CN103834915A - Method of improving corrosion resistance of oil tube - Google Patents

Method of improving corrosion resistance of oil tube Download PDF

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Publication number
CN103834915A
CN103834915A CN201410114185.9A CN201410114185A CN103834915A CN 103834915 A CN103834915 A CN 103834915A CN 201410114185 A CN201410114185 A CN 201410114185A CN 103834915 A CN103834915 A CN 103834915A
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China
Prior art keywords
ion
oil
time
oil pipe
temperature
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CN201410114185.9A
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CN103834915B (en
Inventor
罗德福
漆世荣
李信
鲁伟员
王强
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CHENGDU WOTEAM MACHINERY TECHNOLOGY CO LTD
Sichuan Zhongwu Environmental Protection Technology Co ltd
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CHENGDU WOTEAM MACHINERY TECHNOLOGY Co Ltd
Sichuan Zhongwu Taiwo New Material 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

Abstract

The invention provides a method of improving corrosion resistance of an oil tube. The method comprises the following steps: (1) pre-cleaning; (2) card mounting; (3) pre-heating; (4) nitrogen-carbon-yttrium ion penetrating; (5) ion activating; (6) oxygen ion penetrating; (7) post-cleaning; (8) ion stabilizing, and (9) oil immersing. The method disclosed by the invention can carry out controllable ion penetrating (PIP) treatment on the oil tube to form multiple compound penetrating layers on the surface of the oil tube, so that good mechanical performance is achieved and service life of the oil tube is prolonged while the corrosion resistance is improved, and therefore, the method has good practical application effect.

Description

A kind of corrosion proof method of oil pipe that improves
Technical field
The present invention relates to oil field, improve the corrosion proof method of oil pipe in particular to one.
Background technology
Oil pipe is embedded in down-hole for a long time, stands the corrosion of various corrosive mediums, and due to the geological condition difference of various places, the situation of tube corrosion is also not quite similar.Conventionally the more anti-corrosion method of application has: 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.In above-mentioned anti-corrosion method, to adopt the coated method of non-metallic material, to apply morely, effect is better.
Infiltrate metal and non-metallic element to metallic surface, be used for improving corrosion stability, in the industries such as mechanical chemical industry large-scale application already, as commonplace in technology application such as aluminising, chromising, nitriding and oxidations, but seldom aspect oil pipe anti-corrosive, adopt this technology.The oil field having in recent years starts to adopt nitridation technique to process oil pipe, and the corrosion stability that rear oil pipe is processed in nitriding is significantly improved, but the fragility of oil pipe is large, and mechanical property obviously reduces, so that does not reach API standard set quota.
Summary of the invention
The object of the present invention is to provide a kind of corrosion proof method of oil pipe that improves, to address the above problem.
The corrosion proof method of raising oil pipe provided by the invention, comprises the following steps:
1) front cleaning: greasy dirt and the rusty stain of removing oil pipe surfaces externally and internally;
2) be installed: pack oil pipe into frock;
3) preheating: oil pipe is placed in to air-heating furnace preheating, and temperature is 300～450 ℃, and the time is 20～40min;
4) nitrogen carbon ruthenium ion infiltrates: enter nitrogen carbon ruthenium ion through the oil pipe of preheating and infiltrate stove, temperature is 550～660 ℃, and the time is 30～120min; Nitrogen carbon ruthenium ion penetration enhancer consists of by weight percentage: Na 2cO 310%～15%, K 2cO 310%～20%, NaCl20%～25%, CO (NH 2) 230%～40%, K 2sO 31%～3%, CeCO 31%～3%, LiOH5%～10%, YCl 30.03%～1%;
5) ion activation: the oil pipe infiltrating through nitrogen carbon ruthenium ion enters ion activation stove, and temperature is 450～550 ℃, and the time is 30～120min; Ion activation penetration enhancer consists of by weight percentage: Na 2sO 45%～10%, Na 2cO 310%～20%, K 2cO 310%～20%, NaCl20%～25%, CO (NH 2) 230%～40%, K 2sO 31%～3%, CeCO 31%～3%, LiOH5%～10%, KCl3%～5%;
6) oxonium ion infiltrates: enter oxonium ion through the oil pipe of ion activation and infiltrate stove, temperature is 370～430 ℃, and the time is 15～30min; Oxonium ion penetration enhancer consists of by weight percentage: Na 2cO 320%～30%, NaNO 330%～40%, NaNO 220%～30%, CeCO 310%～20%;
7) after, clean: remove the inside and outside surperficial penetration enhancer of oil pipe, water cleans up, dry or naturally dry;
8) ion stabilizedization: oil pipe enters ion stabilizedization stove, temperature is 120～200 ℃, the time is 20～50min; Ion stabilizer consists of by weight percentage: alkane 80%～93%, naphthenic hydrocarbon 5%～15%, polyolefine 1%～5%, Sodium sulfate anhydrous.min(99) 0.2%～1%;
9) immersion oil: the oil pipe after ion stabilizedization immerses the oil groove of splendid attire 10～20# machine oil, and the time is 3～10min.
The object of front cleaning is to remove the greasy dirt of pipe inner surface and the rusty stain of outside surface, prevents that effect is oozed in the resistance of greasy dirt and rusty stain in controlled ion infiltration process, guarantees that oil pipe handles rear surface uniformity simultaneously.
The moisture bringing out from rinse bath in order to dry oil pipe surface, need to carry out nitrogen carbon ruthenium ion infiltrate process before oil pipe is carried out to thermal pretreatment, more uniformity of outward appearance after oil pipe is processed, does not produce surface imperfection, and oil pipe has certain katalysis through preheating to the infiltration of element simultaneously.
In the present invention, adopt described nitrogen carbon ruthenium ion penetration enhancer to infiltrate processing, in the process of decomposing, spreading and adsorbing at active ion, form the infiltration layer of expection thickness on oil pipe surface, this infiltration layer is made up of nitrogen carbon compound and the sosoloid of nitrogen in iron of metallic element, has very high anti-corrosion characteristic.
In the present invention, oil pipe is carrying out after the infiltration of nitrogen carbon ruthenium ion, also need to carry out activation treatment, object is to make the active ion that is adsorbed in oil pipe surface further activate and spread to oil pipe matrix direction, again complete diffusion and adsorption process, adjust the ratio of metallic element nitrogen carbon compound and increase compisite seeping layer thickness, thereby improving the anti-fatigue performance of oil pipe.
After activation treatment, for the nitrogen carbon ruthenium ion penetration enhancer that residues in oil pipe surface is reacted with the penetration enhancer that oxonium ion infiltrates in stove, need to carry out oxonium ion to oil pipe and infiltrate processing, object is to form anticorrosion antiwear infiltration layer, the infiltration layer forming is that a part of oxygen dissolves in compound lattice with gap form, another part oxygen forms metal oxide layer on surface, thereby improves the corrosion resisting property of oil pipe, has good mechanical property simultaneously.
After above-mentioned a series of processing, can remain penetration enhancer at the surfaces externally and internally of oil pipe, therefore need oil pipe to carry out rear cleaning to remove the penetration enhancer on the inside and outside surface of oil well pipe.
Next need oil pipe to carry out ion stabilizedization processing, object is by the stabilization of penetration enhancer in ion stabilizedization stove, and the compisite seeping layer that operation forms is is before stabilized and increased to density, further improves the solidity to corrosion of oil pipe.
Be finally immersion oil, object is also further to improve the solidity to corrosion of oil pipe.
The corrosion proof method of raising oil pipe provided by the present invention can penetrate into product by non-metallic element and micro-metals, form anticorrosion antiwear infiltration layer at product surface, outermost layer is the zone of oxidation that the oxide compound of metallic element and the compound lattice that dissolves in oxygen form, the compound layer that inferior skin is metallic element.The thickness of the anticorrosion antiwear infiltration layer forming is that 40～60 μ m, hardness are 550～650Hv.Test is found, the oil pipe that uses method provided by the present invention to process, and its etch resistant properties significantly improves, and has good mechanical property simultaneously, can reach API standard set quota, thereby guarantees oil pipe safe handling.In addition, this anticorrosion antiwear infiltration layer heat-resisting property is good, can be for a long time 500 ℃ of following uses.Further; when the present invention processes oil pipe, when oxonium ion infiltrates oil pipe surface, the harmful ions such as the cyanogen root that oil pipe surface in the time of operation processing is before remaining are also simultaneously oxidized; generate environment amenable carbonate material, thereby realized the object of protection of the environment.
Preferably, along with the carrying out of controlled ion processing, according to the decline rule of active ion concentration, 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, described oil pipe comprises collar piping, protective casing, sand string, port sleeve pipe, sucker rod, transition pipeline, oil well pipe, sucker-rod coupling and oil well pipe box cupling.
Preferably, in described step 3), preheating temperature is 370～390 ℃, and the time is 22～28min.
Preferably, in described step 4), nitrogen carbon ruthenium ion infiltration furnace temperature is 600～620 ℃, and the time is 100～110min; Described nitrogen carbon ruthenium ion penetration enhancer consists of by weight percentage: Na 2cO 311%～13%, K 2cO 314%～18%, NaCl22%～23%, CO (NH 2) 234%～38%, K 2sO 32%～3%, CeCO 31.5%～2%, LiOH6%～7%, YCl 30.03%～1%.
Preferably, described step 5) intermediate ion activation furnace temperature is 480～520 ℃, and the time is 50～100min; Described ion activation penetration enhancer consists of by weight percentage: Na 2sO 45%～7%, Na 2cO 312%～16%, K 2cO 315%～20%, NaCl20%～22%, CO (NH 2) 231%～36%, K 2sO 31%～2%, CeCO 31%～1.5%, LiOH6%～8%, KCl3%～4%.
Preferably, in described step 6), oxonium ion infiltration furnace temperature is 360～380 ℃, and the time is 32～36min; Described oxonium ion penetration enhancer consists of by weight percentage: Na 2cO 324%～28%, NaNO 334%～38%, NaNO 225%～30%, CeCO 312%～16%.
Preferably, the temperature of described step 8) intermediate ion stabilization stove is 140～150 ℃, and the time is 25～35min; Ion stabilizer consists of by weight percentage: alkane 85%～92%, naphthenic hydrocarbon 6%～12%, polyolefine 1%～4%, Sodium sulfate anhydrous.min(99) 0.4%～0.9%.
Preferably, in described step 9), the time in the oil groove of oil pipe immersion splendid attire 10～20# machine oil is 4～6min.
The present invention also provides the thread gluing of a kind of solution oil well pipe box cupling and has improved its corrosion proof method, and described box cupling adopts the described corrosion proof method of raising oil pipe to infiltrate processing.
Described solution oil well pipe box cupling thread gluing and its corrosion proof method of raising, comprise the following steps:
1) front cleaning: remove oil well pipe coupling inner thread surface and oil contaminant and outside surface rusty stain;
2) be installed: pack oil well pipe box cupling into frock;
3) preheating: oil well pipe box cupling is placed in to air-heating furnace preheating, and temperature is 300～450 ℃, and the time is 20～40min;
4) nitrogen carbon ruthenium ion infiltrates: enter nitrogen carbon ruthenium ion through the oil well pipe box cupling of preheating and infiltrate stove, temperature is 550～660 ℃, and the time is 30～120min; Nitrogen carbon ruthenium ion penetration enhancer consists of by weight percentage: Na 2cO 310%～15%, K 2cO 310%～20%, NaCl20%～25%, CO (NH 2) 230%～40%, K 2sO 31%～3%, CeCO 31%～3%, LiOH5%～10%, YCl 30.03%～1%;
5) ion activation: the oil well pipe box cupling infiltrating through nitrogen carbon ruthenium ion enters ion activation stove, and temperature is 450～550 ℃, and the time is 30～120min; Ion activation penetration enhancer consists of by weight percentage: Na 2sO 45%～10%, Na 2cO 310%～20%, K 2cO 310%～20%, NaCl20%～25%, CO (NH 2) 230%～40%, K 2sO 31%～3%, CeCO 31%～3%, LiOH5%～10%, KCl3%～5%;
6) oxonium ion infiltrates: enter oxonium ion through the oil well pipe box cupling of ion activation and infiltrate stove, temperature is 370～430 ℃, and the time is 15～30min; Oxonium ion penetration enhancer consists of by weight percentage: Na 2cO 320%～30%, NaNO 330%～40%, NaNO 220%～30%, CeCO 310%～20%;
7) after, clean: remove the inside and outside surperficial penetration enhancer of oil well pipe box cupling, water cleans up, dry or naturally dry;
8) ion stabilizedization: oil well pipe box cupling enters ion stabilizedization stove, temperature is 120～200 ℃, the time is 20～50min; Ion stabilizer consists of by weight percentage: alkane 80%～93%, naphthenic hydrocarbon 5%～15%, polyolefine 1%～5%, Sodium sulfate anhydrous.min(99) 0.2%～1%;
9) immersion oil: the oil well pipe box cupling after ion stabilizedization immerses the oil groove of splendid attire 10～20# machine oil, and the time is 3～10min.
Preferably, described step 8) intermediate ion stablizer consists of by weight percentage: alkane 85%～92%, naphthenic hydrocarbon 6%～12%, polyolefine 1%～4%, Sodium sulfate anhydrous.min(99) 0.4%～0.9%.
The oil well pipe that uses method provided by the present invention to process, its etch resistant properties significantly improves, and has good mechanical property simultaneously, can reach API standard set quota, thereby guarantees oil well pipe safe handling.Meanwhile, adopt method provided by the present invention box cupling after treatment, its anti-stick button and solidity to corrosion are all greatly improved.
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 expecting, thereby realize preferably the quality control that PIP is processed.Oil pipe of the present invention comprises collar piping, protective casing, sand string, port sleeve pipe, sucker rod, transition pipeline and oil well pipe.
The anticorrosion antiwear infiltration layer that adopts the present invention controlled ion infiltration method to form, the oxide compound that outermost layer is metallic element and dissolve in the zone of oxidation that the compound lattice of oxygen forms, the compound layer that inferior skin is metallic element.
The inventive method is processed by oil pipe being carried out to controlled ion infiltration (PIP), forms MULTILAYER COMPOSITE infiltration layer on its surface, is improving the corrosion proof good mechanical property that simultaneously has, and has extended the work-ing life of oil pipe, has good practical effect.
Embodiment
Below by specific embodiment, the present invention is described in further detail.
Embodiment mono-
The present embodiment provides a kind of raising transition pipeline corrosion proof method, and the method comprises the following steps:
1) front cleaning;
2) be installed: pack transition pipeline into frock;
3) preheating: the transition pipeline that is X80 by material is placed in air-heating furnace preheating, temperature is 375 ℃, the time is 30min;
4) nitrogen carbon ruthenium ion infiltrates: enter nitrogen carbon ruthenium ion through the transition pipeline of preheating and infiltrate stove, temperature is 600 ℃, and the time is 75min; Nitrogen carbon ruthenium ion penetration enhancer consists of by weight percentage: Na 2cO 311%, K 2cO 315%, NaCl24%, CO (NH 2) 240%, K 2sO 32%, CeCO 32%, LiOH5%, YCl 31%;
5) ion activation: the transition pipeline infiltrating through nitrogen carbon ruthenium ion enters ion activation stove, and temperature is 500 ℃, and the time is 75min; Ion activation penetration enhancer consists of by weight percentage: Na 2sO 47%, Na 2cO 310%, K 2cO 310%, NaCl22%, CO (NH 2) 240%, K 2sO 32%, CeCO 3l%, LiOH5%, KCl3%;
6) oxonium ion infiltrates: enter oxonium ion through the transition pipeline of ion activation and infiltrate stove, temperature is 400 ℃, and the time is 23min; Oxonium ion penetration enhancer consists of by weight percentage: Na 2cO 325%, NaNO 235%, NaNO 325%, CeSO 415%;
7) after, clean: remove transition pipeline surface penetration enhancer, water cleans up, and dries;
8) ion stabilizedization: transition pipeline enters ion stabilizedization stove, temperature is 150 ℃, the time is 30min; Ion stabilizer consists of by weight percentage: alkane 80%, naphthenic hydrocarbon 15%, polyolefine 4%, Sodium sulfate anhydrous.min(99) 1%;
9) immersion oil: the oil pipe after ion stabilizedization immerses the oil groove of splendid attire 10# machine oil, and the time is 7min.
Through the transition pipeline of aforesaid method processing, the thickness of compound layer and metal oxide layer is 40 μ m, and hardness is 550Hv, can be for a long time 500 ℃ of following uses, and it is 60mm that weld seam is processed width.
Embodiment bis-
The present embodiment provides a kind of raising transition pipeline corrosion proof method, and the method comprises the following steps:
1) front cleaning;
2) be installed: pack transition pipeline into frock;
3) preheating: the transition pipeline that is X80 by material is placed in air-heating furnace preheating, temperature is 300 ℃, time 40min;
4) nitrogen carbon ruthenium ion infiltrates: enter nitrogen carbon ruthenium ion through the transition pipeline of preheating and infiltrate stove, temperature is 550 ℃, and the time is 120min; Nitrogen carbon ruthenium ion penetration enhancer consists of by weight percentage: Na 2cO 310%, K 2cO 310%, NaCl23.97%, CO (NH 2) 240%, K 2sO 33%, CeCO 33%, LiOH10%, YCl 30.03%;
5) ion activation: the transition pipeline infiltrating through nitrogen carbon ruthenium ion enters ion activation stove, and temperature is 450 ℃, and the time is 120min; Ion activation penetration enhancer consists of by weight percentage: Na 2sO 45%, Na 2cO 312%, K 2cO 312%, NaCl20%, CO (NH 2) 230%, K 2sO 33%, CeCO 33%, LiOH10%, KCl5%;
6) oxonium ion infiltrates: enter oxonium ion through the transition pipeline of ion activation and infiltrate stove, temperature is 370 ℃, and the time is 30min; Oxonium ion penetration enhancer consists of by weight percentage: Na 2cO 320%, NaNO 240%, NaNO 330%, CeSO 410%;
7) after, clean: remove transition pipeline surface penetration enhancer, water cleans up, and dries;
8) ion stabilizedization: transition pipeline enters ion stabilizedization stove, temperature is 120 ℃, the time is 50min; Ion stabilizer consists of by weight percentage: alkane 93%, naphthenic hydrocarbon 5%%, polyolefine 1%, Sodium sulfate anhydrous.min(99) 1%;
9) immersion oil: the transition pipeline after ion stabilizedization immerses the oil groove of splendid attire 20# machine oil, and the time is 10min.
Through the transition pipeline of aforesaid method processing, the thickness of compound layer and described metal oxide layer is 35 μ m, 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 tri-
The present embodiment provides a kind of raising transition pipeline corrosion proof method, and the method comprises the following steps:
1) front cleaning;
2) be installed: pack transition pipeline into frock;
3) preheating: the transition pipeline that is X80 by material is placed in air-heating furnace preheating, temperature is 450 ℃, time 20min;
4) nitrogen carbon ruthenium ion infiltrates: enter nitrogen carbon ruthenium ion through the transition pipeline of preheating and infiltrate stove, temperature is 660 ℃, and the time is 30min; Nitrogen carbon ruthenium ion penetration enhancer consists of by weight percentage: Na 2cO 315%, K 2cO 320%, NaCl25%, CO (NH 2) 231%, K 2sO 32%, CeCO 31%, LiOH5%, YCl 31%;
5) ion activation: the transition pipeline infiltrating through nitrogen carbon ruthenium ion enters ion activation stove, and temperature is 550 ℃, and the time is 120min; Ion activation penetration enhancer consists of by weight percentage: Na 2sO 410%, Na 2cO 310%, K 2cO 310%, NaCl25%, CO (NH 2) 235%, K 2sO 31%, CeCO 31%, LiOH5%, KCl3%;
6) oxonium ion infiltrates: enter oxonium ion through the transition pipeline of ion activation and infiltrate stove, temperature is 430 ℃, and the time is 15min; Oxonium ion penetration enhancer consists of by weight percentage: Na 2cO 330%, NaNO 230%, NaNO 320%, CeSO 420%;
7) after, clean: remove transition pipeline surface penetration enhancer, water cleans up, and dries;
8) ion stabilizedization: transition pipeline enters ion stabilizedization stove, temperature is 200 ℃, the time is 20min; Ion stabilizer consists of by weight percentage: alkane 80.8%, naphthenic hydrocarbon 14%, polyolefine 5%, Sodium sulfate anhydrous.min(99) 0.2%;
9) immersion oil: the transition pipeline after ion stabilizedization immerses the oil groove of splendid attire 20# machine oil, and the time is 3min.
Through the transition pipeline of aforesaid method processing, the thickness of compound layer and described metal oxide layer is 50 μ m, and hardness is 600Hv, can be for a long time 500 ℃ of following uses, and it is 60mm that weld seam is processed width.
Embodiment tetra-
The present embodiment provides a kind of raising sucker rod corrosion proof method, and the method comprises the following steps:
1) front cleaning;
2) be installed: pack sucker rod into frock;
3) preheating: the sucker rod that is C level by material is placed in air-heating furnace preheating, temperature is 370 ℃, the time is 22min;
4) nitrogen carbon ruthenium ion infiltrates: enter nitrogen carbon ruthenium ion through the sucker rod of preheating and infiltrate stove, temperature is 600 ℃, and the time is 100min; Nitrogen carbon ruthenium ion penetration enhancer consists of by weight percentage: Na 2cO 312.95%, K 2cO 314%, NaCl23%, CO (NH 2) 238%, K 2sO 33%, CeCO 32%, LiOH7%, YCl 30.05%;
5) ion activation: the sucker rod infiltrating through nitrogen carbon ruthenium ion enters ion activation stove, and temperature is 480 ℃, and the time is 50min; Ion activation penetration enhancer consists of by weight percentage: Na 2sO 45%, Na 2cO 312%, K 2cO 315%, NaCl20%, CO (NH 2) 236%, K 2sO 32%, CeCO 31%, LiOH6%, KCl3%;
6) oxonium ion infiltrates: enter oxonium ion through the sucker rod of ion activation and infiltrate stove, temperature is 380 ℃, and the time is 20min; Oxonium ion penetration enhancer consists of by weight percentage: Na 2cO 324%, NaNO 334%, NaNO 230%, CeCO 312%;
7) after, clean: remove sucker rod surface penetration enhancer, water cleans up, and dries or naturally dries;
8) ion stabilizedization: sucker rod enters ion stabilizedization stove, temperature is 140 ℃, the time is 25min; Ion stabilizer consists of by weight percentage: alkane 85%, naphthenic hydrocarbon 12%, polyolefine 2.6%, Sodium sulfate anhydrous.min(99) 0.4%;
9) immersion oil: the sucker rod after ion stabilizedization immerses the oil groove of splendid attire 10# machine oil, and the time is 4min.
Through the sucker rod of aforesaid method processing, the thickness of compound layer and metal oxide layer is 40 μ m, and hardness is 550Hv, can be for a long time 500 ℃ of following uses.
Embodiment five
The present embodiment provides a kind of raising sucker rod corrosion proof method, and the method comprises the following steps:
1) front cleaning;
2) be installed: pack sucker rod into frock;
3) preheating: the sucker rod that is C level by material is placed in air-heating furnace preheating, temperature is 390 ℃, the time is 28min;
4) nitrogen carbon ruthenium ion infiltrates: enter nitrogen carbon ruthenium ion through the sucker rod of preheating and infiltrate stove, temperature is 620 ℃, and the time is 110min; Nitrogen carbon ruthenium ion penetration enhancer consists of by weight percentage: Na 2cO 311%, K 2cO 318%, NaCl22%, CO (NH 2) 238%, K 2sO 32.5%, CeCO 31.5%, LiOH6.95%, YCl 30.05%;
5) ion activation: the sucker rod infiltrating through nitrogen carbon ruthenium ion enters ion activation stove, and temperature is 520 ℃, and the time is 100min; Ion activation penetration enhancer consists of by weight percentage: Na 2sO 47%, Na 2cO 312%, K 2cO 315%, NaCl22%, CO (NH 2) 231%, K 2sO 31.5%, CeCO 31.5%, LiOH6%, KCl4%;
6) oxonium ion infiltrates: enter oxonium ion through the sucker rod of ion activation and infiltrate stove, temperature is 420 ℃, and the time is 28min; Oxonium ion penetration enhancer consists of by weight percentage: Na 2cO 328%, NaNO 334%, NaNO 225%, CeCO 313%;
7) after, clean: remove sucker rod surface penetration enhancer, water cleans up, and dries or naturally dries;
8) ion stabilizedization: sucker rod enters ion stabilizedization stove, temperature is 150 ℃, the time is 35min; Ion stabilizer consists of by weight percentage: alkane 92%, naphthenic hydrocarbon 6.1%, polyolefine 1%, Sodium sulfate anhydrous.min(99) 0.9%;
9) immersion oil: the sucker rod after ion stabilizedization immerses the oil groove of splendid attire 20# machine oil, and the time is 6min.
Through the sucker rod of aforesaid method processing, the thickness of compound layer and metal oxide layer is 48 μ m, and hardness is 600Hv, can be for a long time 500 ℃ of following uses.
Embodiment six
The present embodiment provides a kind of raising sucker rod corrosion proof method, and the method comprises the following steps:
1) front cleaning;
2) be installed: pack sucker rod into frock;
3) preheating: the sucker rod that is C level by material is placed in air-heating furnace preheating, temperature is 390 ℃, the time is 28min;
4) nitrogen carbon ruthenium ion infiltrates: enter nitrogen carbon ruthenium ion through the sucker rod of preheating and infiltrate stove, temperature is 620 ℃, and the time is 110min; Nitrogen carbon ruthenium ion penetration enhancer consists of by weight percentage: Na 2cO 312.1%, K 2cO 318%, NaCl23%, CO (NH 2) 234%, K 2sO 33%, CeCO 32%, LiOH7%, YCl 30.9%;
5) ion activation: the sucker rod infiltrating through nitrogen carbon ruthenium ion enters ion activation stove, and temperature is 520 ℃, and the time is 100min; Ion activation penetration enhancer consists of by weight percentage: Na 2sO 45%, Na 2cO 316%, K 2cO 315%, NaCl20%, CO (NH 2) 231%, K 2sO 31%, CeCO 31%, LiOH8%, KCl3%;
6) oxonium ion infiltrates: enter oxonium ion through the sucker rod of ion activation and infiltrate stove, temperature is 420 ℃, and the time is 28min; Oxonium ion penetration enhancer consists of by weight percentage: Na 2cO 324%, NaNO 338%, NaNO 225%, CeCO 313%;
7) after, clean: remove sucker rod surface penetration enhancer, water cleans up, and dries or naturally dries;
8) ion stabilizedization: sucker rod enters ion stabilizedization stove, temperature is 150 ℃, the time is 35min; Ion stabilizer consists of by weight percentage: alkane 89.5%, naphthenic hydrocarbon 6%, polyolefine 4%, Sodium sulfate anhydrous.min(99) 4.5%;
9) immersion oil: the sucker rod after ion stabilizedization immerses the oil groove of splendid attire 20# machine oil, and the time is 6min.
Through the sucker rod of aforesaid method processing, the thickness of compound layer and metal oxide layer is 45 μ m, and hardness is 580Hv, can be for a long time 500 ℃ of following uses.
Embodiment seven
The present embodiment provides a kind of raising sucker rod corrosion proof method, and the method comprises the following steps:
1) front cleaning;
2) be installed: pack sucker rod into frock;
3) preheating: the sucker rod that is C level by material is placed in air-heating furnace preheating, temperature is 370 ℃, the time is 22min;
4) nitrogen carbon ruthenium ion infiltrates: enter nitrogen carbon ruthenium ion through the sucker rod of preheating and infiltrate stove, temperature is 600 ℃, and the time is 100min; Nitrogen carbon ruthenium ion penetration enhancer consists of by weight percentage: Na 2cO 313%, K 2cO 318%, NaCl22.1%, CO (NH 2) 236%, K 2sO 32%, CeCO 32%, LiOH6%, YCl 30.9%;
5) ion activation: the sucker rod infiltrating through nitrogen carbon ruthenium ion enters ion activation stove, and temperature is 480 ℃, and the time is 50min; Ion activation penetration enhancer consists of by weight percentage: Na 2sO 46%, Na 2cO 312%, K 2cO 320%, NaCl20%, CO (NH 2) 231%, K 2sO 31%, CeCO 31%, LiOH6%, KCl3%;
6) oxonium ion infiltrates: enter oxonium ion through the sucker rod of ion activation and infiltrate stove, temperature is 380 ℃, and the time is 20min; Oxonium ion penetration enhancer consists of by weight percentage: Na 2cO 325%, NaNO 334%, NaNO 225%, CeCO 316%;
7) after, clean: remove sucker rod surface penetration enhancer, water cleans up, and dries or naturally dries;
8) ion stabilizedization: sucker rod enters ion stabilizedization stove, temperature is 140 ℃, the time is 25min; Ion stabilizer consists of by weight percentage: alkane 85%, naphthenic hydrocarbon 12%, polyolefine 2.6%, Sodium sulfate anhydrous.min(99) 0.4%;
9) immersion oil: the sucker rod after ion stabilizedization immerses the oil groove of splendid attire 10# machine oil, and the time is 4min.
Through the sucker rod of aforesaid method processing, the thickness of compound layer and metal oxide layer is 43 μ m, and hardness is 560Hv, can be for a long time 500 ℃ of following uses.
Embodiment eight
The present embodiment provides the thread gluing of a kind of solution oil well pipe box cupling and has improved its corrosion proof method, comprises the following steps:
1) front cleaning: remove oil well pipe coupling inner thread surface and oil contaminant and outside surface rusty stain;
2) be installed: the oil well pipe box cupling that is N80 by material packs frock into;
3) preheating: oil well pipe box cupling is placed in to air-heating furnace preheating, and temperature is 300 ℃, and the time is 40min;
4) nitrogen carbon ruthenium ion infiltrates: enter nitrogen carbon ruthenium ion through the oil well pipe box cupling of preheating and infiltrate stove, temperature is 550 ℃, and the time is 120min; Nitrogen carbon ruthenium ion penetration enhancer consists of by weight percentage: Na 2cO 310%, K 2cO 310%, NaCl23.97%, CO (NH 2) 240%, K 2sO 33%, CeCO 33%, LiOH10%, YCl 30.03%;
5) ion activation: the oil well pipe box cupling infiltrating through nitrogen carbon ruthenium ion enters ion activation stove, and temperature is 450 ℃, and the time is 120min; Ion activation penetration enhancer consists of by weight percentage: Na 2sO 45%, Na 2cO 312%, K 2cO 312%, NaCl20%, CO (NH 2) 230%, K 2sO 33%, CeCO 33%, LiOH10%, KCl5%;
6) oxonium ion infiltrates: enter oxonium ion through the oil well pipe box cupling of ion activation and infiltrate stove, temperature is 370 ℃, and the time is 30min; Oxonium ion penetration enhancer consists of by weight percentage: Na 2cO 320%, NaNO 340%, NaNO 230%, CeCO 310%;
7) after, clean: remove the inside and outside surperficial penetration enhancer of oil well pipe box cupling, water cleans up, dry or naturally dry;
8) ion stabilizedization: oil well pipe box cupling enters ion stabilizedization stove, temperature is 100 ℃, the time is 40min; Ion stabilizer consists of by weight percentage: alkane 80%, naphthenic hydrocarbon 15%, polyolefine 4%, Sodium sulfate anhydrous.min(99) 1%;
9) immersion oil: the oil well pipe box cupling after ion stabilizedization immerses the oil groove of splendid attire 10# or 20# machine oil, and the time is 3min.
Through the oil well pipe box cupling of aforesaid method processing, the thickness of compound layer and metal oxide layer is 20 μ m, and hardness is 550Hv, can be for a long time 500 ℃ of following uses, and its anti-stick button performance reaches API standard.
Embodiment nine
The present embodiment provides the thread gluing of a kind of solution oil well pipe box cupling and has improved its corrosion proof method, comprises the following steps:
1) front cleaning: remove oil well pipe coupling inner thread surface and oil contaminant and outside surface rusty stain;
2) be installed: the oil well pipe box cupling that is N80 by material packs frock into;
3) preheating: oil well pipe box cupling is placed in to air-heating furnace preheating, and temperature is 450 ℃, and the time is 20min;
4) nitrogen carbon ruthenium ion infiltrates: enter nitrogen carbon ruthenium ion through the oil well pipe box cupling of preheating and infiltrate stove, temperature is 660 ℃, and the time is 30min; Nitrogen carbon ruthenium ion penetration enhancer consists of by weight percentage: Na 2cO 315%, K 2cO 320%, NaCl25%, CO (NH 2) 231%, K 2sO 32%, CeCO 31%, LiOH5%, YCl 31%;
5) ion activation: the oil well pipe box cupling infiltrating through nitrogen carbon ruthenium ion enters ion activation stove, and temperature is 550 ℃, and the time is 30min; Ion activation penetration enhancer consists of by weight percentage: Na 2sO 410%, Na 2cO 310%, K 2cO 310%, NaCl25%, CO (NH 2) 235%, K 2sO 31%, CeCO 31%, LiOH5%, KCl3%;
6) oxonium ion infiltrates: enter oxonium ion through the oil well pipe box cupling of ion activation and infiltrate stove, temperature is 430 ℃, and the time is 15min; Oxonium ion penetration enhancer consists of by weight percentage: Na 2cO 330%, NaNO 330%, NaNO 220%, CeCO 320%;
7) after, clean: remove the inside and outside surperficial penetration enhancer of oil well pipe box cupling, water cleans up, dry or naturally dry;
8) ion stabilizedization: oil well pipe box cupling enters ion stabilizedization stove, temperature is 100 ℃, the time is 20min; Ion stabilizer consists of by weight percentage: alkane 93%, naphthenic hydrocarbon 5%, polyolefine 1%, Sodium sulfate anhydrous.min(99) 1%;
9) immersion oil: the oil well pipe box cupling after ion stabilizedization immerses the oil groove of splendid attire 10# machine oil, and the time is 10min.
Through the oil well pipe box cupling of aforesaid method processing, the thickness of compound layer and metal oxide layer is 25 μ m, and hardness is 580Hv, can be for a long time 500 ℃ of following uses, and its anti-stick button performance reaches API standard.
Embodiment ten
The present embodiment provides the thread gluing of a kind of solution oil well pipe box cupling and has improved its corrosion proof method, comprises the following steps:
1) front cleaning: remove oil well pipe coupling inner thread surface and oil contaminant and outside surface rusty stain;
2) be installed: the oil well pipe box cupling that is N80 by material packs frock into;
3) preheating: oil well pipe box cupling is placed in to air-heating furnace preheating, and temperature is 375 ℃, and the time is 30min;
4) nitrogen carbon ruthenium ion infiltrates: enter nitrogen carbon ruthenium ion through the oil well pipe box cupling of preheating and infiltrate stove, temperature is 600 ℃, and the time is 75min; Nitrogen carbon ruthenium ion penetration enhancer consists of by weight percentage: Na 2cO 311%, K 2cO 315%, NaCl24%, CO (NH 2) 240%, K 2sO 32%, CeCO 32%, LiOH5%, YCl 31%;
5) ion activation: the oil well pipe box cupling infiltrating through nitrogen carbon ruthenium ion enters ion activation stove, and temperature is 500 ℃, and the time is 75min; Ion activation penetration enhancer consists of by weight percentage: Na 2sO 47%, Na 2cO 310%, K 2cO 310%, NaCl22%, CO (NH 2) 240%, K 2sO 32%, CeCO 31%, LiOH5%, KCl3%;
6) oxonium ion infiltrates: enter oxonium ion through the oil well pipe box cupling of ion activation and infiltrate stove, temperature is 400 ℃, and the time is 23min; Oxonium ion penetration enhancer consists of by weight percentage: Na 2cO 325%, NaNO 335%, NaNO 225%, CeCO 315%;
7) after, clean: remove the inside and outside surperficial penetration enhancer of oil well pipe box cupling, water cleans up, dry or naturally dry;
8) ion stabilizedization: oil well pipe box cupling enters ion stabilizedization stove, temperature is 150 ℃, the time is 30min; Ion stabilizer consists of by weight percentage: alkane 80.8%, naphthenic hydrocarbon 14%, polyolefine 5%, Sodium sulfate anhydrous.min(99) 0.2%;
9) immersion oil: the oil well pipe box cupling after ion stabilizedization immerses the oil groove of splendid attire 20# machine oil, and the time is 3min.
Through the oil well pipe box cupling of aforesaid method processing, the thickness of compound layer and metal oxide layer is 25 μ m, and hardness is 580Hv,, can be for a long time 500 ℃ of following uses, its anti-stick button performance reaches API standard.
The present invention is suitable for the material of all manufacture transition pipeline: as the transition pipeline of X42, X60, X70, X80 all size wall thickness; The material of all manufacture sucker rods: as the sucker rod of C level, K level, D level, KD level, H level, HL level, HY level all size; The material of all manufacture oil well pipes and oil well pipe box cupling: as oil well pipe and the oil well pipe box cupling of J55, K55, N80, N80-Q, P110, Q125 all size wall thickness.
The oil pipe and the oil well pipe box cupling that adopt method processing provided by the present invention, its solidity to corrosion is greatly improved, and has good mechanical property simultaneously.
One, corrosion resistance test
Test example one: hydrogen sulfide corrosion resistance can be tested
Sample number is three X80 transition pipeline, and No. 1 sample is transition pipeline prepared by embodiment mono-, and No. 2 samples are transition pipeline prepared by embodiment bis-, and No. 3 samples are transition pipeline prepared by embodiment tri-.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).
Table 1 test-results
Figure BDA0000481882800000191
From table 1, all do not ftracture through test in 720 hours.Show that X80 transition pipeline is after method provided by the present invention is processed, performance can reach application request
Test example two: carbon dioxide corrosion-resistant performance test
No. 1 sample is untreated samples, is the N80 oil well pipe of Steel Tube in Tianjin seamless steel tubing mill production; No. 2 samples are that sample is processed in nitriding, for adopting the mode of the embodiment 1 of CN102560507A to be prepared from above-mentioned N80 oil well pipe; No. 3 samples are the product of embodiment tri-.In the autoclave that test is 1MPa at pressure, carry out.Concrete testing data is in table 2.
Table 2 sample is at CO 2erosion rate in distilled water
Figure BDA0000481882800000192
From the data of table 2, the erosion rate of No. 2 samples and No. 3 samples is obviously slow than the erosion rate of No. 1 sample, and the erosion rate of No. 3 samples is slower than the erosion rate of No. 2 samples.In addition, sample is containing CO 2distilled water in corrode after certain hour, by the naked eye, No. 1 specimen surface has the corrosive film of obvious layering, and surface is uneven, some corrosive films come off.Meanwhile, being uneven also appears in No. 2 specimen surfaces, and the corrosive film of No. 3 specimen surfaces and sample combine completely.
In sum, provide after corrosion proof method processing through provided by the present invention, the corrosion resistance of oil well pipe significantly improves.
In addition, also investigated temperature to the anti-CO of N80 oil well pipe 2the impact of corrosive nature.No. 1 sample is untreated samples, is the N80 oil well pipe of Steel Tube in Tianjin seamless steel tubing mill production; No. 3 samples are the product of embodiment tri-.The composition of simulated oil water in field is in table 3.Test-results is in table 4.
Table 3 oil field water-quality constituents
Figure BDA0000481882800000201
The Corrosion Mass-loss of sample and surface corrosion material mass under table 4 differing temps
Corrosion temperature 40℃ 60℃ 90℃
No. 1 sample Corrosion Mass-loss (mg) 570/293 683/338 72/38
No. 3 sample Corrosion Mass-loss (mg) 480/200 88/53 42/24
From table 4, under condition of different temperatures, No. 3 samples are in the erosion rate difference at different depths place, but all much smaller than No. 1 sample.
Test example three: the corrosive nature test under atmospheric condition
Sample is J55 and two kinds of tubing materials of N80, and the 1-3 sample in table 5 is untreated samples, is the J55 oil well pipe of Steel Tube in Tianjin seamless steel tubing mill production; 4-6 sample is that sample is processed in nitriding, for adopting the mode of the embodiment 1 of CN102560507A to be prepared from above-mentioned J55 oil well pipe; 7-9 sample is that the present invention processes sample, for adopting the method for embodiment tri-to be prepared from above-mentioned J55 oil well pipe sample.1-9 sample in his-and-hers watches 5 has carried out respectively the Corrosion Mass-loss test that salt solution adds hydrogen peroxide.Concrete test-results is in table 5.
Table 5J55 oil well pipe mass loss corrosion stability test-results
Figure BDA0000481882800000211
Figure BDA0000481882800000221
As can be seen from Table 5, the oil well pipe of J55 material, untreated samples, nitriding processing sample and the present invention process the mass loss ratio of sample under identical test conditions and are respectively 68.6%, 2.5% and 1%.Hence one can see that, and compared with untreated samples, the corrosion resistance that the present invention processes sample significantly strengthens.Meanwhile, the corrosion resistance that the present invention processes sample is also better than nitriding and processes sample.
1-3 sample in table 6 is untreated samples, is the N80 oil well pipe of Steel Tube in Tianjin seamless steel tubing mill production; 4-8 sample is that sample is processed in nitriding, for adopting the mode of the embodiment 1 of CN102560507A to be prepared from above-mentioned N80 oil well pipe; 9-11 sample is the product of embodiment tri-.1-11 sample in his-and-hers watches 6 has carried out respectively the Corrosion Mass-loss test that salt solution adds hydrogen peroxide.Concrete test-results is in table 6.
Table 6N80 oil well pipe mass loss corrosion stability test-results
Figure BDA0000481882800000222
As can be seen from Table 6, the oil well pipe of N80 material, the mass loss ratio of the product of untreated samples, nitriding processing sample and embodiment eight under identical test conditions is respectively 121%, 6% and 1%.Hence one can see that, and compared with untreated samples, the corrosion resistance of the product of embodiment eight extremely significantly strengthens.Meanwhile, the corrosion resistance of the product of embodiment tri-also will obviously be better than nitriding processing sample.
Test example four: salt fog resistance test
J55, N80 and tri-kinds of tubing materials of N80-Q have been carried out to the salt-fog test of standard, J55 and N80 are the oil well pipe that Steel Tube in Tianjin seamless steel tubing mill produces, and N80-Q is the oil well pipe that Xin Peng source, Liaocheng oil country tubular goods company limited produces.No. 1 sample group is untreated samples group, and the sample of above-mentioned material is without any processing; J55 sample in No. 2 sample groups is that the oil well pipe of the J55 material of Steel Tube in Tianjin seamless steel tubing mill production adopts the mode of the embodiment 1 of CN102560507A to be prepared from, N80 sample in No. 2 sample groups is that the oil well pipe of the N80 material of Steel Tube in Tianjin seamless steel tubing mill production adopts the mode of the embodiment 1 of CN102560507A to be prepared from, and the N80-Q sample in No. 2 sample groups is that the oil well pipe of the N80-Q material of Xin Peng source, Liaocheng oil country tubular goods company limited production adopts the mode of the embodiment 1 of CN102560507A to be prepared from; J55 sample in No. 3 sample groups is that the oil well pipe of the J55 material of Steel Tube in Tianjin seamless steel tubing mill production is prepared from according to the test conditions of embodiment mono-and step, N80 sample in No. 3 sample groups is the product of embodiment tri-, and the N80-Q sample in No. 3 sample groups is that the oil well pipe of the N80-Q material of Xin Peng source, Liaocheng oil country tubular goods company limited production is prepared from according to the test conditions of embodiment eight and step.Salt-fog test the results are shown in Table 7, in table data be sample time of starting to get rusty (hour).Wherein, each testing data is the mean value of 3 numerical value.
Table 7 test-results
Sample group # J55 N80 N80-Q Corrosion stability ratio
1 0.5 0.5 0.5 1
2 17 17 17 34
3 208 185 192 390
As can be seen from Table 7, concerning the oil well pipe of J55, N80 and tri-kinds of materials of N80-Q, the time that the sample of the sample of No. 1 sample group and No. 2 sample groups starts to get rusty is 0.5 hour and 17 hours respectively, and the sample of No. 3 sample groups just starts to get rusty about 200 hours, be later than the sample of No. 1 sample group and the sample of No. 2 sample groups far away.Therefore, after method provided by the present invention is processed, the solidity to corrosion of sample obviously strengthens.
Two, mechanical property test
Tubing material, after method provided by the present invention is processed, because surface has formed the compound layer of high rigidity, although increased surperficial wear resistance and corrosion stability, also can reduce the toughness of tubing material simultaneously to some extent.Mechanical property does not reach standard (API) requirement of American Petroleum Institute (API).Therefore we have repeatedly carried out mechanical property test in the process of exploitation raising oil pipe solidity to corrosion method, to guarantee that oil pipe after treatment can meet API standard.
Mechanical property test comprises shock test and two contents of tension test.Technical indicator has 4, i.e. ballistic work, yield strength, tensile strength and unit elongation.
Test example five: shock test
J55 and N80 bi-material are carried out to shock test, the results are shown in Table 8.The oil well pipe that 1,2, No. 3 sample in material J55 is respectively the J55 material of Steel Tube in Tianjin seamless steel tubing mill production is prepared from according to the test conditions of embodiment mono-and step.Corresponding embodiment eight, embodiment nine and the prepared sample of embodiment ten respectively of 1,2, No. 3 sample in material N80.
Table 8 is processed the ballistic work of rear tubing material
Figure BDA0000481882800000241
Figure BDA0000481882800000251
As can be seen from Table 8, the raw-material ballistic work of J55 is 53.5, although ballistic work drops to 35 after processing according to the method for embodiment mono-, but still far above the standard (>=15) of American Petroleum Institute (API).N80 material and J55 materials similar, although ballistic work declines after processing according to the method for embodiment eight, equally also far above the standard of American Petroleum Institute (API).
Test example six: tension test
J55, N80 and tri-kinds of tubing materials of N80-Q, after method provided by the present invention is processed, have been carried out to tension test, and test-results is in table 9.The oil well pipe that 1,2, No. 3 sample in material J55 is respectively the J55 material of Steel Tube in Tianjin seamless steel tubing mill production is prepared from according to the test conditions of embodiment mono-and step.Corresponding embodiment eight, embodiment nine and the prepared sample of embodiment ten respectively of 1,2, No. 3 sample in material N80.The oil well pipe that 1,2, No. 3 sample in material N80-Q is respectively the N80-Q material of Xin Peng source, Liaocheng oil country tubular goods company limited production is prepared from according to the test conditions of embodiment bis-and step.
Table 9 is processed the tensile property of rear tubing material
As can be seen from Table 9, all three kinds of materials are after method provided by the present invention is processed, and yield strength, tensile strength and the unit elongation of material all reached the prescribed value of API standard.
Test example seven: anti-stick button performance test
N80 box cupling is carried out to anti-stick button performance test, the results are shown in Table 10.No. 1 sample is that the oil well pipe box cupling of Steel tube Co., Ltd of the Baogang Stocks Trading Co. N80 material of producing is prepared from according to the test conditions of embodiment eight and step, and No. 2 samples are that the oil well pipe box cupling of Steel tube Co., Ltd of the Baogang Stocks Trading Co. N80 material of producing is prepared from according to the test conditions of embodiment nine and step.
Table 10 is processed the rear anti-stick button performance test of box cupling
Figure BDA0000481882800000262
Figure BDA0000481882800000271
Figure BDA0000481882800000281
As can be seen from Table 10, oil well pipe box cupling is after method provided by the present invention is processed, and anti-stick button performance reaches the prescribed value of API standard.
In sum, through method provided by the invention oil pipe after treatment, its corrosion resisting property significantly strengthens, and has good mechanical property simultaneously, can reach the regulation of API standard, can meet the requirement of actual use.
The foregoing is only the preferred embodiments of the present invention and test example, 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. improve the corrosion proof method of oil pipe, it is characterized in that, comprise the following steps:
1) front cleaning: greasy dirt and the rusty stain of removing oil pipe surfaces externally and internally;
2) be installed: pack oil pipe into frock;
3) preheating: oil pipe is placed in to air-heating furnace preheating, and temperature is 300～450 ℃, and the time is 20～40min;
4) nitrogen carbon ruthenium ion infiltrates: enter nitrogen carbon ruthenium ion through the oil pipe of preheating and infiltrate stove, temperature is 550～660 ℃, and the time is 30～120min; Nitrogen carbon ruthenium ion penetration enhancer consists of by weight percentage: Na 2cO 310%～15%, K 2cO 310%～20%, NaCl20%～25%, CO (NH 2) 230%～40%, K 2sO 31%～3%, CeCO 31%～3%, LiOH5%～10%, YCl 30.03%～1%;
5) ion activation: the oil pipe infiltrating through nitrogen carbon ruthenium ion enters ion activation stove, and temperature is 450～550 ℃, and the time is 30～120min; Ion activation penetration enhancer consists of by weight percentage: Na 2sO 45%～10%, Na 2cO 310%～20%, K 2cO 310%～20%, NaCl20%～25%, CO (NH 2) 230%～40%, K 2sO 31%～3%, CeCO 31%～3%, LiOH5%～10%, KCl3%～5%;
6) oxonium ion infiltrates: enter oxonium ion through the oil pipe of ion activation and infiltrate stove, temperature is 370～430 ℃, and the time is 15～30min; Oxonium ion penetration enhancer consists of by weight percentage: Na 2cO 320%～30%, NaNO 330%～40%, NaNO 220%～30%, CeCO 310%～20%;
7) after, clean: remove the inside and outside surperficial penetration enhancer of oil pipe, water cleans up, dry or naturally dry;
8) ion stabilizedization: oil pipe enters ion stabilizedization stove, temperature is 120～200 ℃, the time is 20～50min; Ion stabilizer consists of by weight percentage: alkane 80%～93%, naphthenic hydrocarbon 5%～15%, polyolefine 1%～5%, Sodium sulfate anhydrous.min(99) 0.2%～1%;
9) immersion oil: the oil pipe after ion stabilizedization immerses the oil groove of splendid attire 10～20# machine oil, and the time is 3～10min.
2. the corrosion proof method of raising oil pipe according to claim 1, it is characterized in that, along with the carrying out of controlled ion processing, according to the decline rule of active ion concentration, by chemical analysis detection means, ionic concn is analyzed, can quantitatively be regulated 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.
3. the corrosion proof method of raising oil pipe according to claim 1, is characterized in that, described oil pipe comprises collar piping, protective casing, sand string, port sleeve pipe, sucker rod, transition pipeline, oil well pipe, sucker-rod coupling and oil well pipe box cupling.
4. the corrosion proof method of raising oil pipe according to claim 1, is characterized in that, in described step 3), preheating temperature is 370～390 ℃, and the time is 22～28min.
5. the corrosion proof method of raising oil pipe according to claim 1, is characterized in that, in described step 4), nitrogen carbon ruthenium ion infiltration furnace temperature is 600～620 ℃, and the time is 100～110min; Described nitrogen carbon ruthenium ion penetration enhancer consists of by weight percentage: Na 2cO 311%～13%, K 2cO 314%～18%, NaCl22%～23%, CO (NH 2) 234%～38%, K 2sO 32%～3%, CeCO 31.5%～2%, LiOH6%～7%, YCl 30.05%～0.9%.
6. the corrosion proof method of raising oil pipe according to claim 1, is characterized in that, described step 5) intermediate ion activation furnace temperature is 480～520 ℃, and the time is 50～100min; Described ion activation penetration enhancer consists of by weight percentage: Na 2sO 45%～7%, Na 2cO 312%～16%, K 2cO 315%～20%, NaCl20%～22%, CO (NH 2) 231%～36%, K 2sO 31%～2%, CeCO 31%～1.5%, LiOH6%～8%, KCl3%～4%.
7. the corrosion proof method of raising oil pipe according to claim 1, is characterized in that, in described step 6), oxonium ion infiltration furnace temperature is 380～420 ℃, and the time is 20～28min; Described oxonium ion penetration enhancer consists of by weight percentage: Na 2cO 324%～28%, NaNO 334%～38%, NaNO 225%～30%, CeCO 312%～16%.
8. the corrosion proof method of raising oil pipe according to claim 1, is characterized in that, the temperature of described step 8) intermediate ion stabilization stove is 140～150 ℃, and the time is 25～35min; Ion stabilizer consists of by weight percentage: alkane 85%～92%, naphthenic hydrocarbon 6%～12%, polyolefine 1%～4%, Sodium sulfate anhydrous.min(99) 0.4%～0.9%.
9. the corrosion proof method of raising oil pipe according to claim 1, is characterized in that, the time in described step 9) in the oil groove of oil pipe immersion splendid attire 10～20# machine oil is 4～6min.
10. the thread gluing of solution oil well pipe box cupling and its corrosion proof method of raising, is characterized in that, described box cupling adopts the method described in claim 1-9 any one to infiltrate processing.
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