CN103882371B - A kind of oil well pipe and preparation method thereof - Google Patents

A kind of oil well pipe and preparation method thereof Download PDF

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Publication number
CN103882371B
CN103882371B CN201410115393.0A CN201410115393A CN103882371B CN 103882371 B CN103882371 B CN 103882371B CN 201410115393 A CN201410115393 A CN 201410115393A CN 103882371 B CN103882371 B CN 103882371B
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oil well
well pipe
ion
penetration enhancer
time
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CN103882371A (en
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罗德福
漆世荣
李信
鲁伟员
王强
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Hunan Hongyu Intelligent Manufacturing Co. Ltd.
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Sichuan Zhongwu Hongyu Science And Technology Co Ltd
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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
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F16L58/04—Coatings characterised by the materials used
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C12/00—Solid state diffusion of at least one non-metal element other than silicon and at least one metal element or silicon into metallic material surfaces

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)
  • Earth Drilling (AREA)
  • Detergent Compositions (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

The present invention relates to oil, natural gas extraction field, in particular to a kind of oil well pipe and preparation method thereof.Wherein, this oil well pipe, including oil well pipe matrix, the surface of oil well pipe matrix has compound layer and metal oxide layer the most successively, and compound layer uses nitrogen carbon ruthenium ion penetration enhancer, ion activation penetration enhancer, oxonium ion penetration enhancer to penetrate into metal oxide layer successively by oil well pipe matrix and formed.Oil well pipe that the present invention provides and preparation method thereof, compared with oil well pipe of the prior art, nonmetalloid and minor metallic element are penetrated into the corrosion-resistant coating of outer wall formation within it in oil well pipe entirety, this method can withstand the corrosion of various Korrosionsmedium, steady quality and will not be to environment.

Description

A kind of oil well pipe and preparation method thereof
Technical field
The present invention relates to oil, natural gas extraction field, in particular to a kind of oil well pipe and preparation method thereof.
Background technology
In oil, gas exploitation course, will use a large amount of oil well pipe, oil well pipe is embedded in down-hole for a long time, stands various The corrosion of Korrosionsmedium, H in oil well2S、CO2、O2And the medium such as acid-alkali salt is the most serious to the corrosion failure of oil well pipe , therefore, people constantly study the corrosion mechanism of oil well pipe and take corresponding anticorrosive measure.
At present, the method improving oil well pipe anti-corrosion capability mainly has: 1) coat of metal antisepsis, as zinc-plated, and chromium plating etc.； 2) the coated antisepsis of nonmetallic materials, such as coating tar Colophonium, solvent reducible coatings, powdery paints etc.；3) metal and nonmetalloid Infiltration method, as penetrated into aluminum, chromium, sulfur, nitrogen, the element such as boron；4) electrochemical protection；5) microbiologic(al) corrosion method is prevented.These sides Method all can improve petroleum pipeline decay resistance, but cannot preferably stand the corrosion of various Korrosionsmedium.
Summary of the invention
It is an object of the invention to provide a kind of oil well pipe and preparation method thereof, to solve above-mentioned problem.
A kind of oil well pipe, including oil well pipe matrix, the surface of described oil well pipe matrix has compound the most successively Layer and metal oxide layer, described compound layer and metal oxide layer are that described oil well pipe matrix uses nitrogen carbon ruthenium ion to ooze successively Agent, ion activation penetration enhancer, oxonium ion penetration enhancer penetrate into and are formed；
Wherein said nitrogen carbon ruthenium ion penetration enhancer includes following components: Na by weight percentage2CO310%-15%, K2CO310%-20%, NaCl20%-25%, CO (NH2)230%-40%, K2SO31%-3%, CeCO3L%-3%, LiOH5%-10%, YCl30.03-1%；
Described ion activation penetration enhancer includes following components: Na by weight percentage2S045%-10%, Na2CO310%- 20%, K2CO310%-20%, NaCl20%-25%, CO (NH2)230%-40%, K2SO31%-3%, CeCO3L%-3%, LiOH5%-10%, KCl3%-5%；
Described oxonium ion penetration enhancer includes following components: Na by weight percentage2CO320%-30%, NaNO220%- 30%, NaNO330%-40%, CeSO410%-20%.
In the present invention, oil well pipe matrix shows to process through nitrogen carbon ruthenium ion penetration enhancer, and the ion in nitrogen carbon ruthenium ion penetration enhancer exists Oil well pipe surface forms the infiltration layer of expection thickness, and this infiltration layer is by the nitrogen carbon compound of metallic element and nitrogen solid solution in ferrum Composition, has high anti-corrosion characteristic.
Afterwards, through active ion penetration enhancer activate further and to oil well pipe matrix direction spread, again complete diffusion and Adsorption process, adjusts the ratio of metallic element nitrogen carbon compound and increases compisite seeping layer thickness, thus improving the anti-tired of oil well pipe Labor performance.
Finally, processed by oxonium ion penetration enhancer infiltration, residue in nitrogen carbon ruthenium ion penetration enhancer and the oxonium ion on oil well pipe surface Penetration enhancer reaction, the infiltration layer formed are that a part of oxygen dissolves in compound lattice with gap form, and another part oxygen is formed on surface Metal oxide layer, thus improve the anti-corrosion resisting property of oil well pipe further.
The present invention is by by the surface of nonmetalloid and minor metallic element infiltration oil-feed well casing matrix, at oil well pipe The surface of matrix forms compound layer and metal oxide layer, not only drastically increases the corrosion resistance of oil well pipe, and processes After oil well pipe also there is good mechanical property, and cost performance is high, not pollutes environment.
In penetration enhancer used by the present invention, beneficial activity ion stability is good, along with controlled ion penetrates into the carrying out that (PIP) processes, The decline of active ion concentration presents certain rule, is analyzed ion concentration by chemical analysis detection means, can be quantitatively The concentration of active ion in regulation penetration enhancer, simultaneously by changing infiltration temperature and the time of infiltration, can effectively control in compisite seeping layer The ratio of thing phase, and obtain intended alloying layer thickness.
Preferably, nitrogen carbon ruthenium ion penetration enhancer includes following components: Na by weight percentage2CO310%-12%, K2CO310%-15%, NaCl22%-25%, CO (NH2)235%-40%, K2SO31%-3%, CeCO3L%-3%, LiOH8%-10%, YCl30.03-0.05%.
Preferably, ion activation penetration enhancer includes following components: Na by weight percentage2S045%-8%, Na2CO310%-15%, K2CO310%-15%, NaCl20%-22%, CO (NH2)230%-35%, K2SO32%-3%, CeCO32%-3%, LiOH8%-10%, KCl4%-5%.
Preferably, oxonium ion penetration enhancer includes following components: Na by weight percentage2CO325%-28%, NaNO225%- 28%, NaNO332%-38%, CeSO415%-18%.
Preferably, the oil well pipe that the present invention prepares has a following performance advantage: compound layer and metal oxide layer Thickness is: 40-60 μm, and hardness is 550 650Hv.
Preferably, temperature resistance ability is obvious, can be used below at 500 DEG C for a long time.
Present invention also offers the preparation method of a kind of described oil well pipe, comprised the steps:
(A) preheating: oil well pipe enters air-heating furnace preheating, and temperature is 300-450 DEG C, time 20-40min；Preheating Being to dry the moisture remaining in oil well pipe surface, after making oil well pipe process, outward appearance is more consistent, does not produce surface defect, simultaneously Preheat the infiltration to element and also have certain catalytic action；
(B) nitrogen carbon ruthenium ion penetrates into: preheated oil well pipe enter nitrogen carbon ruthenium ion penetrate into stove through described nitrogen carbon yttrium from Sub-penetration enhancer infiltration processes, and temperature is 550-660 DEG C, and the time is 30-120min；Active ion in nitrogen carbon ruthenium ion penetration enhancer divides Solve, spread and in adsorption process, form the infiltration layer of expection thickness at oil well pipe matrix surface；This infiltration layer is by the nitrogen of metallic element Carbon compound and the nitrogen solid solution composition in ferrum, has high anti-corrosion characteristic；
(C) ion activation: the oil well pipe penetrated into by nitrogen carbon ruthenium ion enters ion activation stove, through described ion activation Penetration enhancer infiltration processes, and temperature is 450-550 DEG C, and the time is 30-120min；The active ion being adsorbed in oil well pipe matrix surface enters One step activates and to oil well pipe matrix direction, again completes diffusion and adsorption process, adjusts the ratio of nitrogen carbon compound further The thickness of example and further increase infiltration layer, thus improve the performance of oil well pipe resisting fatigue；
(D) oxonium ion penetrate into: through ion activation oil well pipe enter oxonium ion penetrate into stove ooze through described oxonium ion penetration enhancer Entering to process, temperature is 370-430 DEG C, and the time is 15-30min；Residue in the nitrogen carbon ruthenium ion penetration enhancer on oil well pipe surface and oxygen from Son penetrates into the penetration enhancer reaction in stove, the infiltration layer of formation is that a part of oxygen dissolves in compound lattice with gap form, another part Oxygen forms metal oxide layer on surface；
(E) clean afterwards: remove oil well pipe surface penetration enhancer, clean up with water, dry or naturally dry；
(F) ion stabilizedization: oil well pipe enters the ion stabilizer of ion stabilizedization stove splendid attire and carries out ion stabilizedization, Temperature is 120-200 DEG C, and the time is 20-50min, and described ion stabilizer includes following components by weight percentage: alkane 80- 93%, cycloalkane 5-15%, polyolefin 1-5%, Matrii Sulfas Exsiccatus 0.2-1%；Operation before is combined by the process of ion stabilizedization Infiltration layer carries out stabilizing and increasing the consistency of infiltration layer.
(G) oil well pipe through ion stabilizedization enters the oil groove containing 10-20# machine oil, immersion oil time 3-10min, enters one Step increases its corrosion resistance.
The method of the present invention by penetrating into the surface of oil-feed well casing matrix by nonmetalloid and minor metallic element, at oil The surface of well casing matrix forms compound layer and metal oxide layer, makes the surface of oil well pipe matrix form anticorrosion antiwear layer, not only Drastically increase the oil well pipe after the corrosion resistance of oil well pipe, and process and also there is good mechanical property, and cost performance is high, And owing to when oxonium ion penetrates into, the harmful ion such as cyanogen root of surface residual is the most oxidized, generates nuisanceless to environment Carbonate material, it is achieved thereby that protection environment purpose.
Preferably, further comprising the steps of before step (A): oil well pipe to be carried out front cleaning: remove oil well pipe surface Greasy dirt and surface rusty stain, be then installed: oil well pipe is loaded frock.
Preferably, in step (A), oil well pipe carries out pre-warmed temperature and is 400-450 DEG C, and the time is 30-35min.
Preferably, in step (B), the temperature that oil well pipe processes through nitrogen carbon ruthenium ion penetration enhancer infiltration is 600-650 DEG C, the time For 80-100min.
Preferably, in step (C), the temperature that oil well pipe processes through ion activation penetration enhancer infiltration is 500-550 DEG C, and the time is 80-100min。
Preferably, in step (D), the temperature that oil well pipe processes through oxonium ion penetration enhancer infiltration is 400-420 DEG C, and the time is 20-25min。
In the present invention, step (A) uses the pre-heat energy of air-heating furnace strengthen in pre-heat effect, step (B) and use nitrogen carbon Ruthenium ion infiltration stove carries out infiltration and processes temperature and the time of can preferably controlling, and strengthens the effect that infiltration processes, step (C) Middle employing ion activation stove preferably to control temperature and the time that ion activation infiltration processes, step (D) uses oxygen from Son penetrates into stove can preferably control temperature and the time that oxonium ion infiltration processes so that the oil well pipe finally given has more Good anti-corrosive properties and excellent mechanical property.
Oil well pipe that the embodiment of the present invention provides and preparation method thereof, compared with oil well pipe of the prior art, by non-gold Belonging to element and minor metallic element penetrates into the corrosion-resistant coating of outer wall formation within it in oil well pipe entirety, this method can stand Live the corrosion of various Korrosionsmediums, steady quality and will not be to environment.
Accompanying drawing explanation
Fig. 1 shows the oil well pipe structure sectional view of the embodiment of the present invention；
Fig. 2 shows the oil well pipe structure front view of the embodiment of the present invention；
Fig. 3 shows the oil well pipe structural representation of the embodiment of the present invention；
Reference: 1 compound layer, 2 metal oxide layers.
Detailed description of the invention
Below by specific embodiment and combine accompanying drawing the present invention is described in further detail.
Embodiment 1:
The preparation method of oil well pipe:
(A) it is to carry out at a temperature of 300 DEG C preheating 20min by oil well pipe that material is N80 in temperature；
(B) being processed through nitrogen carbon ruthenium ion penetration enhancer infiltration by the oil well pipe after above-mentioned heating, operation temperature is 550 DEG C, the time For 30min；Wherein nitrogen carbon ruthenium ion penetration enhancer includes following components: Na by weight percentage2CO310%, K2CO320%, NaCl23%, CO (NH2)240%, K2SO31%, CeCO3L%, LiOH4%, YCl31%；
(C) oil well pipe above-mentioned steps processed processes through ion activation penetration enhancer infiltration, and operation temperature is 450 DEG C, time Between be 30min；Ion activation penetration enhancer includes following components: Na by weight percentage2S0410%, Na2CO310%, K2CO310%, NaCl20%, CO (NH2)240%, K2SO31%, CeCO3L%, LiOH5%, KCl3%；
(D) again oil well pipe is processed and by having successively outside interior on the surface of oil well pipe through oxonium ion penetration enhancer infiltration Compound layer 1 and metal oxide layer 2, operation temperature is 370 DEG C, and the time is 15min；Oxonium ion penetration enhancer wraps by weight percentage Include following components: Na2CO320%, NaNO220%, NaNO340%, CeSO420%；
(E) remove oil well pipe surface penetration enhancer, clean up with water, dry；
(F) being processed through ion stabilizedization by oil well pipe, operation temperature is 120 DEG C, and the time is 30min；Ion stabilizer is pressed Percentage by weight includes following components: alkane 80%, cycloalkane 15%, polyolefin 4%, Matrii Sulfas Exsiccatus 1%；
(G) oil well pipe through ion stabilizedization enters the oil groove containing 10# machine oil, immersion oil time 3min；
The oil well pipe prepared through said method as Figure 1-3, compound layer and the thickness of described metal oxide layer Degree is 35 μm, and hardness is 500Hv, can be used below at 500 DEG C for a long time, and it is 60mm that weld seam processes width.
Embodiment 2:
The preparation method of oil well pipe:
(A) oil well pipe that material is N80 is carried out front cleaning: remove oil well pipe surface and oil contaminant and surface rusty stain and be installed: Oil well pipe is loaded frock；
(B) it is to carry out at a temperature of 450 DEG C preheating 40min by oil well pipe in temperature；
(C) being processed through nitrogen carbon ruthenium ion penetration enhancer infiltration by the oil well pipe after above-mentioned heating, operation temperature is 660 DEG C, the time For 120min；Wherein nitrogen carbon ruthenium ion penetration enhancer includes following components: Na by weight percentage2CO315%, K2CO319%, NaCl20%, CO (NH2)230%, K2SO33%, CeCO33%, LiOH9.97%, YCl30.03%；
(D) oil well pipe above-mentioned steps processed processes through ion activation penetration enhancer infiltration, and operation temperature is 550 DEG C, time Between be 120min；Ion activation penetration enhancer includes following components: Na by weight percentage2S045%, Na2CO312%, K2CO312%, NaCl25%, CO (NH2)230%, K2SO33%, CeCO33%, LiOH10%, KCl5%；
(E) again oil well pipe is processed and by having successively outside interior on the surface of oil well pipe through oxonium ion penetration enhancer infiltration Compound layer 1 and metal oxide layer 2, operation temperature is 430 DEG C, and the time is 30min；Oxonium ion penetration enhancer wraps by weight percentage Include following components: Na2CO330%, NaNO230%, NaNO330%, CeSO410%；
(F) remove oil well pipe surface penetration enhancer, clean up with water, naturally dry；
(G) being processed through ion stabilizedization by oil well pipe, operation temperature is 200 DEG C, and the time is 50min；Ion stabilizer is pressed Percentage by weight includes following components: alkane 93%, cycloalkane 5%, polyolefin 1.8%, Matrii Sulfas Exsiccatus 0.2%；
(H) oil well pipe through ion stabilizedization enters the oil groove containing 20# machine oil, immersion oil time 9min；
The oil well pipe prepared through said method as Figure 1-3, compound layer and the thickness of described metal oxide layer Degree is 60 μm, and hardness is 650Hv, can be used below at 500 DEG C for a long time.
Embodiment 3:
The preparation method of oil well pipe:
(A) oil well pipe that material is N80 is carried out front cleaning: remove oil well pipe surface and oil contaminant and surface rusty stain and be installed: Oil well pipe is loaded frock；
(B) it is to carry out at a temperature of 400 DEG C preheating 30min by oil well pipe in temperature；
(C) being processed through nitrogen carbon ruthenium ion penetration enhancer infiltration by the oil well pipe after above-mentioned heating, operation temperature is 650 DEG C, the time For 80min；Wherein nitrogen carbon ruthenium ion penetration enhancer includes following components: Na by weight percentage2CO312%, K2CO315%, NaCl23%, CO (NH2)235%, K2SO33%, CeCO33%, LiOH8.5%, YCl30.05%；
(D) oil well pipe above-mentioned steps processed processes through ion activation penetration enhancer infiltration, and operation temperature is 500 DEG C, time Between be 100min；Ion activation penetration enhancer includes following components: Na by weight percentage2S046%, Na2CO310%, K2CO311%, NaCl22%, CO (NH2)235%, K2SO32%, CeCO32%, LiOH8%, KCl4%；
(E) again oil well pipe is processed and by having successively outside interior on the surface of oil well pipe through oxonium ion penetration enhancer infiltration Compound layer 1 and metal oxide layer 2, operation temperature is 400 DEG C, and the time is 20min；Oxonium ion penetration enhancer wraps by weight percentage Include following components: Na2CO325%, NaNO225%, NaNO332%, CeSO418%；
(F) remove oil well pipe surface penetration enhancer, clean up with water, naturally dry；
(G) being processed through ion stabilizedization by oil well pipe, operation temperature is 150 DEG C, and the time is 40min；Ion stabilizer is pressed Percentage by weight includes following components: alkane 93%, cycloalkane 5%, polyolefin 1%, Matrii Sulfas Exsiccatus 1%；
(H) oil well pipe through ion stabilizedization enters the oil groove containing 20# machine oil, immersion oil time 10min；
Through the oil well pipe that said method is prepared, the thickness of compound layer and described metal oxide layer is 50 μm, firmly Degree is 600Hv, can be used below at 500 DEG C for a long time.
Embodiment 4:
The preparation method of oil well pipe:
(A) oil well pipe that material is N80Q is carried out front cleaning: remove oil well pipe surface and oil contaminant and surface rusty stain and be installed: Oil well pipe is loaded frock；
(B) it is to carry out at a temperature of 420 DEG C preheating 32min by oil well pipe in temperature；
(C) being processed through nitrogen carbon ruthenium ion penetration enhancer infiltration by the oil well pipe after above-mentioned heating, operation temperature is 600 DEG C, the time For 100min；Wherein nitrogen carbon ruthenium ion penetration enhancer includes following components: Na by weight percentage2CO315%, K2CO310%, NaCl21%, CO (NH2)239%, K2SO33%, CeCO33%, LiOH8%, YCl31%；
(D) oil well pipe above-mentioned steps processed processes through ion activation penetration enhancer infiltration, and operation temperature is 520 DEG C, time Between be 80min；Ion activation penetration enhancer includes following components: Na by weight percentage2S045%, Na2CO320%, K2CO315%, NaCl20%, CO (NH2)230%, K2SO31%, CeCO31%, LiOH5%, KCl3%；
(E) again oil well pipe is processed and by having successively outside interior on the surface of oil well pipe through oxonium ion penetration enhancer infiltration Compound layer 1 and metal oxide layer 2, operation temperature is 420 DEG C, and the time is 25min；Oxonium ion penetration enhancer wraps by weight percentage Include following components: Na2CO328%, NaNO225%, NaNO332%, CeSO415%；
(F) remove oil well pipe surface penetration enhancer, clean up with water, naturally dry；
(G) being processed through ion stabilizedization by oil well pipe, operation temperature is 180 DEG C, and the time is 40min；Ion stabilizer is pressed Percentage by weight includes following components: alkane 89%, cycloalkane 5%, polyolefin 5%, Matrii Sulfas Exsiccatus 1%；
(H) oil well pipe through ion stabilizedization enters the oil groove containing 20# machine oil, immersion oil time 8min；
Through the oil well pipe that said method is prepared, the thickness of compound layer and described metal oxide layer is 40 μm, firmly Degree is 580Hv, can be used below at 500 DEG C for a long time.
Embodiment 5
The preparation method of oil well pipe:
(A) oil well pipe that material is N80Q is carried out front cleaning: remove oil well pipe surface and oil contaminant and surface rusty stain and be installed: Oil well pipe is loaded frock；
(B) it is to carry out at a temperature of 420 DEG C preheating 32min by oil well pipe in temperature；
(C) being processed through nitrogen carbon ruthenium ion penetration enhancer infiltration by the oil well pipe after above-mentioned heating, operation temperature is 600 DEG C, the time For 100min；Wherein nitrogen carbon ruthenium ion penetration enhancer includes following components: Na by weight percentage2CO312%, K2CO310%, NaCl25%, CO (NH2)238%, K2SO33%, CeCO33%, LiOH8%, YCl31%；
(D) oil well pipe above-mentioned steps processed processes through ion activation penetration enhancer infiltration, and operation temperature is 520 DEG C, time Between be 80min；Ion activation penetration enhancer includes following components: Na by weight percentage2S045%, Na2CO315%, K2CO320%, NaCl20%, CO (NH2)230%, K2SO31%, CeCO31%, LiOH5%, KCl3%；
(E) again oil well pipe is processed and by having successively outside interior on the surface of oil well pipe through oxonium ion penetration enhancer infiltration Compound layer 1 and metal oxide layer 2, operation temperature is 420 DEG C, and the time is 25min；Oxonium ion penetration enhancer wraps by weight percentage Include following components: Na2CO328%, NaNO220%, NaNO338%, CeSO414%；
(F) remove oil well pipe surface penetration enhancer, clean up with water, naturally dry；
(G) being processed through ion stabilizedization by oil well pipe, operation temperature is 120 DEG C, and the time is 50min；Ion stabilizer is pressed Percentage by weight includes following components: alkane 89%, cycloalkane 5%, polyolefin 5%, Matrii Sulfas Exsiccatus 1%；
(H) oil well pipe through ion stabilizedization enters the oil groove containing 20# machine oil, immersion oil time 8min；
Through the oil well pipe that said method is prepared, the thickness of compound layer and described metal oxide layer is 40 μm, firmly Degree is 580Hv, can be used below at 500 DEG C for a long time.
Embodiment 6:
Take the oil well pipe that the preparation method of embodiments of the invention 1-3 prepares respectively and carry out hydrogen sulfide corrosion resistant examination Test.
Examination criteria uses " acid-soluble oil gas field drilling well drilling rod specification ", tests (A by the A method of NACETM0177 standard Solution), loading force is 441.6N/mm2(80%Rt0.5), specifically through 720 hours at test temperature 24 ± 3 DEG C, specifically try Test result and see table 1.
Table 1 test result
Specimen coding Proof stress (N/mm2) Protracted test time (h) F (cracking)/NF (cracking)
1 441.6 720 NF
2 441.6 720 NF
3 441.6 720 NF
Wherein: sample 1 is the product of the embodiment of the present invention 1；
Sample 2 is the product of the embodiment of the present invention 2；
Sample 3 is the product of the embodiment of the present invention 3；
As can be seen from the table, after test in 720 hours, three oil well pipes all ftracture, and the side of the present invention is described Oil well pipe performance prepared by method can reach application request, meets the indices that API specifies.
Embodiment 7:
In the oil well pipe that the method for the embodiment of the present invention 2 is prepared and prior art through Nitrizing Treatment oil well pipe with And untreated oil well pipe (material is N80) carries out CO on time and temperature2Anticorrosive contrast, the wherein oil well of Nitrizing Treatment The processing method of pipe is: the petroleum pipeline that material is N80 is used the enforcement in CN102560507A description detailed description of the invention The Nitrizing Treatment method of example 1 carries out Nitrizing Treatment.Concrete outcome see table 2 and table 3:
Table 2 is at CO2Corrosion rate in distilled water solution is over time
Table 3 corrosion rate is over time
Corrosion temperature 40℃ 60℃ 90℃
Untreated samples Corrosion Mass-loss (mg) 570/293 683/338 72/38
The present invention processes sample Corrosion Mass-loss (mg) 480/200 88/53 42/24
In process of the test by observe sample, find by pressure 1MPa containing CO2Distilled water solution corrosion after, along with time Between prolongation, perusal goes out untreated samples surface the corrosive film of significantly layering, and surface is uneven, some corruption Erosion film has come off, and the specimen surface through nitrogen treatment also has the corrosive film of little area to be formed, but with the preparation of the present invention The corrosive film on oil well pipe surface prepared by method also well combines with sample.
It can be seen that temperature difference corrosion rate is different from table 2-3, but oil well pipe prepared by the present invention (being called for short PIP process) is far smaller than the corrosion rate of the oil well pipe not processed through any method and than nitriding pipe Corrosion rate is low, illustrates that the Corrosion Protection of the oil well pipe that PIP of the present invention processed is better than nitriding pipe.
Embodiment 8:
The oil well pipe prepared without oil well pipe (material is N80) and embodiment of the present invention 1-3 of any process is carried out Saline adds the mass loss corrosion test of hydrogen peroxide, is specifically shown in table 4 below.
Table 4 mass loss corrosion test
Finding out from upper table, after the oil well pipe corrosion that the PIP of the present invention processed, mass loss is the least.
Embodiment 9:
Choose each one of the oil well pipe that embodiment 3-4 preparation method is prepared respectively, by the oil well pipe without any process The oil well pipe prepared with the embodiment of the present invention has carried out the salt spray test of standard, wherein the data in table be start to get rusty time Between, it is specifically shown in table 5 below.
Table 5 salt spray test data
As can be seen from the table, the oil well pipe corrosion resistance processed through the PIP of the present invention promotes.
Embodiment 10:
The three oil well pipe specimen codings preparing embodiment 1-3 have carried out impact test and tension test, specifically Table 6 below and 7 between experimental result data.
Table 6 impact test data summarization
Wherein: sample 1 is the product of the embodiment of the present invention 1；
Sample 2 is the product of the embodiment of the present invention 2；
Sample 3 is the product of the embodiment of the present invention 3；
Table 7 tension test data summarization
Wherein: sample 1 is the product of the embodiment of the present invention 1；
Sample 2 is the product of the embodiment of the present invention 2；
Sample 3 is the product of the embodiment of the present invention 3；
As can be seen from the above table, the oil well pipe that the present invention prepares has good mechanical property, the impact of material Value, yield strength, tensile strength and elongation percentage have all reached the setting of API standard.
The oil field having in recent years uses the oil well pipe that nitridation technique processed, although the oil well pipe after Nitrizing Treatment Corrosion stability is significantly improved, but the fragility of oil well pipe is big, and mechanical property substantially reduces.
Nitridation pipe is in terms of corrosion stability, although more untreated oil well pipe increases, but its effect is the most not ideal enough.With Time, due to nitrogen treatment reduce the mechanical property of oil well pipe, particularly material elongation percentage reduce more apparent, it is impossible to reach API standard set quota, the mechanical property of oil well pipe cannot be guaranteed, and therefore produces down-hole at the oil field nitridation pipe having and breaks Split phenomenon.
In view of the foregoing, present invention employs PIP technology (controlled ion infiltration technology), penetrate on oil well pipe surface non- Metal and metallic element, be used for increasing substantially the corrosion stability of oil well pipe, corrosion stability, and the PIP technology of the present invention can guarantee that The mechanical property of oil well pipe, will not rupture.
The present invention is suitable for the material of all manufacture oil well pipes: such as J55, K55, N80, N80-Q, P110, Q125 all size The oil well pipe of wall thickness.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, that is made any repaiies Change, equivalent, improvement etc., should be included within the scope of the present invention.

Claims (9)

1. the preparation method of an oil well pipe, it is characterised in that comprise the steps:
(A) preheating: oil well pipe enters air-heating furnace preheating, and temperature is 300-450 DEG C, time 20-40min；
(B) nitrogen carbon ruthenium ion penetrates into: preheated oil well pipe enters nitrogen carbon ruthenium ion and penetrates into stove through the infiltration of nitrogen carbon ruthenium ion penetration enhancer Processing, temperature is 550-660 DEG C, and the time is 30-120min；
(C) ion activation: the oil well pipe penetrated into by nitrogen carbon ruthenium ion enters ion activation stove at ion activation penetration enhancer infiltration Reason, temperature is 450-550 DEG C, and the time is 30-120min；
(D) oxonium ion penetrate into: through ion activation oil well pipe enter oxonium ion penetrate into stove through oxonium ion penetration enhancer infiltration process, temperature For 370-430 DEG C, the time is 15-30min；
(E) clean afterwards: remove oil well pipe surface penetration enhancer, clean up with water, dry or naturally dry；
(F) ion stabilizedization: oil well pipe enters the ion stabilizer of ion stabilizedization stove splendid attire and carries out ion stabilizedization, temperature For 120-200 DEG C, the time is 20-50min, and described ion stabilizer includes following components by weight percentage: alkane 80- 93%, cycloalkane 5-15%, polyolefin 1-5%, Matrii Sulfas Exsiccatus 0.2-1%；
(H) oil well pipe through ion stabilizedization enters the oil groove containing 10-20# machine oil, immersion oil time 3-10min；
Wherein, oil well pipe include oil well pipe matrix, the surface of described oil well pipe matrix have the most successively compound layer with And metal oxide layer, described compound layer and metal oxide layer be described oil well pipe matrix use successively nitrogen carbon ruthenium ion penetration enhancer, Ion activation penetration enhancer, oxonium ion penetration enhancer penetrate into and are formed；
Wherein said nitrogen carbon ruthenium ion penetration enhancer includes following components: Na by weight percentage2CO310%-15%, K2CO310%- 20%, NaCl 20%-25%, CO (NH2)230%-40%, K2SO31%-3%, CeCO3L%-3%, LiOH5%-10%, YCl30.03-1%；
Described ion activation penetration enhancer includes following components: Na by weight percentage2SO45%-10%, Na2CO310%-20%, K2CO310%-20%, NaCl 20%-25%, CO (NH2)230%-40%, K2SO31%-3%, CeCO3L%-3%, LiOH5%-10%, KCl3%-5%；
Described oxonium ion penetration enhancer includes following components: Na by weight percentage2CO320%-30%, NaNO220%-30%, NaNO330%-40%, CeSO410%-20%.
The preparation method of oil well pipe the most according to claim 1, it is characterised in that in described step (A), oil well pipe is carried out Pre-warmed temperature is 400-450 DEG C, and the time is 30-35min.
The preparation method of oil well pipe the most according to claim 1, it is characterised in that in described step (B), oil well pipe is through nitrogen The temperature that carbon ruthenium ion penetration enhancer infiltration processes is 600-650 DEG C, and the time is 80-100min.
The preparation method of oil well pipe the most according to claim 1, it is characterised in that in described step (C), oil well pipe through from The temperature that son activation penetration enhancer infiltration processes is 500-550 DEG C, and the time is 80-100min.
The preparation method of oil well pipe the most according to claim 1, it is characterised in that in described step (D), oil well pipe is through oxygen The temperature that ion penetration enhancer infiltration processes is 400-420 DEG C, and the time is 20-25min.
The preparation method of oil well pipe the most according to claim 1, it is characterised in that described nitrogen carbon ruthenium ion penetration enhancer is by weight Percentages includes following components: Na2CO310%-12%, K2CO310%-15%, NaCl22%-25%, CO (NH2)235%- 40%, K2SO31%-3%, CeCO3L%-3%, LiOH8%-10%, YCl30.03-0.05%.
The preparation method of oil well pipe the most according to claim 1, it is characterised in that described ion activation penetration enhancer by weight hundred Proportion by subtraction meter includes following components: Na2SO45%-8%, Na2CO310%-15%, K2CO310%-15%, NaCl20%-22%, CO(NH2)230%-35%, K2SO32%-3%, CeCO32%-3%, LiOH8%-10%, KCl4%-5%.
The preparation method of oil well pipe the most according to claim 1, it is characterised in that described oxonium ion penetration enhancer percentage by weight Following components is included: Na than meter2CO325%-28%, NaNO225%-28%, NaNO332%-38%, CeSO415%-18%.
The preparation method of oil well pipe the most according to claim 1, it is characterised in that described compound layer and described metal The thickness of oxide layer is: 40-60 μm, and hardness is 550-650Hv.
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