CN105298458B - A kind of method that poly- drive produced well sucker rod downlink lag releases - Google Patents
A kind of method that poly- drive produced well sucker rod downlink lag releases Download PDFInfo
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Abstract
The present invention relates to a kind of method that poly- drive produced well sucker rod downlink lag releases, the method that this poly- drive produced well sucker rod downlink lag releases：Into the rod-pumped well normally produced, by the way of well head drop dosing, polyepichlorohydrin amine is added, oxidant, corrosion inhibiter, scale remover, wherein, the addition of polyepichlorohydrin amine is the 0.5% ~ 0.8% of rod-pumped well Produced Liquid quality, the addition of oxidant is the 0.3% ~ 0.7% of rod-pumped well Produced Liquid quality, the addition of corrosion inhibiter is the 0.1% of rod-pumped well Produced Liquid quality, the addition of scale remover is the 2% ~ 4% of rod-pumped well Produced Liquid quality, polyepichlorohydrin amine forms the association colloid solution of ultra-low viscosity with the polyacrylamide in Produced Liquid, so that Produced Liquid is easy to be plucked out of the ground.Polyepichlorohydrin amine forms the association colloid solution of ultra-low viscosity with the polyacrylamide in Produced Liquid in the present invention so that Produced Liquid is easy to be plucked out of the ground, and solves the problems, such as that poly- drive pumping unit downlink lag, degradation expense are low.
Description
Technical field
The present invention relates to technical field of oil production engineering polymer displacement oil well Produced Liquid viscosity reduction technical finesses, and in particular to poly- drive of one kind is adopted
Go out the method that well sucker rod downlink lag releases.
Background technology
Polymer flooding has achieved good oil displacement efficiency since oil industryization is applied, and keeps high yield steady in oil field
Production has certain positive effect, economic and social benefit notable.But from 2000, there is bar not successively in polymer flooding pump wells
It goes into the well phenomenon.Compared with water drive, gather and drive that produced liquid in oil well property is complicated, producing well see it is poly- after pumping unit maximum polished rod load compared with
Water drive increase and minimum polished rod load compared with water drive when reduce, sucker rod friction in down stroke increases, and lower part sucker rod is increased by compressive load
Greatly, when load is more than rod string critical bends load, unstability bending will occur for sucker rod, generate rod and tube partial-wear, seriously
Will make rod parting, oil pipe grinding leakage.In addition, since polymer produced fluid viscosity is big, fluid is caused to increase into pump resistance,
Especially to the pumpingh well of low submergence, fluid supply capacity difference, during upstroke, highly viscous fluid is slow into pump speed, pump plunger
Speed uplink is more than fluid into pump speed so that at the end of upstroke, has little time to concede space, column full of plunger into pump liquid
Plug cannot unload in time before hitting liquid level during downlink, and it is excessive to will also result in sucker rod friction in down stroke.It is disconnected so as to cause bar
Rate increases, and operation safeguards that well number obviously increases, and influences poly- drive oil well production, and pump detection period greatly shortens, and operating cost increases,
So that cost for oil production increases.
Oil field is directed to this problem, has carried out a large amount of experimental study, it was initially believed that increasing with polymer concentration in Produced Liquid
Add, extraction fluid viscosity increases, and rod string friction in down stroke is caused to increase, and is also easy to produce unstability bending or eccentric wear.In this regard, can take
Measure have very much, the researchs such as Xu Jiajun are thought, one use sucker rod base-weighted technology, so that neutral point is moved down, under increase
Action edge；Secondly renwing stratum pressure, keeps stratum energy to go up；Thirdly using Novel sucker rod, oil well pump technology, these sides
Method has certain effect to the reduction of sucker rod resistance, but cannot solve the problems, such as this from the root cause.Studies in China is main at present
Start in terms of two：(1) polymer-bearing produced fluid is non-newtonian fluid, especially shows viscoplasticity increase at high shear rates
The viscosity of Produced Liquid so that resistance that resistance, fluid in polymer displacement oil well down stroke between oil pump plunger piston and bushing pass through travelling valve
Power be much larger than water drive well resistance, Zhu Jun, Han Hongsheng, Zhao Zi just etc. all this is simply analyzed from this angle, but
The emphasis of their work is mainly the force analysis of sucker rod, and the elasticity research to Produced Liquid is simultaneously insufficient.(2) normal direction masterpiece
With.Wu Xiaodong etc. think body containing conflux in oil well there are normal force be also cause sucker rod not under reason, Han Hongsheng and king
The moral people etc. are testing experiments prove that poly- drive the power for being implicitly present in machine-pumped oil well along sucker rod and being acted on side on bar
In determine normal force of the different polymer concentrations under the different degree of eccentricitys, but without to the calculation formula contributed.Willow people etc.
Following satellite Maxwell models calculate inner tube in an axial direction with fluid matasomatism when constant speed movement in the radial direction on sucker rod
Power, but they calculate be stable state when the case where, do not account for influence to it when sucker rod moves back and forth.
The common method for solving the poly- drive pumping unit extraction well sucker rod downlink lag in oil field at present has：First, using periodically heat
Technology is washed, the method for hot wash mainly uses hot water (70 DEG C or so), by rod-pumped well annular space injection well bottom, with Produced Liquid
It is produced together by oil pipe, principle is mainly the temperature by improving Produced Liquid, reduces extraction fluid viscosity to reach, takes into account simultaneously
Clean near wellbore zone wax, gum asphalt；Main effect is molten to reduce polymer in poly- flooding produced liquid by increasing temperature
The viscosity of liquid；The phenomenon that reducing sucker rod downlink lag to reach.But reducing extraction fluid viscosity by the method that hot wash heats is
Limited, 3-5 days extraction fluid viscosities can also restore original state after stopping hot wash.Second is that oxidative degradation technology, by well-flushing
Oxidant is added in the process, is reacted with oxidizable species such as polymer, crude oil in Produced Liquid in shaft bottom, the main needle of oxidant
To the polyacrylamide in Produced Liquid, to achieve the purpose that reduce extraction fluid viscosity；Oxidation degradation method specific heat washing method effect
Obviously, but there is also problems.Cost is higher than hot wash, since most of oxidants all have the metals such as oil pipe and casing
Corrosivity, so in carrying out oxidative degradation operating process, first, needing to be oxidized agent concentration wants high, while corroding in order to prevent
Occur, corrosion inhibiter is added toward contact；Cost is higher.And oxidation product can also bring some troubles to follow-up water-oil separating.
The shortcomings that prior art：Prior art cost is higher, needs heavy duty work equipment, such as tank car, high pressure pump truck；
Inefficiency, general polymer displacement oil well hot washing period 1 ~ 2 week simultaneously need operation 25 ~ 30 times or so, each hot wash to need over a year
10 tons 1 ~ 2, tank car, high pressure pump truck 1,6 ~ 10 people of operating personnel or so.10 tons of hot water are needed per subjob；If it is oxidation
Degradation technique is also additionally required 10 tons of water and the inorganic agents such as oxidant is injected underground.
Invention content
The purpose of the present invention is a kind of method that poly- drive produced well sucker rod downlink lag releases, this poly- drive produced well is taken out
The method that beam hanger downlink lag releases is used to solve generally to use costly, period present in hot wash and oxidative degradation short at present
The problem of.
The technical solution adopted by the present invention to solve the technical problems is：This poly- drive produced well sucker rod downlink lag solution
The method removed：Into the rod-pumped well normally produced, by the way of well head drop dosing, polyepichlorohydrin amine, oxygen is added
Agent, corrosion inhibiter, scale remover, wherein the addition of polyepichlorohydrin amine be rod-pumped well Produced Liquid quality 0.5% ~
0.8%, the addition of oxidant is the 0.3% ~ 0.7% of rod-pumped well Produced Liquid quality, and the addition of corrosion inhibiter is adopted for rod-pumped well
Go out the 0.1% of liquid quality, the addition of scale remover is the 2% ~ 4% of rod-pumped well Produced Liquid quality, polyepichlorohydrin amine and extraction
Polyacrylamide in liquid forms the association colloid solution of ultra-low viscosity so that Produced Liquid is easy to be plucked out of the ground.
A kind of method that poly- drive produced well sucker rod downlink lag releases：By polyepichlorohydrin amine, oxidant, inhibition
Agent, scale remover, water are mixed to form mixed solution, and the mass percent concentration of polyepichlorohydrin amine is 0.5% ~ 0.8% after mixing,
The mass percent concentration of oxidant is 0.3% ~ 0.7%, and the mass percent concentration of corrosion inhibiter is 0.1%, the quality hundred of scale remover
It is 2% ~ 4% to divide specific concentration, and the amount of aqueous solvent is 94.4 ~ 97.2%；For lagging serious or stopping the rod-pumped well taken out, in well-flushing mistake
Cheng Zhong, by rod-pumped well annular space by mixed solution injection well bottom, in shaft bottom, oxidant first with poly- third from stratum
Acrylamide acts on, the polyacrylamide in stratum by the oxidizing polyacrylamide or carbon dioxide smaller at molecular weight and
Water, polyepichlorohydrin amine form the association colloid solution of ultra-low viscosity with the polyacrylamide after oxidative degradation in Produced Liquid；
So that Produced Liquid and the mixed solution of injection are easy to be plucked out of the ground.
The preparation method of polyepichlorohydrin amine in said program：
It is prepared using the four-hole bottle with stirring and reflux condenser, dimethylamine is first added into four-hole bottle by metering, opens
Dynamic blender, it is cooling in ice water bath, so that dimethylamine is cooled to 10 DEG C or less；The cooling water for opening reflux condenser, is being stirred
In the case of mixing, with separatory funnel dropwise addition epoxychloropropane, the molar ratio of epoxychloropropane and dimethylamine is 1:1, make reactor
Interior temperature is controlled at 10~20 DEG C, adds crosslinking agent diethylenetriamine after being added dropwise, entire time for adding about 2h, then
Temperature is controlled at 60~75 DEG C, 5~7h is reacted, obtains polyepichlorohydrin amine solution；Polyepichlorohydrin amine solution is used
Absolute ethyl alcohol purifies, and sediment is dried in vacuo for 24 hours at 65 DEG C, obtains polyepichlorohydrin amine solid, make by this method
Standby polyepichlorohydrin amine cationic degree is big, and molecular weight is big, and the association glue of ultra-low viscosity is more readily formed with polyacrylamide
Liquid solution.
Oxidant is SODIUM PERCARBONATE in said program, and corrosion inhibiter is methenamine, and scale remover is sulfamic acid.
Polyacrylamide amine content is 0 ~ 800mg/L, wax content 25 ~ 35% in rod-pumped well Produced Liquid in said program.
The addition of polyepichlorohydrin amine is the 0.6% ~ 0.8% of rod-pumped well Produced Liquid quality in said program, at this time
50% or more is reached to crude oil wax-proofing rate, since Daqing oil field polymer displacement oil well moisture content is higher, water-soluble poly epichlorohydrin amine
(EPI-DMA) it may make wax crystalline substance wettability of the surface to change, new wax crystalline substance prevented to deposit and assemble, so having centainly
Wax control result.
The invention has the advantages that：
1, the polyacrylamide in the present invention in polyepichlorohydrin amine and Produced Liquid forms the association colloid of ultra-low viscosity
Solution so that Produced Liquid is easy to be plucked out of the ground, and solves the problems, such as poly- drive pumping unit downlink lag, degradation expense is low, week
Phase is long.
2, viscosity break ratio of the present invention is up to 87.5%, and wax control result is good, and stability is preferable, and viscosity break ratio still can reach 86% after 10h.
Description of the drawings：
Fig. 1 is EPI-DMA and Na in the present invention2CO4Act synergistically HPAM curve graphs；
Fig. 2 is each component of the present invention synergistic effect viscosity reduction experiment；
Fig. 3 is ageing time viscosity reducing effect figure of the present invention.
Specific implementation mode
The present invention is further illustrated below：
Embodiment 1：
The method that this poly- drive produced well sucker rod downlink lag releases：Into the rod-pumped well normally produced, using well
The mode of mouth drop dosing, is added polyepichlorohydrin amine, sodium carbonate, methenamine, sulfamic acid, wherein poly- epoxy chloropropionate
The addition of alkanamine is the 0.5% ~ 0.8% of rod-pumped well Produced Liquid quality, and the addition of sodium carbonate is rod-pumped well Produced Liquid matter
The 0.3% ~ 0.7% of amount, the addition of methenamine are the 0.1% of rod-pumped well Produced Liquid quality, and the addition of sulfamic acid is to take out
The 2% ~ 4% of oil machine well Produced Liquid quality, polyepichlorohydrin amine form forming for ultra-low viscosity with the polyacrylamide in Produced Liquid
Close colloidal solution；So that Produced Liquid is easy to be plucked out of the ground.
5 mouthfuls of well field tests have been carried out in the 6th oil recovery factory's secret of Daqing Oil Field Co., Ltd using the present embodiment,
Experiment achieves apparent effect.Achieve preferable economic benefit.Field application formula is as follows：
Each dosages distribution of the different well present invention of table 1
Note：Selected test well salinity range in table：3500~5500mg/L.
Embodiment 2：
The method that this poly- drive produced well sucker rod downlink lag releases：By polyepichlorohydrin amine, SODIUM PERCARBONATE, Wu Luo
Tropine, sulfamic acid, water are mixed to form mixed solution, after mixing the mass percent concentration of polyepichlorohydrin amine be 0.5% ~
0.8%, the mass percent concentration of SODIUM PERCARBONATE is 0.3% ~ 0.7%, and the mass percent concentration of methenamine is 0.1%, amino
The mass percent concentration of sulfonic acid is 2% ~ 4%, and the amount of aqueous solvent is 94.4 ~ 97.2%；For lagging pumping unit that is serious or stopping pumping
Well, in washing well process, by rod-pumped well annular space by mixed solution injection well bottom, in shaft bottom oxidant first with from
The polyacrylamide on stratum acts on, the polyacrylamide in stratum by the oxidizing polyacrylamide smaller at molecular weight or
Carbon dioxide and water, polyepichlorohydrin amine form the association of ultra-low viscosity with the polyacrylamide after oxidative degradation in Produced Liquid
Colloidal solution；So that Produced Liquid and the mixed solution of injection are easy to be plucked out of the ground.
The preparation method of polyepichlorohydrin amine in the present invention：
The preparation of different molecular weight polyepichlorohydrin amine thinner, the present invention are mainly with epoxychloropropane and dimethylamine
Comonomer prepares target product under the catalytic action of sodium sulfite and sodium hydrogensulfite by polycondensation reaction；
It reacts and is carried out in the four-hole bottle with stirring and reflux condenser, diformazan is first added into four-hole bottle by metering
Amine starts blender, cooling in ice water bath, and dimethylamine is made to cool to 10 DEG C or less；The cooling water of reflux condenser is opened,
In the case of stirring, epoxychloropropane is added dropwise with separatory funnel, the molar ratio of epoxychloropropane and dimethylamine is 1：1.Because anti-
It should be very exothermic, strictly to control rate of addition, while reinforce cooling down, the temperature in reactor is made to control 10~20
℃.Adding crosslinking agent diethylenetriamine after being added dropwise, entire time for adding about 2h, then thermostatic control is at 60~75 DEG C,
React 5~7h, the product synthesized.
The product of synthesis is purified with absolute ethyl alcohol, sediment is dried in vacuo for 24 hours at 65 DEG C, obtains Hydrin
Amine solid product, because there is stronger water imbibition, product should be stored in drier.
State is as shown in table 2 after viscosity, viscosity break ratio and oil mixing with water under different oil-water ratios for polyepichlorohydrin amine：
Viscosity reduction efficiency of 2 polyepichlorohydrin amine of table under different oil-water ratios
By 2 measurement result of table it is found that when 0.1% polyepichlorohydrin amine is added, oil-water mixture does not disperse, but still
Certain viscosity reduction ability is embodied；When activating agent is 0.4%, oil-water ratio 7:When 3, water-oil emulsion part has disperseed, and
Oil-water ratio is 4:When 6, oil droplet has been dispersed into fine particles substantially, viscosity break ratio nearly 80%, and when surfactant concentration is 0.8%, it mixes
It closes oil in liquid and basically forms evenly dispersed tiny oily foam, viscosity break ratio is up to 87.5%.According to extraction well oil content when the injection of scene
Inject polyepichlorohydrin amine concentration appropriate.
Polyepichlorohydrin amine acts synergistically with oxidant：
Polyepichlorohydrin amine solution (EPI-DMA) is faint yellow viscous liquid, and cationic degree is higher, and molecular weight
It is low, it is soluble easily in water.5% and 10% solution is diluted in volumetric flask.HPAM solution 100mL are taken, by EPI-DMA and oxidant
Na2CO4By 1:2 volume ratio mixing, is added in HPAM solution, surveys its initial viscosity, be placed in 45 DEG C of insulating boxs and stand, often
Every 1 hour record viscosity data, draws table and calculate the variation of viscosity break ratio, EPI-DMA and Na2CO4HPAM act synergistically as schemed
1。
It can be seen that from the variation tendency of viscosity break ratio in figure when EPI-DMA cations are added in system, with oxidant list
Solely effect HPAM is compared, and due to the neutralization of charge, system electrically changes, and the strand of HPAM is rolled up, and causes its apparent viscous
The viscosity of system can be reduced by 90% or more by the reduction of degree, EPI-DMA solution.
Polyepichlorohydrin amine wax control result is tested：
Polyepichlorohydrin amine is a kind of quaternary water-soluble active agent, and the mechanism of action is to change wax deposition surface (oil
Pipe, sucker rod and equipment surface) property and work.Activating agent due to being dissolved in water can be adsorbed on wax deposition surface, make it
Become polar surfaces and have water membrane, unfavorable wax deposits on it.Therefore, activating agent is by changing paraffin surface or wax deposition
The property on surface achievees the purpose that wax control.Inhibiting rate for wax precipitation experimental result is as follows：
Compound concentration is respectively 0.4%, 0.6%, 0.8% polyepichlorohydrin amine and dispersant, and it is real to carry out wax control
It tests, experimental result such as the following table 3.
3 EPI-DMA inhibiting rate for wax precipitation experimental results of table
The EPI-DMA pair five mouthfuls of oil well crude oil inhibiting rate for wax precipitation at a concentration of 0.4% are only 40% hereinafter, and EPI-DMA concentration
When being adjusted to 0.6% or more, crude oil wax-proofing rate is 50% or more, thus selected EPI-DMA dosages 0.6% ~ 0.8% it
Between.Since Daqing oil field polymer displacement oil well moisture content is higher, water-soluble EPI-DMA may make wax crystalline substance wettability of the surface to change
Become, new wax crystalline substance is prevented to deposit and assemble, so having certain wax control result.
Hydrin is to pit shaft erosion test：
50mL solution is prepared according to the ratio of EPI-DMA adjustment, corrosion inhibiter, 2-6 wide-mouth bottles are added without in No. 1 colorimetric cylinder
In be separately added into 0.05%, 0.07%, 0.09%, 0.1%, 0.15% corrosion inhibiter 2mL, processed steel disc is submerged and is hung
In above-mentioned solution.It under the conditions of 45 DEG C, is taken out after 6h, calculates the rate of corrosion of the above-mentioned solution after adjustment.Various concentration inhibition
The addition of agent, the results are shown in Table 4 for EPI-DMA corrosion tests.
The inhibition rating results of various concentration corrosion inhibiter are added in 4 EPI-DMA of table
| Steel disc number | Quality before corrosion, g | Quality after corrosion, g | Loss on acid washing quality, g | Corrosion rate, mm ∕ a |
| 1 | 13.9045 | 13.8907 | 0.0007 | 1.4253 |
| 2 | 13.9346 | 13.9217 | 0.0009 | 1.3685 |
| 3 | 14.3612 | 14.3491 | 0.0008 | 1.2164 |
| 4 | 14.3549 | 14.3485 | 0.0009 | 1.0762 |
| 5 | 13.8743 | 13.8692 | 0.0007 | 0.8429 |
| 6 | 14.3572 | 14.3526 | 0.0008 | 0.7635 |
As can be seen from the table, the corrosion inhibiter of 0.1% concentration is added in EPI-DMA can just be such that corrosion rate reaches
Corrosion rate to requirement is less than 1mm/a.
Each component compatibility test of the present invention：
0.4% SODIUM PERCARBONATE is pressed with oxidant and the synergistic action effect of acid, interior in order to test EPI-DMA in the present invention,
3% sulfamic acid, 0.6%EPI-DMA are prepared, and by it according to 3:5:2 volume ratio mixing, viscosity reduction degradation is carried out to HPAM gels
Experiment, viscosity break ratio change over time experimental result such as Fig. 2, and as seen from Figure 2, above-mentioned component is to HPAM gel viscosity reducing effects
Preferably, especially apparent in preceding 2h effects, after 6h viscosity break ratio up to 90% or more, so, there is good compatibility between each component.
Stability test of the present invention：
The present invention is prepared according to above-mentioned formula, stands aging 2h, 4h, 6h, 8h, 10h respectively, carries out de-plugging experiment, observation
Different ageing time plugging removal effects, the results are shown in Figure 3, as seen from Figure 3, the present invention with ageing time increase viscosity reduction
Rate is declined slightly, but is declined and be not obvious, and viscosity break ratio still can reach 86% after 10h, and therefore, stability of the present invention is preferable.
In order to reduce sucker rod friction in down stroke, the disconnected rate of bar is reduced, pump detection period is extended, passes through and analyzes underground lag substance
At being grouped as, study its rheological equationm of state, on this basis to the force-bearing situation of rod string in poly- drive produced well production process into
Row analysis, finds out and causes the excessive true cause of sucker rod resistance.According to analysis result, the preparation research for carrying out pickling formula carries out
Laboratory test, examines whether the present invention can play the role of viscosity reduction de-plugging, then tests live pumpingh well, to solve to take out
The big problem of beam hanger friction in down stroke.
Claims (5)
1. a kind of method that poly- drive produced well sucker rod downlink lag releases, it is characterised in that：This poly- drive produced well sucker rod
The method that downlink lag releases：Into the rod-pumped well normally produced, by the way of well head drop dosing, polycyclic oxygen chlorine is added
Propane amine, oxidant, corrosion inhibiter, scale remover, wherein the addition of polyepichlorohydrin amine is rod-pumped well Produced Liquid quality
0.5% ~ 0.8%, the addition of oxidant is the 0.3% ~ 0.7% of rod-pumped well Produced Liquid quality, and the addition of corrosion inhibiter is oil pumping
The 0.1% of motor-pumped well Produced Liquid quality, the addition of scale remover are the 2% ~ 4% of rod-pumped well Produced Liquid quality, polyepichlorohydrin amine
The association colloid solution of ultra-low viscosity is formed with the polyacrylamide in Produced Liquid；So that Produced Liquid is easy to be plucked out of the ground.
2. a kind of method that poly- drive produced well sucker rod downlink lag releases, it is characterised in that：This poly- drive produced well sucker rod
The method that downlink lag releases：Polyepichlorohydrin amine, oxidant, corrosion inhibiter, scale remover, water are mixed to form mixed solution,
The mass percent concentration of polyepichlorohydrin amine is 0.5% ~ 0.8% after mixing, the mass percent concentration of oxidant is 0.3% ~
0.7%, the mass percent concentration of corrosion inhibiter is 0.1%, and the mass percent concentration of scale remover is 2% ~ 4%, and surplus is water；For
Lag is serious or stops the rod-pumped well taken out, in washing well process, by rod-pumped well annular space by mixed solution injection well bottom,
In shaft bottom, oxidant is acted on the polyacrylamide from stratum first, the polyacrylamide in stratum by it is oxidizing at
The smaller polyacrylamide of molecular weight or carbon dioxide and water, polyepichlorohydrin amine and poly- third after oxidative degradation in Produced Liquid
Acrylamide forms the association colloid solution of ultra-low viscosity；So that Produced Liquid and the mixed solution of injection are easy to be plucked out of the ground.
3. the method that poly- drive produced well sucker rod downlink lag according to claim 1 or 2 releases, it is characterised in that：Institute
The preparation method for the polyepichlorohydrin amine stated：
It is prepared using the four-hole bottle with stirring and reflux condenser, dimethylamine is first added into four-hole bottle by metering, starts and stirs
Device is mixed, it is cooling in ice water bath, so that dimethylamine is cooled to 10 DEG C or less；The cooling water for opening reflux condenser, in stirring
In the case of, with separatory funnel dropwise addition epoxychloropropane, the molar ratio of epoxychloropropane and dimethylamine is 1:1, make in reactor
Temperature is controlled at 10~20 DEG C, and crosslinking agent diethylenetriamine, entire time for adding 2h, then by temperature are added after being added dropwise
Control reacts 5~7h, obtains polyepichlorohydrin amine aqueous solution at 60~75 DEG C；By polyepichlorohydrin amine aqueous solution nothing
Water-ethanol purifies, and sediment is dried in vacuo for 24 hours at 65 DEG C, obtains polyepichlorohydrin amine solid.
4. the method that poly- drive produced well sucker rod downlink lag according to claim 3 releases, it is characterised in that：Described
Oxidant is SODIUM PERCARBONATE, and corrosion inhibiter is methenamine, and scale remover is sulfamic acid.
5. the method that poly- drive produced well sucker rod downlink lag according to claim 4 releases, it is characterised in that：Described
The addition of polyepichlorohydrin amine is the 0.6% ~ 0.8% of rod-pumped well Produced Liquid quality.
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| CN113372892B (en) * | 2020-03-09 | 2022-08-09 | 中国石油化工股份有限公司 | Chemical paraffin removal agent for oil well, preparation method and application thereof, and paraffin removal method for oil well |
| CN112483045B (en) * | 2020-12-01 | 2023-04-07 | 中国石油天然气股份有限公司 | Method for guiding oil well to add chemicals by using oil well indicator diagram data |
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