CN103882371A - Oil well pipe and preparation method thereof - Google Patents
Oil well pipe and preparation method thereof Download PDFInfo
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- CN103882371A CN103882371A CN201410115393.0A CN201410115393A CN103882371A CN 103882371 A CN103882371 A CN 103882371A CN 201410115393 A CN201410115393 A CN 201410115393A CN 103882371 A CN103882371 A CN 103882371A
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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
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- 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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Abstract
The invention relates to the field of petroleum and natural gas extraction, and in particular relates to an oil well pipe and a preparation method thereof. The oil well pipe comprises an oil well pipe matrix, wherein a compound layer and a metal oxidation layer are sequentially arranged on the surface of the oil well pipe matrix from inside to outside; the compound layer and the metal oxidation layer are sequentially formed by permeating a nitrogen-carbon-yttrium ion permeating agent, an ion activation permeating agent and an oxygen ion permeating agent. Compared with an oil well pipe of the prior art, the oil well pipe and the preparation method of the oil well pipe have the advantages that non-metal elements and trace metal elements are permeated into the overall oil well pipe to form anti-corrosion layers on the inner and outer walls of the oil well pipe; due to adoption of the method, the oil well pipe can bear corrosion of various corrosive mediums, is stable in quality and is free of pollution to the environment.
Description
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, use a large amount of oil well pipes, oil well pipe is embedded in down-hole for a long time, stands the corrosion of various corrosive mediums, H in oil well
2s, CO
2, O
2and the medium such as acid-alkali salt is very serious to the corrosion failure of oil well pipe, therefore, people constantly Research on Oil well casing mechanism of corrosion and take corresponding anticorrosive measure.
At present, the method that improves oil well pipe anti-corrosion capability mainly contains: 1) metal plating antisepsis, and as zinc-plated, chromium plating etc.; 2) the coated antisepsis of non-metallic material, as coating tar pitch, solvent reducible coatings, powder coating etc.; 3) infiltration method of metal and non-metallic element, as infiltrated aluminium, chromium, sulphur, nitrogen, the elements such as boron; 4) electrochemical protection; 5) prevent microbiological corrosion method.These methods all can improve transition pipeline corrosion resistance nature, but cannot stand preferably the corrosion of various corrosive mediums.
Summary of the invention
The object of the present invention is to provide a kind of oil well pipe and preparation method thereof, to solve the above problems.
A kind of oil well pipe, comprise oil well pipe matrix, the surface of described oil well pipe matrix has compound layer and metal oxide layer from the inside to the outside successively, and described compound layer and metal oxide layer are formed by described oil well pipe matrix adopts nitrogen carbon ruthenium ion penetration enhancer, ion activation penetration enhancer, oxonium ion penetration enhancer to infiltrate successively;
Wherein said nitrogen carbon ruthenium ion penetration enhancer comprises following component: Na by weight percentage
2cO
310%-15%, K
2cO
310%-20%, NaCl20%-25%, CO (NH
2)
230%-40%, K
2sO
31%-3%, CeCO
3l%-3%, LiOH5%-10%, YCl
30.03-1%;
Described ion activation penetration enhancer comprises following component: Na by weight percentage
2s0
45%-10%, Na
2cO
310%-20%, K
2cO
310%-20%, NaCl20%-25%, CO (NH
2)
230%-40%, K
2sO
31%-3%, CeCO
3l%-3%, LiOH5%-10%, KCl3%-5%;
Described oxonium ion penetration enhancer comprises following component: Na by weight percentage
2cO
320%-30%, NaNO
220%-30%, NaNO
330%-40%, CeSO
410%-20%.
In the present invention, oil well pipe matrix shows through the processing of nitrogen carbon ruthenium ion penetration enhancer, ion in nitrogen carbon ruthenium ion penetration enhancer forms the infiltration layer of expection thickness on oil well pipe surface, this infiltration layer is made up of nitrogen carbon compound and the sosoloid of nitrogen in iron of metallic element, has high anti-corrosion characteristic.
Afterwards, further activate and to the diffusion of oil well pipe matrix direction, again complete diffusion and adsorption process through active ion penetration enhancer, adjusting ratio and the increase compisite seeping layer thickness of metallic element nitrogen carbon compound, thereby improving the anti-fatigue performance of oil well pipe.
Finally, infiltrate and process by oxonium ion penetration enhancer, residuing in the infiltration layer that the nitrogen carbon ruthenium ion penetration enhancer on oil well pipe surface reacts, forms with oxonium ion penetration enhancer is that a part of oxygen dissolves in compound lattice with gap form, another part oxygen forms metal oxide layer on surface, thereby further improves the anti-corrosion resisting property of oil well pipe.
The present invention is by infiltrating non-metallic element and micro-metals in the surface of oil-feed well casing matrix, surface at oil well pipe matrix forms compound layer and metal oxide layer, not only greatly improve the solidity to corrosion of oil well pipe, and oil well pipe after treatment also has good mechanical property, and cost performance is high, environment is not polluted.
Useful active ion good stability in the present invention's penetration enhancer used, along with controlled ion infiltrates the carrying out that (PIP) processes, the decline of active ion concentration presents certain rule, by chemical analysis detection means, ionic concn is analyzed, can quantitatively regulate the concentration of active ion in penetration enhancer, infiltrate temperature and infiltration time by change simultaneously, can effectively control the ratio of thing phase in compisite seeping layer, and obtain the alloying layer thickness of expection.
Preferably, nitrogen carbon ruthenium ion penetration enhancer comprises following component: Na by weight percentage
2cO
310%-12%, K
2cO
310%-15%, NaCl22%-25%, CO (NH
2)
235%-40%, K
2sO
31%-3%, CeCO
3l%-3%, LiOH8%-10%, YCl
30.03-0.05%.
Preferably, ion activation penetration enhancer comprises following component: Na by weight percentage
2s0
45%-8%, Na
2cO
310%-15%, K
2cO
310%-15%, NaCl20%-22%, CO (NH
2)
230%-35%, K
2sO
32%-3%, CeCO
32%-3%, LiOH8%-10%, KCl4%-5%.
Preferably, oxonium ion penetration enhancer comprises following component: Na by weight percentage
2cO
325%-28%, NaNO
225%-28%, NaNO
332%-38%, CeSO
415%-18%.
Preferably, the oil well pipe that the present invention prepares has following performance advantage: the thickness of compound layer and metal oxide layer is: 40-60 μ m, hardness is 550-650Hv.
Preferably, temperature resistance ability is obvious, can be for a long time 500 ℃ of following uses.
The present invention also provides the preparation method of a kind of described oil well pipe of knowing clearly, and comprises the steps:
(A) preheating: oil well pipe is entered to air-heating furnace preheating, and temperature is 300-450 ℃, time 20-40min; Preheating is the moisture that remains in oil well pipe surface in order to dry, and makes oil well pipe process rear outward appearance more consistent, does not produce surface imperfection, and preheating simultaneously also has certain katalysis to the infiltration of element;
(B) nitrogen carbon ruthenium ion infiltrates: enter nitrogen carbon ruthenium ion through the oil well pipe of preheating and infiltrate stove through described nitrogen carbon ruthenium ion penetration enhancer infiltration processing, temperature is 550-660 ℃, and the time is 30-120min; In active ion decomposition, diffusion and adsorption process in nitrogen carbon ruthenium ion penetration enhancer, form the infiltration layer of expection thickness at oil well pipe matrix surface; This infiltration layer is made up of nitrogen carbon compound and the sosoloid of nitrogen in iron of metallic element, has high anti-corrosion characteristic;
(C) ion activation: the oil well pipe that nitrogen carbon ruthenium ion was infiltrated enters ion activation stove, infiltrates and processes through described ion activation penetration enhancer, and temperature is 450-550 ℃, and the time is 30-120min; Further activation to oil well pipe matrix direction of the active ion that is adsorbed in oil well pipe matrix surface, again complete diffusion and adsorption process, the further thickness of adjusting the ratio of nitrogen carbon compound and further increasing infiltration layer, thereby the performance of raising oil well pipe antifatigue;
(D) oxonium ion infiltrates: enter oxonium ion through the oil well pipe of ion activation and infiltrate stove through described oxonium ion penetration enhancer infiltration processing, temperature is 370-430 ℃, and the time is 15-30min; The nitrogen carbon ruthenium ion penetration enhancer that residues in oil well pipe surface is that a part of oxygen dissolves in compound lattice with gap form with the infiltration layer that the penetration enhancer in oxonium ion infiltration stove reacts, forms, and another part oxygen forms metal oxide layer on surface;
(E) after, clean: remove oil well pipe surface penetration enhancer, water cleans up oven dry or naturally dry;
(F) ion stabilizedization: the ion stabilizer that oil well pipe enters ion stabilizedization stove splendid attire carry out ion stabilizedization, temperature is 120-200 ℃, time is 20-50min, and described ion stabilizer comprises following component by weight percentage: alkane 80-93%, naphthenic hydrocarbon 5-15%, polyolefine 1-5%, Sodium sulfate anhydrous.min(99) 0.2-1%; The process of ion stabilizedization is stabilized and increased the density of infiltration layer to the compisite seeping layer of operation before.
(G) enter the oil groove of splendid attire 10-20# machine oil through the oil well pipe of ion stabilizedization, immersion oil time 3-10min, further increases its solidity to corrosion.
Method of the present invention is by infiltrating the surface of oil-feed well casing matrix by non-metallic element and micro-metals; surface at oil well pipe matrix forms compound layer and metal oxide layer; make the surface of oil well pipe matrix form anticorrosion antiwear layer; not only greatly improve the solidity to corrosion of oil well pipe; and oil well pipe after treatment also has good mechanical property; and cost performance is high; and due in the time that oxonium ion infiltrates; the harmful ions such as the cyanogen root that surface is remaining are also simultaneously oxidized; generate the non-harmful carbonate material of environment, thereby realized the object of protection of the environment.
Preferably, further comprising the steps of before in step (A): oil well pipe is carried out to front cleaning: to remove oil well pipe surface and oil contaminant and surperficial rusty stain, be then installed: pack oil well pipe into frock.
Preferably, in step (A), it is 400-450 ℃ that oil well pipe carries out pre-warmed temperature, and the time is 30-35min.
Preferably, in step (B), it is 600-650 ℃ that oil well pipe infiltrates through nitrogen carbon ruthenium ion penetration enhancer the temperature of processing, and the time is 80-100min.
Preferably, in step (C), it is 500-550 ℃ that oil well pipe infiltrates through ion activation penetration enhancer the temperature of processing, and the time is 80-100min.
Preferably, in step (D), it is 400-420 ℃ that oil well pipe infiltrates through oxonium ion penetration enhancer the temperature of processing, and the time is 20-25min.
In the present invention, in step (A), adopt the pre-heat energy of air-heating furnace to strengthen pre-heat effect, in step (B), adopt nitrogen carbon ruthenium ion infiltration stove to infiltrate to process and can better control temperature and time, strengthen and infiltrate the effect of processing, in step (C), adopt ion activation stove to infiltrate temperature and the time of processing better to control ion activation, in step (D), adopt oxonium ion to infiltrate stove and can better control temperature and the time that oxonium ion infiltration is processed, make the oil well pipe finally obtaining there is better preservative property and good 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, non-metallic element and micro-metals are penetrated into the corrosion-resistant coating of outer wall formation therein in oil well pipe entirety, this method can withstand the corrosion of various corrosive mediums, steady quality and can 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 numeral: 1 compound layer, 2 metal oxide layers.
Embodiment
Also by reference to the accompanying drawings the present invention is described in further detail below by specific embodiment.
Embodiment 1:
The preparation method of oil well pipe:
(A) oil well pipe that is N80 by material is to preheat 20min at the temperature of 300 ℃ in temperature;
(B) oil well pipe after above-mentioned heating is infiltrated and processed through nitrogen carbon ruthenium ion penetration enhancer, service temperature is 550 ℃, and the time is 30min; Wherein nitrogen carbon ruthenium ion penetration enhancer comprises following component: Na by weight percentage
2cO
310%, K
2cO
320%, NaCl23%, CO (NH
2)
240%, K
2sO
31%, CeCO
3l%, LiOH4%, YCl
31%;
(C) oil well pipe of above-mentioned steps being processed infiltrates and processes through ion activation penetration enhancer, and service temperature is 450 ℃, and the time is 30min; Ion activation penetration enhancer comprises following component: Na by weight percentage
2s0
410%, Na
2cO
310%, K
2cO
310%, NaCl20%, CO (NH
2)
240%, K
2sO
31%, CeCO
3l%, LiOH5%, KCl3%;
(D) again by oil well pipe through oxonium ion penetration enhancer infiltrate process and surface at oil well pipe on by thering is successively compound layer 1 and metal oxide layer 2 outside interior, service temperature is 370 ℃, the time is 15min; Oxonium ion penetration enhancer comprises following component: Na by weight percentage
2cO
320%, NaNO
220%, NaNO
340%, CeSO
420%;
(E) remove oil well pipe surface penetration enhancer, water cleans up, and dries;
(F) by oil well pipe through ion stabilizedization processing, service temperature is 120 ℃, the time is 30min; Ion stabilizer comprises following component by weight percentage: alkane 80%, naphthenic hydrocarbon 15%, polyolefine 4%, Sodium sulfate anhydrous.min(99) 1%;
(G) enter the oil groove of splendid attire 10# machine oil through the oil well pipe of ion stabilizedization, immersion oil time 3min;
As Figure 1-3, the thickness of compound layer and described metal oxide layer is 35 μ m to the oil well pipe of preparing through aforesaid method, and hardness is 500Hv, can be for a long time 500 ℃ of following uses, and it is 60mm that weld seam is processed width.
Embodiment 2:
The preparation method of oil well pipe:
(A) oil well pipe that is N80 to material carries out front cleaning: remove oil well pipe surface and oil contaminant and surperficial rusty stain and be installed: packing oil well pipe into frock;
(B) be to preheat 40min at the temperature of 450 ℃ in temperature by oil well pipe;
(C) oil well pipe after above-mentioned heating is infiltrated and processed through nitrogen carbon ruthenium ion penetration enhancer, service temperature is 660 ℃, and the time is 120min; Wherein nitrogen carbon ruthenium ion penetration enhancer comprises following component: Na by weight percentage
2cO
315%, K
2cO
319%, NaCl20%, CO (NH
2)
230%, K
2sO
33%, CeCO
33%, LiOH9.97%, YCl
30.03%;
(D) oil well pipe of above-mentioned steps being processed infiltrates and processes through ion activation penetration enhancer, and service temperature is 550 ℃, and the time is 120min; Ion activation penetration enhancer comprises following component: Na by weight percentage
2s0
45%, Na
2cO
312%, K
2cO
312%, NaCl25%, CO (NH
2)
230%, K
2sO
33%, CeCO
33%, LiOH10%, KCl5%;
(E) again by oil well pipe through oxonium ion penetration enhancer infiltrate process and surface at oil well pipe on by thering is successively compound layer 1 and metal oxide layer 2 outside interior, service temperature is 430 ℃, the time is 30min; Oxonium ion penetration enhancer comprises following component: Na by weight percentage
2cO
330%, NaNO
230%, NaNO
330%, CeSO
410%;
(F) remove oil well pipe surface penetration enhancer, water cleans up, naturally dry;
(G) by oil well pipe through ion stabilizedization processing, service temperature is 200 ℃, the time is 50min; Ion stabilizer comprises following component by weight percentage: alkane 93%, naphthenic hydrocarbon 5%, polyolefine 1.8%, Sodium sulfate anhydrous.min(99) 0.2%;
(H) enter the oil groove of splendid attire 20# machine oil through the oil well pipe of ion stabilizedization, immersion oil time 9min;
As Figure 1-3, the thickness of compound layer and described metal oxide layer is 60 μ m to the oil well pipe of preparing through aforesaid method, and hardness is 650Hv, can be for a long time 500 ℃ of following uses.
Embodiment 3:
The preparation method of oil well pipe:
(A) oil well pipe that is N80 to material carries out front cleaning: remove oil well pipe surface and oil contaminant and surperficial rusty stain and be installed: packing oil well pipe into frock;
(B) be to preheat 30min at the temperature of 400 ℃ in temperature by oil well pipe;
(C) oil well pipe after above-mentioned heating is infiltrated and processed through nitrogen carbon ruthenium ion penetration enhancer, service temperature is 650 ℃, and the time is 80min; Wherein nitrogen carbon ruthenium ion penetration enhancer comprises following component: Na by weight percentage
2cO
312%, K
2cO
315%, NaCl23%, CO (NH
2)
235%, K
2sO
33%, CeCO
33%, LiOH8.5%, YCl
30.05%;
(D) oil well pipe of above-mentioned steps being processed infiltrates and processes through ion activation penetration enhancer, and service temperature is 500 ℃, and the time is 100min; Ion activation penetration enhancer comprises following component: Na by weight percentage
2s0
46%, Na
2cO
310%, K
2cO
311%, NaCl22%, CO (NH
2)
235%, K
2sO
32%, CeCO
32%, LiOH8%, KCl4%;
(E) again by oil well pipe through oxonium ion penetration enhancer infiltrate process and surface at oil well pipe on by thering is successively compound layer 1 and metal oxide layer 2 outside interior, service temperature is 400 ℃, the time is 20min; Oxonium ion penetration enhancer comprises following component: Na by weight percentage
2cO
325%, NaNO
225%, NaNO
332%, CeSO
418%;
(F) remove oil well pipe surface penetration enhancer, water cleans up, naturally dry;
(G) by oil well pipe through ion stabilizedization processing, service temperature is 150 ℃, the time is 40min; Ion stabilizer comprises following component by weight percentage: alkane 93%, naphthenic hydrocarbon 5%, polyolefine 1%, Sodium sulfate anhydrous.min(99) 1%;
(H) enter the oil groove of splendid attire 20# machine oil through the oil well pipe of ion stabilizedization, immersion oil time 10min;
The oil well pipe of preparing through aforesaid method, the thickness of compound layer and described metal oxide layer is 50 μ m, hardness is 600Hv, can be for a long time 500 ℃ of following uses.
Embodiment 4:
The preparation method of oil well pipe:
(A) oil well pipe that is N80Q to material carries out front cleaning: remove oil well pipe surface and oil contaminant and surperficial rusty stain and be installed: packing oil well pipe into frock;
(B) be to preheat 32min at the temperature of 420 ℃ in temperature by oil well pipe;
(C) oil well pipe after above-mentioned heating is infiltrated and processed through nitrogen carbon ruthenium ion penetration enhancer, service temperature is 600 ℃, and the time is 100min; Wherein nitrogen carbon ruthenium ion penetration enhancer comprises following component: Na by weight percentage
2cO
315%, K
2cO
310%, NaCl21%, CO (NH
2)
239%, K
2sO
33%, CeCO
33%, LiOH8%, YCl
31%;
(D) oil well pipe of above-mentioned steps being processed infiltrates and processes through ion activation penetration enhancer, and service temperature is 520 ℃, and the time is 80min; Ion activation penetration enhancer comprises following component: Na by weight percentage
2s0
45%, Na
2cO
320%, K
2cO
315%, NaCl20%, CO (NH
2)
230%, K
2sO
31%, CeCO
31%, LiOH5%, KCl3%;
(E) again by oil well pipe through oxonium ion penetration enhancer infiltrate process and surface at oil well pipe on by thering is successively compound layer 1 and metal oxide layer 2 outside interior, service temperature is 420 ℃, the time is 25min; Oxonium ion penetration enhancer comprises following component: Na by weight percentage
2cO
328%, NaNO
225%, NaNO
332%, CeSO
415%;
(F) remove oil well pipe surface penetration enhancer, water cleans up, naturally dry;
(G) by oil well pipe through ion stabilizedization processing, service temperature is 180 ℃, the time is 40min; Ion stabilizer comprises following component by weight percentage: alkane 89%, naphthenic hydrocarbon 5%, polyolefine 5%, Sodium sulfate anhydrous.min(99) 1%;
(H) enter the oil groove of splendid attire 20# machine oil through the oil well pipe of ion stabilizedization, immersion oil time 8min;
The oil well pipe of preparing through aforesaid method, the thickness of compound layer and described metal oxide layer is 40 μ m, hardness is 580Hv, can be for a long time 500 ℃ of following uses.
Embodiment 5
The preparation method of oil well pipe:
(A) oil well pipe that is N80Q to material carries out front cleaning: remove oil well pipe surface and oil contaminant and surperficial rusty stain and be installed: packing oil well pipe into frock;
(B) be to preheat 32min at the temperature of 420 ℃ in temperature by oil well pipe;
(C) oil well pipe after above-mentioned heating is infiltrated and processed through nitrogen carbon ruthenium ion penetration enhancer, service temperature is 600 ℃, and the time is 100min; Wherein nitrogen carbon ruthenium ion penetration enhancer comprises following component: Na by weight percentage
2cO
312%, K
2cO
310%, NaCl25%, CO (NH
2)
238%, K
2sO
33%, CeCO
33%, LiOH8%, YCl
31%;
(D) oil well pipe of above-mentioned steps being processed infiltrates and processes through ion activation penetration enhancer, and service temperature is 520 ℃, and the time is 80min; Ion activation penetration enhancer comprises following component: Na by weight percentage
2s0
45%, Na
2cO
315%, K
2cO
320%, NaCl20%, CO (NH
2)
230%, K
2sO
31%, CeCO
31%, LiOH5%, KCl3%;
(E) again by oil well pipe through oxonium ion penetration enhancer infiltrate process and surface at oil well pipe on by thering is successively compound layer 1 and metal oxide layer 2 outside interior, service temperature is 420 ℃, the time is 25min; Oxonium ion penetration enhancer comprises following component: Na by weight percentage
2cO
328%, NaNO
220%, NaNO
338%, CeSO
414%;
(F) remove oil well pipe surface penetration enhancer, water cleans up, naturally dry;
(G) by oil well pipe through ion stabilizedization processing, service temperature is 120 ℃, the time is 50min; Ion stabilizer comprises following component by weight percentage: alkane 89%, naphthenic hydrocarbon 5%, polyolefine 5%, Sodium sulfate anhydrous.min(99) 1%;
(H) enter the oil groove of splendid attire 20# machine oil through the oil well pipe of ion stabilizedization, immersion oil time 8min;
The oil well pipe of preparing through aforesaid method, the thickness of compound layer and described metal oxide layer is 40 μ m, hardness is 580Hv,, can be for a long time 500 ℃ of following uses.
Embodiment 6:
Take respectively the oil well pipe that the preparation method of embodiments of the invention 1-3 prepares and carry out hydrogen sulfide corrosion resistant test.
Examination criteria adopts " sour oil gas field drilling well drilling rod standard ", and by the A method test (A solution) of NACETM0177 standard, loading force is 441.6N/mm
2(80%Rt0.5), specifically at 24 ± 3 ℃ of test temperatures through 720 hours, concrete test-results sees the following form 1.
Table 1 test result
| Specimen coding | Proof stress (N/mm 2） | The protracted test time (h) | F(cracking)/NF(do not ftracture) |
| 1 | 441.6 | 720 | |
| 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 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 do not ftracture, and illustrate that oil well pipe performance prepared by method of the present invention can reach application request, meet the indices of API regulation.
Embodiment 7:
In the oil well pipe that the method for the embodiment of the present invention 2 is prepared and prior art, in time and temperature, carry out CO through oil well pipe and the untreated oil well pipe (material is N80) of nitriding processing
2anticorrosive contrast, wherein the treatment process of the oil well pipe of nitriding processing is: the transition pipeline that is N80 by material adopts the nitriding treatment process of the embodiment 1 in CN102560507A specification sheets embodiment to carry out nitriding processing.Concrete outcome sees the following form 2 and table 3:
Table 2 is at CO
2erosion rate in distilled water solution over time
Table 3 erosion rate over time
| Corrosion temperature | 40℃ | 60℃ | 90℃ |
0109?
| 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 observing sample, find by the CO that contains of pressure 1MPa
2after distilled water solution corrosion, along with the prolongation of time, visual inspection goes out untreated samples surface the corrosive film of obvious layering, and surface is uneven, some corrosive films come off, also have the corrosive film of small area to form through the specimen surface of nitriding treatment, but the corrosive film on the oil well pipe surface of preparing by preparation method of the present invention also well combine with sample.
From table 2-3, can find out, the different erosion rates of temperature are different, but oil well pipe prepared by the present invention (be called for short PIP process) is far smaller than the erosion rate of the oil well pipe of not processing through any method and lower than the erosion rate of nitriding pipe, illustrate that the Corrosion Protection of the oil well pipe that PIP of the present invention processed is better than nitriding pipe.
Embodiment 8:
Oil well pipe that oil well pipe without any processing (material is N80) and embodiment of the present invention 1-3 are prepared has carried out the mass loss corrosion test that salt solution adds hydrogen peroxide, specifically sees the following form 4.
Table 4 mass loss corrosion test
From upper table, find out, after the oil well pipe corrosion of processing through PIP of the present invention, mass loss is very little.
Embodiment 9:
Choose respectively each one of the oil well pipe that embodiment 3-4 preparation method prepares, the oil well pipe that oil well pipe without any processing and the embodiment of the present invention are prepared has carried out the salt-fog test of standard, wherein the data in table are the time that starts to get rusty, and specifically see the following form 5.
Table 5 salt-fog test data
As can be seen from the table, the oil well pipe corrosion resistance of processing through PIP of the present invention promotes.
Embodiment 10:
Three oil well pipe specimen codings that embodiment 1-3 is prepared have carried out shock test and tension test, following table 6 and 7 between specific experiment result data.
Table 6 shock test data gather
Wherein: sample 1 is the product of the embodiment of the present invention 1;
Sample 3 is the product of the embodiment of the present invention 3;
Table 7 tension test data gather
Wherein: sample 1 is the product of the embodiment of the present invention 1;
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 value of material, and yield strength, tensile strength and unit elongation have all reached the prescribed value of API standard.
The Oilfield using having in recent years be the oil well pipe that nitridation technique was processed, although the corrosion stability of nitriding oil well pipe after treatment is significantly improved, the fragility of oil well pipe is large, mechanical property obviously reduces.
Nitrogenize pipe is aspect corrosion stability, although more untreated oil well pipe increases, its effect is still not ideal enough.Simultaneously, due to nitriding treatment reduced oil well pipe mechanical property, particularly material unit elongation reduce more obvious, cannot reach API standard set quota, the mechanical property of oil well pipe cannot be guaranteed, and therefore produces down-hole phenomenon of rupture at the oil field nitrogenize pipe having.
In view of the foregoing, the present invention has adopted PIP technology (controlled ion infiltration technology), infiltrates nonmetal and metallic element on oil well pipe surface, be used for increasing substantially the corrosion stability of oil well pipe, corrosion stability, and PIP technology of the present invention can guarantee the mechanical property of oil well pipe, can not rupture.
The present invention is suitable for the material of all manufacture oil well pipes: as the oil well pipe of J55, K55, N80, N80-Q, P110, Q125 all size wall thickness.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. an oil well pipe, it is characterized in that, comprise oil well pipe matrix, the surface of described oil well pipe matrix has compound layer and metal oxide layer from the inside to the outside successively, and described compound layer and metal oxide layer are formed by described oil well pipe matrix adopts nitrogen carbon ruthenium ion penetration enhancer, ion activation penetration enhancer, oxonium ion penetration enhancer to infiltrate successively;
Wherein said nitrogen carbon ruthenium ion penetration enhancer comprises following component: Na by weight percentage
2cO
310%-15%, K
2cO
310%-20%, NaCl20%-25%, CO (NH
2)
230%-40%, K
2sO
31%-3%, CeCO
3l%-3%, LiOH5%-10%, YCl
30.03-1%;
Described ion activation penetration enhancer comprises following component: Na by weight percentage
2s0
45%-10%, Na
2cO
310%-20%, K
2cO
310%-20%, NaCl20%-25%, CO (NH
2)
230%-40%, K
2sO
31%-3%, CeCO
3l%-3%, LiOH5%-10%, KCl3%-5%;
Described oxonium ion penetration enhancer comprises following component: Na by weight percentage
2cO
320%-30%, NaNO
220%-30%, NaNO
330%-40%, CeSO
410%-20%.
2. oil well pipe according to claim 1, is characterized in that, described nitrogen carbon ruthenium ion penetration enhancer comprises following component: Na by weight percentage
2cO
310%-12%, K
2cO
310%-15%, NaCl22%-25%, CO (NH
2)
235%-40%, K
2sO
31%-3%, CeCO
3l%-3%, LiOH8%-10%, YCl
30.03-0.05%.
3. oil well pipe according to claim 1, is characterized in that, described ion activation penetration enhancer comprises following component: Na by weight percentage
2s0
45%-8%, Na
2cO
310%-15%, K
2cO
310%-15%, NaCl20%-22%, CO (NH
2)
230%-35%, K
2sO
32%-3%, CeCO
32%-3%, LiOH8%-10%, KCl4%-5%.
4. oil well pipe according to claim 1, is characterized in that, described oxonium ion penetration enhancer comprises following component: Na by weight percentage
2cO
325%-28%, NaNO
225%-28%, NaNO
332%-38%, CeSO
415%-18%.
5. according to the oil well pipe described in claim 1-4 any one, it is characterized in that, the thickness of described compound layer and described metal oxide layer is: 40-60 μ m, hardness is 550-650Hv.
6. the preparation method of the oil well pipe as described in claim 1-5 any one, is characterized in that, comprises the steps:
(A) preheating: oil well pipe is entered to air-heating furnace preheating, and temperature is 300-450 ℃, time 20-40min;
(B) nitrogen carbon ruthenium ion infiltrates: enter nitrogen carbon ruthenium ion through the oil well pipe of preheating and infiltrate stove through described nitrogen carbon ruthenium ion penetration enhancer infiltration processing, temperature is 550-660 ℃, and the time is 30-120min;
(C) ion activation: the oil well pipe that nitrogen carbon ruthenium ion was infiltrated enters ion activation stove and infiltrates and process through described ion activation penetration enhancer, and temperature is 450-550 ℃, and the time is 30-120min;
(D) oxonium ion infiltrates: enter oxonium ion through the oil well pipe of ion activation and infiltrate stove through described oxonium ion penetration enhancer infiltration processing, temperature is 370-430 ℃, and the time is 15-30min;
(E) after, clean: remove oil well pipe surface penetration enhancer, water cleans up oven dry or naturally dry;
(F) ion stabilizedization: the ion stabilizer that oil well pipe enters ion stabilizedization stove splendid attire carry out ion stabilizedization, temperature is 120-200 ℃, time is 20-50min, and described ion stabilizer comprises following component by weight percentage: alkane 80-93%, naphthenic hydrocarbon 5-15%, polyolefine 1-5%, Sodium sulfate anhydrous.min(99) 0.2-1%;
(G) enter the oil groove of splendid attire 10-20# machine oil through the oil well pipe of ion stabilizedization, immersion oil time 3-10min.
7. the preparation method of oil well pipe according to claim 6, is characterized in that, in described step (A), it is 400-450 ℃ that oil well pipe carries out pre-warmed temperature, and the time is 30-35min.
8. the preparation method of oil well pipe according to claim 6, is characterized in that, in described step (B), it is 600-650 ℃ that oil well pipe infiltrates through nitrogen carbon ruthenium ion penetration enhancer the temperature of processing, and the time is 80-100min.
9. the preparation method of oil well pipe according to claim 6, is characterized in that, in described step (C), it is 500-550 ℃ that oil well pipe infiltrates through ion activation penetration enhancer the temperature of processing, and the time is 80-100min.
10. the preparation method of oil well pipe according to claim 6, is characterized in that, in described step (D), it is 400-420 ℃ that oil well pipe infiltrates through oxonium ion penetration enhancer the temperature of processing, and the time is 20-25min.
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| CN201410115393.0A CN103882371B (en) | 2013-08-08 | 2014-03-25 | A kind of oil well pipe and preparation method thereof |
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| CN201310341600.X | 2013-08-08 | ||
| CN201310341600XA CN103362454A (en) | 2013-08-08 | 2013-08-08 | Method for preventing oil well pipe coupling from thread gluing and improving corrosion resistance of oil well pipe coupling |
| CN201310341600X | 2013-08-08 | ||
| CN201410115393.0A CN103882371B (en) | 2013-08-08 | 2014-03-25 | A kind of oil well pipe and preparation method thereof |
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| CN201410113851.7A Active CN103836273B (en) | 2013-08-08 | 2014-03-25 | A kind of transport pipe and preparation method thereof |
| CN201410114185.9A Expired - Fee Related CN103834915B (en) | 2013-08-08 | 2014-03-25 | A kind of corrosion proof method of raising oil pipe |
| CN201410113876.7A Active CN103867134B (en) | 2013-08-08 | 2014-03-25 | A kind of sucker rod and preparation method thereof |
| CN201410115393.0A Active CN103882371B (en) | 2013-08-08 | 2014-03-25 | A kind of oil well pipe and preparation method thereof |
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| CN201410113851.7A Active CN103836273B (en) | 2013-08-08 | 2014-03-25 | A kind of transport pipe and preparation method thereof |
| CN201410114185.9A Expired - Fee Related CN103834915B (en) | 2013-08-08 | 2014-03-25 | A kind of corrosion proof method of raising oil pipe |
| CN201410113876.7A Active CN103867134B (en) | 2013-08-08 | 2014-03-25 | A kind of sucker rod and preparation method thereof |
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| CN103362454A (en) * | 2013-08-08 | 2013-10-23 | 成都伍田机械技术有限责任公司 | Method for preventing oil well pipe coupling from thread gluing and improving corrosion resistance of oil well pipe coupling |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN103834915B (en) | 2016-02-10 |
| CN103867134B (en) | 2015-08-19 |
| CN103834915A (en) | 2014-06-04 |
| CN103362454A (en) | 2013-10-23 |
| CN103836273B (en) | 2015-10-21 |
| CN103836273A (en) | 2014-06-04 |
| CN103867134A (en) | 2014-06-18 |
| CN103882371B (en) | 2016-08-17 |
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Address after: 610000 Sichuan, Longquanyi economic and Technological Development Zone, No. 18 middle star road, building No. 1, building 5, building Applicant after: SICHUAN ZHONGWU ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD. Address before: 610000 Sichuan, Longquanyi economic and Technological Development Zone, No. 18 middle star road, building No. 1, building 5, building Applicant before: Sichuan Zhongwu Taiwo New Material Co., Ltd. |
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