duplex stainless steel, and " C " represents carbon steel." M " represents martensitic stainless steel.With reference to table 1, test number 1～11 and 21～23 is a duplex stainless steel.Numbering 12～14 is a carbon steel, and test number 15～20 is a martensitic stainless steel.
The steel plate of test number 1～23 has been implemented the thermal treatment and the cold working of " thermal treatment " hurdle record in the table 1.Specifically, the steel plate of test number 1～11 has been implemented solution treatment (" thermal treatment " hurdle in the table 1 is shown as " solid solution ") 1050 ℃～1150 ℃ temperature range.The solid solution temperature of each steel plate is presented at table 1 " solid solubility temperature " hurdle.The steel plate of test number 1～11 does not carry out other thermal treatment and cold working such as cold stretching after solution treatment, formed so-called maintenance solid solution material.
Steel plate to test number 12～20 is implemented to quench with 920 ℃, implements tempering (" thermal treatment " hurdle in the table 1 is shown as " QT ") 550～730 ℃ temperature ranges.Steel plate to test number 21 has been implemented solution treatment with the temperature of 1000 ℃ of less thaies, and the steel plate of test number 22 has been implemented solution treatment with the temperature above 1200 ℃.Test number 21 and 22 steel plate are for keeping the solid solution material.To the steel plate of test number 23, after 1085 ℃ temperature enforcement solution treatment, implemented cold stretching.
The measurement of austenite rate
Test number 1～11 and 21～23 the steel plate of being made up of duplex stainless steel are obtained the austenite rate after thermal treatment.Specifically, from these steel plates difference acquisition test sheets.The test film of gathering is carried out mechanical mill, the test film after grinding has been carried out electrolytically etching in 30mol%KOH solution.Specimen surface after the etching is with the eyepiece of 25 grids, by 400 times observation by light microscope 16 visual fields.In each visual field of observing, obtained austenite rate (%).The austenite rate is by obtaining based on the ASTME562 point count.The mean value of the austenite rate of obtaining in each visual field (%) is shown as " γ amount " hurdle in the table 1.
Tension test
Along the length direction collection external diameter 6.35mm of each steel plate 1～23, the pole test film of parallel portion length 25.4mm, implemented tension test at normal temperatures.The resulting yield strength of tension test (MPa) is presented at " YS " hurdle in the table 1, tensile strength (MPa) is presented at " TS " hurdle in the table 1, uniform elongation (%) is presented at " uniform elongation " hurdle in the table 1.2% endurance based on the ASTM standard is yield strength (YS).The test film of the maximum load point of tension test be deformed into uniform elongation (%).
Test-results
With reference to table 1, the chemical ingredients of the steel plate of test number 1～11, metal structure and yield strength are in the scope of the present invention, so uniform elongation all surpasses 20%.
On the other hand, the steel plate of test number 12～20 is not a duplex stainless steel, so uniform elongation all is below 20%.
The steel plate of test number 21 is a duplex stainless steel, and its chemical ingredients is in the scope of the present invention, but 1000 ℃ of solid solution temperature less thaies.Therefore, yield strength surpasses the upper limit of the scope of the invention, and uniform elongation is below 20%.Think that solid solution temperature is low, so σ separates out the yield strength rising mutually.
The solid solution temperature of the steel plate of test number 22 surpasses 1200 ℃, therefore, austenite rate less than 40%, uniform elongation is below 20%.The steel plate of test number 23 is not to keep the solid solution material, has carried out cold working after solution treatment, so yield strength surpasses the upper limit of the scope of the invention, and uniform elongation is below 20%.
More than, embodiments of the present invention have been described, but above-mentioned embodiment only is used to implement illustration of the present invention.Therefore, the invention is not restricted to above-mentioned embodiment, in the scope that does not break away from its purport, can suitably be out of shape and implement above-mentioned embodiment.
Industrial applicibility
Hole enlargement of the present invention can be used as the oil well pipe utilization with oil well pipe and two phase stainless steel, Particularly can be used as in mine by the oil well pipe of hole enlargement.
Claims (10)
1. hole enlargement oil well pipe, in mine by hole enlargement, it is characterized in that, this hole enlargement is made up of duplex stainless steel with oil well pipe, this duplex stainless steel comprises that the austenite rate is 40～90% tissue and following chemical ingredients, this chemical ingredients is in quality %, contain C:0.005～0.03%, Si:0.1～1.0%, Mn:0.2～2.0%, below the P:0.04%, below the S:0.015%, Cr:18.0～27.0%, Ni:4.0～9.0%, below the Al:0.040%, N:0.05～0.40%, remainder is made up of Fe and impurity, this hole enlargement has the yield strength of 276MPa～655MPa with oil well pipe, has the uniform elongation greater than 20%.
2. hole enlargement oil well pipe according to claim 1 is characterized in that,
Above-mentioned duplex stainless steel also contains below the Cu:2.0%.
3. hole enlargement oil well pipe according to claim 1 and 2 is characterized in that,
Above-mentioned duplex stainless steel also contain from by below the Mo:4.0% and form below the W:5.0% group selected a kind or 2 kinds.
4. according to each described hole enlargement oil well pipe in the claim 1～3, it is characterized in that,
Above-mentioned duplex stainless steel also contain from by below the Ti:0.8%, below the V:1.5% and form below the Nb:1.5% group selected more than a kind or 2 kinds.
5. according to each described hole enlargement oil well pipe in the claim 1～4, it is characterized in that, above-mentioned duplex stainless steel also contain from by below the B:0.02%, below the Ca:0.02% and form below the Mg:0.02% group selected more than a kind or 2 kinds.
6. a hole enlargement is with the employed duplex stainless steel of oil well pipe, be by the hole enlargement of the hole enlargement employed duplex stainless steel of oil well pipe in mine, it is characterized in that, this duplex stainless steel is in quality %, contain C:0.005～0.03%, Si:0.1～1.0%, Mn:0.2～2.0%, below the P:0.04%, below the S:0.015%, Cr:18.0～27.0%, Ni:4.0～9.0%, below the Al:0.040%, N:0.05～0.40%, remainder is made up of Fe and impurity, the austenite rate is 40～90%, this duplex stainless steel has the yield strength of 276MPa～655MP a, has the uniform elongation greater than 20%.
7. duplex stainless steel according to claim 6 is characterized in that,
Above-mentioned duplex stainless steel also contains below the Cu:2.0%.
8. according to claim 6 or 7 described duplex stainless steels, it is characterized in that,
Above-mentioned duplex stainless steel also contain from by below the Mo:4.0% and form below the W:5.0% group selected a kind or 2 kinds.
9. according to each described duplex stainless steel in the claim 6～8, it is characterized in that,
Above-mentioned duplex stainless steel also contain from by below the Ti:0.8%, below the V:1.5% and form below the Nb:1.5% group selected more than a kind or 2 kinds.
10. according to each described duplex stainless steel in the claim 6～9, it is characterized in that, above-mentioned duplex stainless steel also contain from by below the B:0.02%, below the Ca:0.02% and form below the Mg:0.02% group selected more than a kind or 2 kinds.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007078691 | 2007-03-26 | ||
| JP078691/2007 | 2007-03-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101541997A true CN101541997A (en) | 2009-09-23 |
Family
ID=39788416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008800001295A Pending CN101541997A (en) | 2007-03-26 | 2008-03-14 | Oil well pipe for expansion in well and two-phase stainless steel for use as oil well pipe for expansion |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US20090032246A1 (en) |
| EP (1) | EP1995341A4 (en) |
| JP (1) | JPWO2008117680A1 (en) |
| CN (1) | CN101541997A (en) |
| AR (1) | AR067233A1 (en) |
| AU (1) | AU2008207596A1 (en) |
| BR (1) | BRPI0802616A2 (en) |
| CA (1) | CA2638289C (en) |
| EA (1) | EA013146B1 (en) |
| MX (1) | MX2008012238A (en) |
| UA (1) | UA90217C2 (en) |
| WO (1) | WO2008117680A1 (en) |
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| CN105478524A (en) * | 2016-01-06 | 2016-04-13 | 河北华通线缆集团股份有限公司 | Method for manufacturing duplex stainless steel coiled tubing |
| CN105980592A (en) * | 2014-02-03 | 2016-09-28 | 奥托库姆普有限公司 | Duplex stainless steel |
| CN110983191A (en) * | 2019-12-31 | 2020-04-10 | 九牧厨卫股份有限公司 | High-corrosion-resistance stainless steel plate, stainless steel trough and preparation method thereof |
| CN111057967A (en) * | 2019-12-31 | 2020-04-24 | 九牧厨卫股份有限公司 | High-corrosion-resistance and scratch-resistance stainless steel plate, stainless steel trough and preparation method thereof |
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-
2008
- 2008-03-14 CN CNA2008800001295A patent/CN101541997A/en active Pending
- 2008-03-14 JP JP2009506286A patent/JPWO2008117680A1/en active Pending
- 2008-03-14 EP EP08722143A patent/EP1995341A4/en not_active Withdrawn
- 2008-03-14 BR BRPI0802616-5A patent/BRPI0802616A2/en not_active Application Discontinuation
- 2008-03-14 UA UAA200811652A patent/UA90217C2/en unknown
- 2008-03-14 AU AU2008207596A patent/AU2008207596A1/en not_active Abandoned
- 2008-03-14 MX MX2008012238A patent/MX2008012238A/en not_active Application Discontinuation
- 2008-03-14 CA CA2638289A patent/CA2638289C/en not_active Expired - Fee Related
- 2008-03-14 WO PCT/JP2008/054747 patent/WO2008117680A1/en active Application Filing
- 2008-03-14 EA EA200870307A patent/EA013146B1/en not_active IP Right Cessation
- 2008-03-19 AR ARP080101165A patent/AR067233A1/en unknown
- 2008-09-29 US US12/285,032 patent/US20090032246A1/en not_active Abandoned
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266281A (en) * | 2013-05-24 | 2013-08-28 | 无锡鑫常钢管有限责任公司 | Super double-phase stainless steel tube and production process thereof |
| CN105980592A (en) * | 2014-02-03 | 2016-09-28 | 奥托库姆普有限公司 | Duplex stainless steel |
| CN105478524A (en) * | 2016-01-06 | 2016-04-13 | 河北华通线缆集团股份有限公司 | Method for manufacturing duplex stainless steel coiled tubing |
| CN105478524B (en) * | 2016-01-06 | 2017-07-28 | 河北华通线缆集团股份有限公司 | A kind of manufacture method of two phase stainless steel coiled tubing |
| CN110983191A (en) * | 2019-12-31 | 2020-04-10 | 九牧厨卫股份有限公司 | High-corrosion-resistance stainless steel plate, stainless steel trough and preparation method thereof |
| CN111057967A (en) * | 2019-12-31 | 2020-04-24 | 九牧厨卫股份有限公司 | High-corrosion-resistance and scratch-resistance stainless steel plate, stainless steel trough and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| BRPI0802616A2 (en) | 2011-08-30 |
| CA2638289A1 (en) | 2008-09-26 |
| EP1995341A4 (en) | 2010-03-10 |
| EP1995341A1 (en) | 2008-11-26 |
| UA90217C2 (en) | 2010-04-12 |
| JPWO2008117680A1 (en) | 2010-07-15 |
| US20090032246A1 (en) | 2009-02-05 |
| WO2008117680A1 (en) | 2008-10-02 |
| EA200870307A1 (en) | 2009-02-27 |
| CA2638289C (en) | 2011-08-30 |
| EA013146B1 (en) | 2010-02-26 |
| AU2008207596A1 (en) | 2008-10-16 |
| MX2008012238A (en) | 2008-11-28 |
| AR067233A1 (en) | 2009-10-07 |
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