CN1729284A - Cleaning compositions for oil-gas wells, well lines, casings, equipment, storage tanks, etc., and method of use - Google Patents
Cleaning compositions for oil-gas wells, well lines, casings, equipment, storage tanks, etc., and method of use Download PDFInfo
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- CN1729284A CN1729284A CN 200380107178 CN200380107178A CN1729284A CN 1729284 A CN1729284 A CN 1729284A CN 200380107178 CN200380107178 CN 200380107178 CN 200380107178 A CN200380107178 A CN 200380107178A CN 1729284 A CN1729284 A CN 1729284A
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Abstract
The invention relates to a high flash point aromatic, aliphatic hydrocarbon petroleum solvents optionally combined with specific ingredients to provide maximum solvency, penetration, saturation, dissipation and dispersion of the solid deposits. It has very low evaporation, high flash point (>100 DEG F.), low freezing pour point, corrosion protection and increased cleaning efficiency.
Description
Technical field
The present invention relates to use chemical composition to remove and the settling of rectification such as paraffin, bituminous matter and gas hydrate, these settlings are relevant with down-hole structure, flow line, pipeline, coating, storage tank, jar end etc.
Background technology
Efficient recovery gentle depending on of oil kept clean pipeline and pumping equipment from producing well or gas recovery well, storage tank or logistics or pipeline.Oil well is owing to the obstruction of paraffin, sulphur, heavy oil and tar byproduct has produced some problems.These remnants have stopped up and have been transported to ground pipeline and have stopped up pump and the metal bar that is used for from the gentle equipment of well extraction oil oil is gentle.
The common prior art method that is used for this cleaning is made up of the product of four kinds of main types.First method is used low-flash corrodibility mixture, and this mixture is mixed by aromatic series and/or aliphatic petroleum hydrocarbon or halohydrocarbon.These products can contain or not contain tensio-active agent, and tensio-active agent can make this product and water mix to be incorporated in the water emulsification to increase cleaning efficiency.The existence of water reduces the efficient of these products significantly.The neat solvent mixture is immiscible in water and can not penetrates in the dirt.The adding of emulsifying agent can mix solvent with water.Yet gained solvent/emulsion system is not the effective cleaning agent as neat solvent.
Second method utilization bacterium removes to digest paraffin and tar base dirt.This system depends on the temperature of well to a great extent, and very responsive to environmental factors such as oil composition.This technology is generally all slow than solvent base technology.
The third method is based on aqueous base, hard surface cleaner.These sanitising agents are mixed with alkaline buider usually; Water-soluble solvent such as glycol ether, alcohol and tensio-active agent.The alkalescence buider is made up of oxyhydroxide, carbonate, phosphoric acid salt and silicate.Water-soluble solvent generally is made up of ethylene glycol, glycol ether, propylene glycol and dipropylene glycol.Usually ether classifies as the fatty acid soaps of alkylphenol ethoxylate, straight-chain alcohol ethoxylate, alkyl or aryl sulfonate, amphoterics and alkanolamide.These basic prod are more much lower than the efficient of solvent mixture usually to the cleaning efficiency of paraffin and other oil base dirt.
The 4th kind of method of cleaning comprises uses the deep fat that is injected in the well.Deep fat melts, and makes the paraffin dissolving and they are taken out of on the ground.Although this method efficient is very high, be to use deep fat to produce hazardous condition.
But many problems have appearred when being to use solvent above-mentioned.For example, halohydrocarbon has adverse influence to workers ' health, and it is the chemical substance that consumes ozone.Therefore the non-halogenated solvent of many uses is flammable or inflammable, has increased the risk of catching fire and exploding and higher Insurance Charges.In addition, according to the regulation of government, it is expensive handling spent solvent.In fact, most of halogenated solvents all carry out the height taxation, and are in the process that is eliminated.
Except that above-mentioned problem, government regulations strictly limits the quantity that those can be dispersed into the volatile organic compounds (VOCs) in the atmosphere recently.These restrictions are set by Bureau for Environmental Protection (Environment Protection Agency); as " action that purifies air (Clean AirAct) " regulation, these restrictions are to decide by the solvent contrast waste product of the starting material product of coming in or the solvent of finished product.
Bacterium base scavenging solution has other shortcoming equally.This processing requirements oil well is closed several stars
Phase is to set up bacterial colony.When pump restarted, bacterium was discharged with oil, thereby caused bacterial colony to exhaust rapidly and this causes needs further to be handled.
Owing to there are many different global geographic positions in seasonal effect and temperature variation, described seasonal effect and temperature variation trend towards influence and are changing (rheological changes) than the more significant rheology of low ambient temperature.For example; often be submerged in about 300+ foot and present 40-45 the deep water offshore field of low ambient temperature and flow line is more prone to cement and stops up (viscositybuildups); this is the cause owing to wax crystal and hydrate generation, thereby causes long cleaning stop time.
During Oil extraction, for the best production, cleaning and elimination processing unit, flow line, oil well structure, pipe box and storage tank and this solid deposits at jar end are epochmaking to keep production efficiency and use.
For this application, operable usually conduct and antidote have been arranged.For example, such as aliphatics and/or aromatic hydrocarbons (HC ' s), aliphatics fat C
5-C
22Monocarboxylic C
1-C
5The organic solvent of alkyl ester and so on use separately or be used in combination for this removing and/or corrigent other compound.
Yet because one or more following character, thereby perhaps this mode is not best and is not often can be received:
● serious danger is for example caught fire, healthy and reactivity
● destroy ecological
● storage and transport condition
● overall suitability and competition character
● the fire hazard and the high risk of explosion that cause by low-flash
● because toxic, corrosive nature and the reactive health problem that causes
● need to observe transportation DOT rule
● freezing point and pour point are low inadequately
And when these solvents were used separately, generally speaking its lacked solvency power, and can cause being subject to one or more above-mentioned restricted conditions when mixing.
Summary of the invention
The dirt that accumulates in Sweet natural gas and oil well and the processing unit has many kinds, as paraffin, tar byproduct, and other sticking dirt.In addition, gathering dirt (scale) in this well and equipment is a problem.Dirt is the accumulation of (but being not limited to) tosca thing and/or ferric oxide and other hard residual material normally.Composition of the present invention can be removed many kinds and Sweet natural gas and Oil extraction and relevant dirt and the dirt of technology effectively, has therefore improved oil production technology.
The present invention relates to a kind of chemical composition, it is for overcoming one or more above-mentioned deficiency formulated.Experiment shows with current commercially available and applicable technology with economic interests of the other advantage of conduct to be compared, and embodiment of the present invention has good efficient and multi-functional universal performance.
For effective removing settling, this cleaning compositions provides excellent wetting ability, dispersive ability and dissolving power.These compositions dissolve settling at lower concentration and limited duration of contact.Embodiment of the present invention can be in extreme temperature range, that is, use in for example about 40 ℃～about 230 °F, and it is difficult for by the salt emulsifying water.
Embodiment of the present invention comprise and are used for removing oils, paraffin, and the composition and the method for other relevant dirt and asphaltene deposits thing from underground structure, oil-bearing formation structure, Oil Guide structure and oily processing units, this method realizes by cleaning compositions is injected in these positions, and this cleaning compositions comprises that the Tag closed cup flash point (tag closed cup flashpoint) of about 1～99% weight is greater than 100 rudimentary naphthalene (C
10～C
15) at least a C of aromatic solvent mixture and about 1～40 weight %
12～C
15High flash point light oil (naptha).
Another embodiment of the invention is composition and the method that prevents that paraffin, dirt and other settling from adhering to and gathering, and comprises that use comprises that also the composition of the fatty acid alkyl ester mixture of about 1～25 weight % is coated with the internal surface of unction processing units.
The detailed description of invention
The embodiment of this cleaning compositions comprises:
A) mixture of organic solvent, wherein this mixture comprises that common content is up to the reductive naphthalene aromatic solvent of about 70 weight %, aliphatics petroleum fractions and common alicyclic light oil.
These compositions also comprise:
B) be up at least a fatty acid alkyl ester of about 25 weight %;
C) be up at least a in tensio-active agent, emulsifying agent, wetting agent, permeate agent, sequestrant and the coupling agent of about 10 weight %; And
D) be up to the alkylene glycol alkyl oxide of about 10 weight %.
The component total amount of said composition comprises the composition of 100 weight %.
By the mixing and/or utilizing of polymerization flow improver or oily low friction compound, can make the low and mobile enhancing of viscosity drop, that is, can improve pumping power.The example of this material comprises, for example, and the high molecular synthetic polymer OFR-2 that Clearwater sells; Also be the very high-molecular weight anionoid polymerization suspension FRA-700 that sells by Clearwater; Also be the high molecular weight polyacrylamide FRA-175 that sells by Clearwater.These flow enhancing agents can comprise the polyolefine part, and can comprise the olefin unit of non-olefinic.This flow enhancing agent has sufficiently high molecular weight so that polymkeric substance reduces fluid flow resistance.Suitable polymkeric substance can have about 1 megadalton and higher and be up to 2,500 ten thousand daltonian molecular weight.
Useful rudimentary naphthalene aromatic solvent mixture preferably comprises flash-point greater than 100 preferred 150 or bigger C in the present composition
10～C
15Aromatic hydrocarbon compound.Demonstrated to the kind of spendable aromatic solvent is to have 1% naphthalene and less than aromatic series 100ND, aromatic series 150ND or the aromatic series 200ND (product of Exxon Mobil) of 50ppm toluene and have 0.1% naphthalene and the aromatic series 200super ND of 50ppm toluene.
Useful aliphatics mixture preferably has the C that surpasses about 200 flash-points in the present composition
12～C
15ISO or ring paraffinic light oil.
In addition, also can use C
10～C
15Different paraffinic composition is to increase the dissolving power of paraffin.
For example, the additive of composition comprises (but being not limited to) following material:
Usually, this composition comprises the C up to about 25 weight %
4～C
22The C of lipid acid
1～C
8Alkyl ester, it has following general formula:
R wherein
1For can be saturatedly maybe can contain undersaturated C
4～C
22Straight or branched alkyl, and R
2Be C
1～C
8The straight or branched alkyl.Fatty acid ester is derived from natural product, so it comprises more than a kind of ester; Therefore this fatty acid ester is a mixture.Usually, fatty acid ester originates from the esterification of lipid acid, perhaps originates from the transesterification of animal tallow or vegetables oil.
The fatty acid alkyl ester mixture more preferably comprises C
4～C
2The methyl of lipid acid, ethyl, n-propyl, sec.-propyl or n-butyl.Most preferably, this fatty acid alkyl ester mixture comprises methyl ester.This fatty acid methyl ester mixture preferably has 40 cloud points and is the mixture that increases the high degree of unsaturation of dissolving power.More preferably, the fatty acid methyl ester mixture originates from soybean, rapeseed oil (canola) and other vegetables oil, and it has 20 °～32 cloud point and 90～130 iodine number.
Tensio-active agent also may join and be suitable for cleaning as oil and greasy dirt for example in the composition of ethoxylized nonylphenol.
Straight-chain alcohol ethoxylate.The alkanol amine salt of Witco 1298 Soft Acid sulfo-succinic acid, phosphoric acid ester.Alcohol sulfate, quaternary ammonium compound amphoterics, sulfonated.Sorbitanic and derivative of fatty acid, sodium xylene sulfonate.
Exxate 900,1000 and 1200 and C
9-C
12Branching contains the acetic ester of oxygen alcohol.
DBE (Du Pont) is the mixture of the dimethyl succinate of the dimethyl adipate of Methyl glutarate, 10～75 weight % of 45～75 weight % and 15～30 weight %.
Being up to 20% low alkyl group alcohol ester can be used as permeate agent, adds and/or be used to increase effect for hydrophilic dirt as coupling agent.Example to the useful low alkyl group glycol ethers of this composition comprises methyl, ethyl, propyl group and the butyl ether of dipropylene glycol monomethyl ether, tripropylene glycol monomethyl ether, ethylene glycol and Diethylene Glycol or their mixture.The same discovery as permeate agent N-Methyl pyrrolidone usefully.
Usually, embodiment of the present invention can comprise:
● be up to the C of the lipid acid of 25 volume %
6Or higher alkyl esters more;
● be up to the HLB value of 10 volume % and have the functional additive of specific improvement effect such as tensio-active agent, emulsifying agent, wetting and permeate agent, chelating and coupling agent with 8-15;
● for example be up to the ORGANIC SOLVENT MIXTURES of about 70 volume %, it comprises petroleum fractions hydrocarbon polymer aliphatics, aromatic series, alicyclic glycol ether and ester, and described ORGANIC SOLVENT MIXTURES has strong dissolving power and not dangerous;
● other compound, it can give characteristic feature and improve ins and outs superpower as being used for, moistening, permeate and dissolve huge and stone sedimental KB/HLB value; Or
● the polymerization flow improver, it has and is used to improve and the suitable groups compound of stable towing resistance, can be used for improving dissolving power and versatility and chemical compatibility.
A remarkable aspect of the present invention is to use the chemically treated immersion/well time that is used for of remarkable minimizing that a large amount of solid deposits and obstruction pipeline are carried out useful removing and rectification.For example, use present method, soak cycle can reduce to 4～8 hours from 24～72 hours.
The low alkyl group glycol ethers can be used as the viscosity of permeate agent adding with the minimizing mixture, and/or can be used as coupling agent to increase the effect for hydrophilic dirt.The embodiment of useful low alkyl group glycol ethers comprises dipropylene glycol monomethyl ether in this composition; The tripropylene glycol monomethyl ether; The methyl of ethylene glycol and Diethylene Glycol, ethyl, propyl group and butyl ether are as ethylene glycol monobutyl ether; Or their mixture.
In composition, may there be polyoxyalkylene diols ether (polyxyalkylene glycolether).Actual amount depends on the dirt kind that exists in the equipment of preparing cleaning and depends on the well of preparation cleaning or the water content in the equipment.Preferred polyglycol ether and the polypropylene glycol ether that use with following formula:
R-O-(C
2H
4O)
xH and R-O-(C
3H
6O)
xH
Wherein in each formula, R is C
1～C
8Alkyl, and X is greater than 4.R preferable methyl, ethyl, propyl group or butyl.More preferably, polyoxyalkylene diols ether is the n-butoxy poly alkane glycol ether.Obtainable commercial polyoxyalkylene diols ether preparation comprises PPG Mazer, Gurnee, Macol 300, Macol 660, WSL-2000, WSL-3520 and WSL-5100 that Ill produces.Polyoxyalkylene diols ether preferably has about 200～600 molecular weight and have the viscosity of about 15～150cps under 25 ℃ when the Brookfield LVT viscometer that uses No. 2 axles with 60r.p.m is measured.
Composition can contain antioxidant.Be applicable to that antioxidant of the present invention comprises (but not being limited to) (BHT) 2,6-Di-Tert-Butyl-P-Cresol, (BHA) 2,6-two-tert-butyl-right-methyl-phenoxide, Eastman inhibitor OABM-oxalyl two (benzylidiene hydrazide) and Eastman DTBMA 2,6-two-tert-butyl quinhydrones.Tensio-active agent adds by effective amount as wetting agent and emulsifying agent use.
Commercial tensio-active agent comprises the EXXATE series of surfactants that obtains from EXXON.EXXATE1000 is C
9-C
11Prop up the acetic ester that shape contains oxygen alcohol.DBE (Du Pont) is the mixture of the dimethyl succinate of the dimethyl adipate of Methyl glutarate, 10-25 weight % of 45-75 weight % and 15-30 weight %.
When needing for special applications, as for the perviousness that increases mixture, reduce the viscosity of mixture, as being used at the coupling agent of mixture immiscible solvent and being provided for oleophylic and during the solvent of hydrophilic dirt, can adding other additive.The additive types and the consumption that need for special the application are within those of ordinary skills' ability.
The invention still further relates to a kind of method, it is by cleaning combination being injected in oil well and this device, from the G﹠O well; Carry the hydrocarbon structure; And remove and prevent gathering of paraffin, other relevant dirt and dirt in exploitation, pumping, storage and the handling equipment.
The dirt that accumulates in Sweet natural gas and oil well and the processing unit has many kinds, as paraffin, tar byproduct, and other sticking dirt.In addition, the dirt that gathers in this well and equipment is a problem.Dirt normally (but being not restricted to) is the accumulation of tosca thing and/or ferric oxide and other hard residual material.The present composition can be cleared up many kinds dirt and the dirt relevant with oil-gas mining and technology effectively, thereby has improved production practice.
The oil gas treatment facility comprises with oil-gas mining and handles all the relevant models and the equipment of kind, for example, and the sleeve pipe of oil gas well, pump, pipeline, lining, storage tank or the like.Expect that this composition can use for all such equipment.
The dirt that composition realization according to the present invention is cleared up or prevented to gather in oil gas well and equipment and/or the method for dirt have several enforcement approach.
Except that clear well and relevant device, often wish composition to be input on every side in the stratigraphic structure by the eyelet in sleeve pipe.Can be pressed into composition on every side in the stratigraphic structure by exerting pressure, or if composition allows to be placed on the telescopic bottom, then composition can not penetrate in the stratigraphic structure under having additional pressure.Composition is penetrated in the stratigraphic structure, and dissolves the obturator in this stratigraphic structure, thereby more efficient oil-gas mining is provided.
Cleaning and the method for keeping the recovery well that comprises peripherally layer structure comprise the sleeve pipe side (back lining) along well topple over or inject composition and make composition with already in the fluid blended step of well.When having enough liquid, composition circulated about 24～72 hours by pump, preferred 48～72 hours.For example, before circulation, composition was placed 8～24 hours.Storage period, cycling time and dosage depend on dirt and/or the quantity of dirt and the degree of depth of well that prediction exists.Basic predose can be the composition of (but being not restricted to) 20 gallons, and for keeping cleaning structure, for example per two weeks, every month, whenever bimonthly on periodic basis, every mouthful of composition that well is about at least 5 gallons.
Composition also can directly be applied in the equipment.For example, rod and sleeve pipe are put into before gas and/or the oil well, these members can spray this composition, or member can be immersed in the storage tank that is full of composition, with the erosion that prevents dirt and dirt with gather.
Composition can be input in gas on the coastal waters or the oil well to reduce dirt, especially paraffin or attached to the dirt in oil well casing and the transfer line by syringe pump.Except that the problem relevant with land oil well, the well on the coastal waters has other problem, and promptly ocean water or seawater can play the pipeline between seabed and the platform and the refrigerant of content.Therefore the paraffin build problem of offshore field is especially serious.For processing pipeline, for example, the composition of 40-50 gallon is splashed in the pipeline.
Being used for clear well, stratigraphic structure and equipment and/or providing effective tectum to pile up later on and the erosive composition to prevent dirt and dirt on their surface of significant quantity can be provided the composition that is used for the method for invention that requires.
The embodiment of this composition comprises:
Composition
W/W% and scope
C10-C15 aromatic series 200ND 40.0
(flash-point 200F; Naphthalene＜0.04; The 10-70 of toluene＜20-0ppm)
C12-C15 aliphatics petroleum distillate 30.0
Different, ring paraffin high flash point light oil (naptha) 10-55
Common and the cyclic paraffins light oil 5.0 of C11-C16
1-8
C8-C18 fatty acid methyl ester 7.0
2-20
DPnB dipropylene glycol n-butyl ether 5.0
1-10
EDTA ethylenediamine tetraacetic acid (EDTA) 1.0
Ao He ﹠amp; Moistening 0.1-2.0
Xylyl sodium sulfonate (40-45%) 1.0
0.1-2.0
C-21 dibasic lipid acid, sylvite 1.0
0.1-2.0
TEA trolamine 0.70
0.1-1.5
D-limonene 1.0
0.1-1.5
Nonyl phenol, 9-mole ethoxylate (tensio-active agent) 1.0
0.1-1.5
N-methyl 2-Pyrrolidone (permeate agent) 6.50
1.0-10.0
Second embodiment is as follows:
| Composition and description | W/W％ | Scope | C-chain and chemistry |
| 150 of aromatic series 150ND (discarded naphthalene) flash-points | 60 | 15-75 | C-10-C-15 |
| HT 142 light oil flash-point＜150 aliphatics gasoline distillation thing *(different and ring paraffin) | 30.5 | 10-60 | C-12-C-15 |
| The positive tallow alkyl trimethylene of amine dioleate (corrosion inhibitor) | 0-25 | 1-25 | |
| OFR-OZ OIL FRICTION REDUCER high molecular aggregates into film | 2.0 | 1-10 | |
| KH-30 adds a spot of tensio-active agent chelating and glycol coupler | 5.0 | 1-20 | C-1 Synolac C8-C18F.A. ester |
| Surfynol 440 | 0.25 | 1-2.5 |
The dirt relevant with oil treatment equipment has many kinds, as oils, paraffin, sulphur, tar byproduct, and other sticking dirt.Composition of the present invention can be removed the dirt of exploiting and handle relevant all kinds with oil effectively.
Oil treatment equipment comprises and recovers the oil and handle all kinds of relevant equipment, for example, and Oil well rig, oil well casing, pump, conduit, pipeline or the like.This compositions contemplated can be used for all these equipment.
Can obtain to be used to remove oils, paraffin, the method that reaches other relevant dirt and the top coat of oil treatment equipment together.That is to say that equipment can clean and handle simultaneously.The composition that uses comprises the composition of significant quantity in the method for the invention that requires, this composition energy cleaning equipment and/or provide effective processing with the inhibition buildup of solids.
For special applications, as be used for changing the VOC level, increase mixture perviousness, reduce the viscosity of mixture, as at the coupler of the insoluble solvent of mixture and be provided for oleophylic and the solvent of hydrophilic dirt, can add the additive that is up to 50 weight % with the need.Suitable additive comprises terpenes, terpenol, C
8-C
14Alcohol ester mixture, ethylene glycol, glycol ether, acid esters, two acid esters, petroleum hydrocarbon, amino acid, alkanolamine and amine, preferred, C
4-C
6The methyl of binary aliphatic ester or isobutyl and just-methyl-2 pyrrolidone.
Terpenic example comprises d-limonene, α and beta pinene and the terpenol that comprises terpinol.C
8-C
14The alcohol ester mixture comprises the EXXATE 900,1000,1200 from Exxon Chemical; Ethylene glycol comprises propylene glycol, dipropylene glycol and tripropylene glycol; And glycol ether comprises dipropylene glycol monomethyl ether, propylene glycol monomethyl ether, propylene glycol-n-butyl ether, ethylene glycol monobutyl ether and diethylene glycol monobutyl ether.Acid esters comprises Witconol 2301 and methyl linoleate, and two acid esters comprise the methyl or the butyl diester of pentanedioic acid, hexanodioic acid and Succinic Acid.Petroleum hydrocarbon comprises AROMATIC 100, AROMATIC 150 ISOPAR M and ISOPAR K.
Such as morpholine, 1,3-dimethyl-2-imidazolone, 1,3-propylene diamine, 2-amino-1, amine of ammediol and 3-aminopropanol and so on and the alkanolamine such as trolamine, diethanolamine, 2-aminomethyl propanol and monoethanolamine are as being used for the dispersion agent of dirt and making lipid acid and the oils dissolving.Amino acid provides nontoxic monoethanolamine alternative, and as metal chelator.C
4-C
6The methyl of binary aliphatic ester or isobutyl and n-methyl-2 pyrrolidone are useful too.
Can use other additive that uses usually in cleaning combination, comprise water-softening agent, sequestrant, sanitas and antioxidant, these additives all add with the amount that effectively shows their required functions.These additives and consumption thereof all are well known to those skilled in the art.Suitable water-softening chemicals comprises linear phosphoric acid salt, styrene-maleic acid copolymer and polyacrylic ester.Suitable sequestrant comprises 1,3-dimethyl 2-imidazolone, 1-phenyl-3-different heptyl-1,3-propanedione and 2 hydroxyls-5-nonylacetophenone oxime.The example of sanitas comprises 2-aminomethyl propanol, diethylethanolamine benzotriazole and Methylbenzotriazole.Be applicable to that antioxidant of the present invention comprises (BHT) 2,6-two-tertiary butyl-p-Cresol, (BHA) 2,6-two-tertiary butyl-right-methyl-phenoxide, Eastman inhibitor O A BM-oxalyl two (benzylidiene hydrazide) and Eastman DTBMA 2,5-two-tert-butyl quinhydrones.
For making the finished product obtain flash-point greater than 200, all additives all should have the flash-point greater than 100, are preferably greater than 150 °F, more preferably 195 TCC.
The usually conduct of well need be pumped into cleaning combination in the casing before pumping diesel oil or lease oil.Crude oil and composition can by arbitrary suitable means mix and this mixture circulation several hrs so that paraffin-asphaltene deposits thing is lax.
Embodiment
Following component is mixed and is used for test.
Weight %
Aromatic series 200ND 40.0
Exxol D-95 30.0
Isopar M 5.0
Soybean methyl ester 7.0
Dipropylene glycol n-butyl ether 5.0
Ethylenediamine tetraacetic acid (EDTA) 1.0
Xylyl sulfonic acid (suffinate) sodium (40%) 1.0
Tolyl-triazole (Tolytriazole) 0.5
Trolamine 0.7
Butylated hydroxytoluene (Tolene) 0.3
D. limonene (limonine) 2.0
Nonyl phenol 9 mole ethoxylates 1.0
Other application includes but is not limited to oil-piping, flow line, basin and undersurface underwater line.
The common sample of paraffin (obstruction well) is with following subitem analysis:
Resinene and the appropriateness paraffin 32.66%
2. bituminous matter 13.53%
3. volatile matter 26.54%
4. dirt and mineral substance 26.57%
In the screw-cap wide-necked bottle of 250ml, put into 5 gram paraffin bituminous matter pastes, sample and add the 100ml said composition.Cover screw-cap, wide-necked bottle stirred 1 minute.Mix when finishing, check this wide-necked bottle, find that paraffin/bituminous matter mixture disperses fully.
In second embodiment, the applicant finds for example to add to aggregate into film such as OFR-2, can cause composition to reduce the friction pressure of crude oil in passing through the turbulent flow of pipeline effectively, and described pipeline is used to keep the primary laminar flow.The result can realize the productivity that flow velocity increases and energy expenditure reduces.
Laboratory test is carried out as follows on the loop test instrument: insert the significantly reduced obstruction pipeline of resistance, alkaline liquid is carried out or do not carry out under the chemically treated situation with the 0.50%-2.0% dosage range, measure pressure reduction.
In the same dose level of 0.5%-2.0%, change, to obtain the remarkable reduction of heavy crude viscosity by the rheology of measuring on the Brookfield viscometer.
On carbon steel and relevant structured material, detect paraffin and the bituminous matter that storage life increases, can detect their obvious improvement on the protection barrier film for the two.
The prescription of second some example of embodiment is as follows:
Prescription
Compound ingredient w w%
Example 1
Aromatic series ND-200 93.0
KH-30 5.0
OFR-2 2.0
Altogether 100.0
Embodiment 2
Exsol D110 45
Aromatic series 200 45
KH-30 8
OFR-2 2
Altogether 100.0
KH-30 comprises C
8-C
18Lipid acid C
1-C
4Alkyl ester, alkyl diol ether and optional polyoxyalkylene glycol ether.
Though particular embodiment of the present invention is described and illustrates, be construed as and the invention is not restricted to this, but those of ordinary skill in the art can improve.Therefore the application requires any and all improvement within the spirit and scope disclosed and that require in invention herein.
Claims (13)
1. composition, it is used for removing paraffin, heavy bitumen matter, oils and other dirt from oil well and oil treatment equipment, and described composition comprises about 1～50% C
10-C
15The discarded aromatic solvent mixture of naphthalene and be up to other additive of 10-50%, described solvent mixture contain less than 1% naphthalene with less than the toluene of 50ppm, and described solvent mixture has about 100 ° flash-point.
2. composition as claimed in claim 1, wherein said additive comprises the fatty acid alkyl ester mixture.
3. composition as claimed in claim 1 also comprises up to 20% or still less alkyl diol ether.
4. composition as claimed in claim 3, wherein the low alkyl group glycol ethers is dipropylene glycol n-butyl ether, dipropylene glycol monomethyl ether, tripropylene glycol monomethyl ether, propylene glycol n-butyl ether or their mixture.
5. composition as claimed in claim 1, also comprise up to 20 weight % from by terpenes, terpenol, acetic acid C
8-C
14At least a additive of selecting in the group that alcohol ester mixture, glycol, two acid esters and n-N-methyl-2-2-pyrrolidone N-are formed.
6. composition as claimed in claim 1 also comprises the tensio-active agent up to 10%.
7. composition as claimed in claim 6, wherein said tensio-active agent is selected from the group that the alkyl alcohol amine salt of Nonyl Phenol ethoxylated, straight chain alcohol ethoxy compound and Witco 1298 Soft Acid is formed.
8. composition as claimed in claim 1, comprising from the described additive of following kind so that help the life-span and performance, described additive comprises (but being not limited to) sequestrant such as EDTA coupler and for example sodium xylene sulfonate, sanitas such as methylbenzothiazole, antioxidant such as Yoshinox BHT.
9. as each described composition in the claim 1～8, also comprise the film that aggregates into such as OFR-2.
10. as each described composition in the claim 1～9, wherein said aromatic solvent mixture has the flash-point more than 150.
11. as each described composition in the claim 1～9, wherein said aromatic solvent mixture has the flash-point more than 200.
12. method, it is used for from gas or oil well, carry the hydrocarbon stratigraphic structure, remove in perhaps exploitation, pumping, storage or the transmission equipment and prevent that gathering of paraffin, tar, heavy oil, lime carbonate, ferriferous oxide and other dirt and dirt, described method from comprising that each described composition in the claim 1～11 is incorporated in described well, stratigraphic structure or the equipment.
13. method, it is used for from gas or oil well, carry the hydrocarbon stratigraphic structure, remove in perhaps exploitation, pumping, storage or the transmission equipment and prevent that accumulation, described method from comprising that each described composition in the claim 1～11 is incorporated in described well, stratigraphic structure or the equipment.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US41991302P | 2002-10-21 | 2002-10-21 | |
| US60/419,913 | 2002-10-21 | ||
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| CN102242028A (en) * | 2011-05-20 | 2011-11-16 | 浙江浙能能源技术有限公司 | Neutral detergent and application of neutral detergent in cleaning hard scale of gas-gas heater (GGH) |
| CN102965206A (en) * | 2012-11-13 | 2013-03-13 | 山东泰德新能源有限公司 | Engine carbon deposition cleaning agent and preparation method thereof |
| CN103773627A (en) * | 2012-10-23 | 2014-05-07 | 中国石油化工股份有限公司 | Solution for cleaning polylactic acid polymerization reaction device and cleaning method |
| CN104152290A (en) * | 2014-08-01 | 2014-11-19 | 无棣华信石油技术服务有限公司 | Cleaning agent for thickened oil conveying pipelines and preparation method thereof |
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| CN102242028A (en) * | 2011-05-20 | 2011-11-16 | 浙江浙能能源技术有限公司 | Neutral detergent and application of neutral detergent in cleaning hard scale of gas-gas heater (GGH) |
| CN102242028B (en) * | 2011-05-20 | 2012-11-07 | 浙江浙能能源技术有限公司 | Neutral detergent and application of neutral detergent in cleaning hard scale of gas-gas heater (GGH) |
| CN103773627A (en) * | 2012-10-23 | 2014-05-07 | 中国石油化工股份有限公司 | Solution for cleaning polylactic acid polymerization reaction device and cleaning method |
| CN103773627B (en) * | 2012-10-23 | 2016-02-24 | 中国石油化工股份有限公司 | A kind of solution and purging method cleaning poly lactic acid polymerized reaction unit |
| CN102965206A (en) * | 2012-11-13 | 2013-03-13 | 山东泰德新能源有限公司 | Engine carbon deposition cleaning agent and preparation method thereof |
| CN102965206B (en) * | 2012-11-13 | 2015-03-25 | 山东泰德新能源有限公司 | Engine carbon deposition cleaning agent and preparation method thereof |
| CN104152290A (en) * | 2014-08-01 | 2014-11-19 | 无棣华信石油技术服务有限公司 | Cleaning agent for thickened oil conveying pipelines and preparation method thereof |
| CN104293504A (en) * | 2014-09-24 | 2015-01-21 | 中国海洋石油总公司 | Descaling cleaning agent for poly-containing dirt on polymer flooding produced liquid treatment equipment |
| CN104263533A (en) * | 2014-10-02 | 2015-01-07 | 济南瑞东实业有限公司 | Cleaning agent for organic sediments inside oil tank and preparation method of cleaning agent |
| JP2019523343A (en) * | 2016-06-30 | 2019-08-22 | ユナイテッド ラボラトリーズ インターナショナル， エルエルシー | Solvent composition and process for removing asphalt and other contaminants |
| JP7007353B2 (en) | 2016-06-30 | 2022-01-24 | ユナイテッド ラボラトリーズ インターナショナル， エルエルシー | Process for removing solvent composition, asphalt and other contaminants |
| CN111545530A (en) * | 2020-05-14 | 2020-08-18 | 北京乐文科技发展有限公司 | Oil refining device shutdown oil removal cleaning method |
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