CN106496408B - Drilling fluid flow pattern regulator and preparation method thereof - Google Patents
Drilling fluid flow pattern regulator and preparation method thereof Download PDFInfo
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/56—Acrylamide; Methacrylamide
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- C—CHEMISTRY; METALLURGY
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
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- C08F4/00—Polymerisation catalysts
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
- C09K8/035—Organic additives
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
- C09K8/22—Synthetic organic compounds
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- C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
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- C08J2333/26—Homopolymers or copolymers of acrylamide or methacrylamide
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- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
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- C09K2208/34—Lubricant additives
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Abstract
The invention provides a drilling fluid flow pattern regulator and a preparation method thereof, wherein the drilling fluid flow pattern regulator is prepared by copolymerizing acrylamide, acrylate and an organic functional monomer under the action of an initiator and a catalyst, wherein the organic functional monomer is a mixture of 2-acrylamido-2-methylpropanesulfonic acid and acryloyloxyethyl trimethyl ammonium chloride, and the catalyst is a transition metal catalyst; the mass ratio of the acrylamide to the acrylate to the organic functional monomer is 13-15: 2-4: 3-9. The product of the invention has stronger salt, paste and other pollution resistance; the inhibition capability is strong, and the anti-collapse effect is good; the inferior solid phase content is low, the lubricity is good, and the construction requirements of a natural inclined shaft and a directional shaft with a well inclination angle smaller than 20 degrees can be met; the temperature resistance is strong, and the temperature resistance of a salt water drilling fluid system can reach more than 150 ℃.
Description
Technical field
The present invention relates to technical field of chemical product manufacture, and in particular to a kind of drilling fluid flow pattern regulator and its preparation side
Method.
Background technique
In Jianghan Basin is typical inland Faulted Salt Lake Basin formation characteristics: special depositional environment, and stratum salt cream is developed,
The pure salt deposit cumulative thickness of Partial Block is up to 1800 meters or more；Brine is abundant；Geothermal gradient is high；Smectite content is high；Creaming mudstone
Development, water sensitivity are strong；Stratum aquation dispersibility is strong, caving pressure is high.With spies such as inter-salt non-andstone, hyposmosis, depositional traps
The exploitation of different oil reservoir, high angle hole, directional well quantity increase.
According to the special ground of In Jianghan Basin and geological conditions, saturated brine, compound salt water are generally used in drillng operation
Prepared polymer drilling fluid.But with the increase of salt content, electrolyte concentration increases, and the acidity of the aquation group of polymer is got over
It is weak, it goes hydration stronger, inorganic agent is made to fail；Compress the electric double layer of clay particle in drilling fluid simultaneously, hydration shell becomes
It is thin, flocculation is formed between clay particle, leads to the reduction of system solid concentration, viscosity, shear force decline, property of drilling fluid is deteriorated, from
And carrying capacity reduces, and seriously affects bit speed.Therefore, it is the brine drilling liquid system for adapting to Jiang-Han Area characteristic, needs to develop
Can temperature resistance, anti-saturation salt water additive for drilling fluid.
Summary of the invention
The object of the present invention is to provide a kind of drilling fluid flow pattern regulators and preparation method thereof, by organic functions monomer
Middle introducing organic sulfonic acid group and cation group make adjust agent molecule have chain rigidity and space net structure, product have compared with
Strong salt resistance, cream and other pollution capacities, in drilling process, performance is stablized, and is easy to adjust, is able to satisfy the salt water drilling of Jiang-Han Area characteristic
The drillng operation of well liquid system needs.
To achieve the goals above, The technical solution adopted by the invention is as follows:
A kind of drilling fluid flow pattern regulator, by acrylamide, acrylates, organic functions monomer in initiator, catalyst
It is copolymerized under the action of auxiliary agent, the organic functions monomer is 2- acrylamide-2-methylpro panesulfonic acid and acryloyl-oxy
The mixture of ethyl-trimethyl salmiac, the catalyst are transition-metal catalyst.
According to above scheme, the acrylamide, acrylates, organic functions monomer mass ratio be 13~15:2~4:
3~9；The mass ratio of the 2- acrylamide-2-methylpro panesulfonic acid and acrylyl oxy-ethyl-trimethyl salmiac is 2~7:1
~2.
According to above scheme, the acrylamide, acrylates, organic functions monomer mass ratio be 15:2.27~
3.8:3.2~7.86；The mass ratio of the 2- acrylamide-2-methylpro panesulfonic acid and acrylyl oxy-ethyl-trimethyl salmiac
For 2.2~6.53:1~1.33.
According to above scheme, the acrylates is potassium acrylate, and the potassium acrylate is by acrylic acid and potassium hydroxide system
?.
According to above scheme, the initiator is the redox system of ammonium persulfate and high temperature reducing agent composition, institute
Stating auxiliary agent includes urea, foaming agent.
A kind of preparation method of drilling fluid flow pattern regulator, comprising the following steps:
1) by deionized water, acrylamide, acrylic acid, potassium hydroxide, 2- acrylamide-2-methylpro panesulfonic acid, propylene
Acyloxyethyl trimethyl ammonium chloride, urea, catalyst are added in polymerization tank after mixing, and adjusting pH is 6~7；
2) under the protection of nitrogen, confined reaction obtains copolymerization blob of viscose after initiator, foaming agent are added into polymerization tank；
3) copolymerization blob of viscose successively through and rubbing, is dry, crushing, obtain finished product.
According to above scheme, the polymerization tank is the metal polymerization slot with isolation film；The foaming agent is inorganic salts.
According to above scheme, according to the mass fraction, specifically includes the following steps:
1) 3.5~3.8 parts of potassium hydroxide is obtained into potassium hydroxide solution with 10 parts of deionized water dissolving；
2) 2.0~4.0 parts of acrylic acid and 2.0~7.0 parts of 2- acrylamide-2-methylpro panesulfonic acid mixture are thrown
Enter in reactor, to reaction potassium hydroxide solution is wherein added dropwise, after being added dropwise with ammonium hydroxide tune pH be 6~7；
3) 13~15 parts of acrylamide, 1~2 part of acrylyl oxy-ethyl-trimethyl chlorination are put into reactor again
Ammonium, 0.3~0.35 part of urea, 3ppm catalyst, 34 parts of deionized water, after mixing pour into the solution in reactor
In polymerization tank；
4) initiator, 0.50~0.55 part of the foaming agent of 160ppm are added into polymerization tank, it is close under the protection of nitrogen
Copolymerization blob of viscose is obtained after closing 2~3h of reaction；
5) copolymerization blob of viscose is rubbed, the crushed after being dried at 100~120 DEG C obtains finished product.
2- acrylamide-2-methylpro panesulfonic acid in organic functions monomer of the invention contains organic sulfonic acid group, third
Alkene acyloxyethyl trimethyl ammonium chloride contains cation group, and organic sulfonic acid group is insensitive to salt, enhances flow pattern regulator
Molecule chain rigidity, improves thermal stability；Cation group makes the adsorption rate of flow pattern regulator strand and clay particle
It is significantly improved with intensity, realizes complete packet quilt, inhibits clay aquation；Carboxylic acid aquation group in acrylates makes clay particle table
Face forms solvated layer, to form electrostatic repulsion between clay particle, reduces flocculation, improves the stabilization of system
Property；The presence of potassium ion makes polymer be provided with anti-polyelectrolyte effect, and viscosity increases instead under hypersaline environment.Therefore exist
Under high temperature, environment with high salt, wellbore fluid maintains good rheological characteristic, and and drilling well while tying up to strong rejection capability
Fluid loss additive sanlose (CMC) in liquid, carboxymethyl starch (CMS) system compatibility are good；It is transition metal-catalyzed
Agent can reduce the initiation temperature of whole system to 16 DEG C hereinafter, extending induction period, be conducive to molecule chain growth.
The beneficial effects of the present invention are:
1) organic sulfonic acid group and cation group are introduced in organic functions monomer of the invention has adjusting agent molecule
Chain rigidity and space net structure；The use of transition-metal catalyst reduces initiation temperature, and reduces the dosage of the agent caused；
2) product of the invention has stronger salt resistance, cream and other pollution capacities；Rejection ability is strong, and anti sloughing effectiveness is good,
In drilling process, performance is stablized, and is easy to adjust, can meet the drillng operation needs under complicated geological environment；Rejection ability is strong, prevents
Effect of collapsing is good, can be effectively controlled geology sensitive clay, mineral hydration swelling, disperses to make prize；Solid concentration inferior is low, lubricity
It is good, the construction requirement of natural deflecting well of the hole angle less than 20 °, directional well can be met；
3) product temperature resistance ability of the invention is strong, and the temperature resistance ability of brine drilling liquid system can be made after addition product of the present invention
Reach 150 DEG C or more.
Specific embodiment
Technical solution of the present invention is illustrated below with reference to embodiment.
Embodiment 1:
The present invention provides a kind of drilling fluid flow pattern regulator A and preparation method thereof, includes the following steps:
1) potassium hydroxide of 3.8g is obtained into potassium hydroxide solution with the deionized water dissolving of 10g；
2) the 2- acrylamide-2-methylpro panesulfonic acid mixture of the acrylic acid of 3.8g and 2.2g are put into reactor,
To reaction potassium hydroxide solution is wherein added dropwise, after being added dropwise with ammonium hydroxide tune pH be 6.5；
3) urine of the acrylamide of 15g, the acrylyl oxy-ethyl-trimethyl salmiac of 1g, 0.3g are put into reactor again
The deionized water of element, 3ppm transition-metal catalyst, 34g, after mixing pours into the solution in reactor with isolation film
Metal polymerization slot in；
4) initiator of 160ppm, the foaming agent of 0.53g, the confined reaction 2h under the protection of nitrogen are added into polymerization tank
After obtain copolymerization blob of viscose；
5) copolymerization blob of viscose is rubbed, 100 DEG C of crushed after being dried obtain finished product A.
Embodiment 2:
The present invention provides a kind of drilling fluid flow pattern regulator B and preparation method thereof, includes the following steps:
1) potassium hydroxide of 3.5g is obtained into potassium hydroxide solution with the deionized water dissolving of 10g；
2) the 2- acrylamide-2-methylpro panesulfonic acid mixture of the acrylic acid of 2.27g and 6.53g are put into reactor
In, to reaction potassium hydroxide solution is wherein added dropwise, after being added dropwise with ammonium hydroxide tune pH be 6.3；
3) urine of the acrylamide of 15g, the acrylyl oxy-ethyl-trimethyl salmiac of 1g, 0.3g are put into reactor again
The deionized water of element, 3ppm transition-metal catalyst, 34g, after mixing pours into the solution in reactor with isolation film
Metal polymerization slot in；
4) initiator of 160ppm, the foaming agent of 0.53g, the confined reaction 3h under the protection of nitrogen are added into polymerization tank
After obtain copolymerization blob of viscose；
5) copolymerization blob of viscose is rubbed, 110 DEG C of crushed after being dried obtain finished product B.
Embodiment 3:
The present invention provides a kind of drilling fluid flow pattern regulator C and preparation method thereof, includes the following steps:
1) potassium hydroxide of 3.5g is obtained into potassium hydroxide solution with the deionized water dissolving of 10g；
2) the 2- acrylamide-2-methylpro panesulfonic acid mixture of the acrylic acid of 3.8g and 2.2g are put into reactor,
To reaction potassium hydroxide solution is wherein added dropwise, after being added dropwise with ammonium hydroxide tune pH be 6~7；
3) acrylamide of 15g, the acrylyl oxy-ethyl-trimethyl salmiac of 1.2g, 0.3g are put into reactor again
The deionized water of urea, 3ppm transition-metal catalyst, 34g after mixing pours into the solution in reactor with isolation
In the metal polymerization slot of film；
4) initiator of 160ppm, the foaming agent of 0.53g, the confined reaction 3h under the protection of nitrogen are added into polymerization tank
After obtain copolymerization blob of viscose；
5) copolymerization blob of viscose is rubbed, 120 DEG C of crushed after being dried obtain finished product C.
Embodiment 4:
The present invention provides a kind of drilling fluid flow pattern regulator D and preparation method thereof, includes the following steps:
1) potassium hydroxide of 3.5g is obtained into potassium hydroxide solution with the deionized water dissolving of 10g；
2) the 2- acrylamide-2-methylpro panesulfonic acid mixture of the acrylic acid of 3g and 4.5g are put into reactor, to
Reaction potassium hydroxide solution is wherein added dropwise, after being added dropwise with ammonium hydroxide tune pH be 6~7；
3) acrylamide of 15g, the acrylyl oxy-ethyl-trimethyl salmiac of 1.33g, 0.3g are put into reactor again
Urea, 3ppm transition-metal catalyst, 34g deionized water, after mixing by the solution in reactor pour into every
In metal polymerization slot from film；
4) initiator of 160ppm, the foaming agent of 0.53g, the confined reaction 3h under the protection of nitrogen are added into polymerization tank
After obtain copolymerization blob of viscose；
5) copolymerization blob of viscose is rubbed, 120 DEG C of crushed after being dried obtain finished product D.
Product drilling fluid flow pattern regulator mud property of the invention is measured:
1, the test procedure with slurry of drilling fluid flow pattern regulator:
A) the water base slurry of saturated salt is prepared and is measured
In the specimen cup that two fill 350ml saturated brine, 1.75g anhydrous sodium bicarbonate and 35.00g drilling fluid is added
Sodium bentonite is tested, 20min is stirred on high speed agitator, should at least interrupt once be adhered on wall of cup with scraping therebetween
Clay.
One of them is poured into maintenance tank to curing in airtight condition is for 24 hours at 25 DEG C ± 3 DEG C.
Base slurry is poured into specimen cup, high-speed stirred 5min, turns viscosimeter with six speed and measure it at 25 DEG C ± 3 DEG C
The stabilization readings of 600r/min and 300r/min calculates apparent viscosity AV and yield value YP.The viscosity and shear force of base slurry should accord with rule
Otherwise provisioning request increases and decreases drilling fluid test and uses the dosage of sodium bentonite and anhydrous sodium bicarbonate, until reaching requirement；
B) preparation and measurement of test slurry
Into another specimen cup be added 3.50g sample, continue high-speed stirred 20min, should at least interrupt therebetween once with
Scrape the sample being adhered on wall of cup.Will test slurry pour into maintenance tank at 25 DEG C ± 3 DEG C curing in airtight condition, for 24 hours afterwards will test
Slurry pours into specimen cup, high-speed stirred 5min, with six fast rotary viscosity design determinings its at 25 DEG C ± 3 DEG C 600r/min and
The stabilization readings of 300r/min, computational plasticity viscosity PV and yield value YP；
C) saturated salt water slurry filter loss measures
In the specimen cup for filling 350mL saturated brine, 1.00g sodium bicarbonate and the test of 35.00g drilling fluid is added with commenting
Valence soil, high-speed stirred 20min at least interrupt the clay for scraping be adhered on wall of cup with glass bar twice therebetween.
Base slurry is transferred in drilling fluid maintenance tank, is conserved for 24 hours at 25 DEG C ± 3 DEG C.
By after maintenance base slurry pour into specimen cup, high-speed stirred 5min, with drilling fluid filtration instrument measure its
Filtrate volume under 690kPa between 7.5min~30min calculates its filter loss FL；
D) 1% concentration tests starch leak-off measurement
In the specimen cup for filling 350mL saturated brine, 1.00g sodium bicarbonate and the test of 35.00g drilling fluid is added with commenting
Valence soil, high-speed stirred 20min at least interrupt the clay for scraping be adhered on wall of cup with glass bar twice therebetween.
3.50g sample is added, high-speed stirred 20min is at least interrupted secondary to scrape the sample being adhered on wall of cup therebetween.
Test slurry is transferred in drilling fluid maintenance tank, is conserved for 24 hours at 25 DEG C ± 3 DEG C.
By after maintenance test slurry pour into specimen cup, high-speed stirred 5min, with drilling fluid filtration instrument measure its
Filtrate volume under 690kPa between 7.5min~30min calculates its filter loss FL.
For further test product performance, at 120 DEG C of temperature, measured again after heat rolling 16h, measurement method, step
Suddenly identical as method, the step under above-mentioned room temperature.The flow pattern regulator mud property of product of the present invention is shown in Table 1:
The mud property of 1 product of the present invention of table
Alphabetical meaning in table are as follows: AV: the apparent viscosity of drilling fluid, PV: the plastic viscosity of drilling fluid, FL: filter loss, YP/
PV: ratio of dynamic shear force/yield value to plastic viscosity.
2, the inhibition experiment of product of the present invention
The measurement of product of the present invention inhibition drilling cuttings aquation dispersibility: test Jing Sha group mud stone landwaste, by Q/SH0323-
2009 standards execute, and survey relative inhibition, and data are shown in Table 2.
Measure two parts of 350mL distilled water, a copy of it be added 1.05g sodium carbonate, another be added 1.5% sample and
1.05g sodium carbonate, high-speed stirred 5min.35.00g calcium bentonite is added in two parts, high-speed stirred 20min is rolled at 120 DEG C
16h, high-speed stirred 5min after cooling, by the readings (base of viscosimeter under the regulation measurement 100r/min of GB/T16783.1-2006
Otherwise slurry 100r/min readings should should replace calcium bentonite in 110 ± 10 ranges).
2 flow pattern regulator of table
| Embodiment | Relative inhibition (%) |
| 1.5% regulator A | 91.1 |
| 1.5% regulator B | 93.6 |
| 1.5% regulator C | 92.7 |
| 1.5% regulator D | 94.6 |
The above results and scene, which are tried out, shows that product of the present invention has the property that 1, stronger salt resistance, cream and other dirts
Dye ability, in drilling process, performance is stablized, and is easy to adjust, can meet the drillng operation needs under complicated geological environment；2, inhibit
Ability is strong, and anti sloughing effectiveness is good, can be effectively controlled geology sensitive clay, mineral hydration swelling, dispersion pulping；3, solid phase inferior contains
Measure low, lubricity is good, can meet the construction requirement of natural deflecting well of the hole angle less than 20 °, directional well；4, temperature resistance ability is strong,
The temperature resistance ability of brine drilling liquid system reaches 150 DEG C or more.
3, field application example
It is evaluated by indoor lot of experimental data, scene is respectively 4 mouthfuls of region tests of Zhong Shi, Ma Wang mausoleum, overflowing sun, Jiangling etc.
Well, 1. oblique 181 well in mound is a mouthful rolling prospecting well, and complete well 2200m, 244.5mm casing setting depth 550m do not seal the Jing Sha group of lower part
With new ditch mouth group (complexity such as easy aquation dispersion and peeling collapsing), two are opened using brine system, and flow pattern regulator A is used to replace passing
After the tackifier of system, sand sample representativeness is good after being drilled into Jing Sha group, and without obvious chip off-falling phenomenon, underground is normal, and mud property stablizes (number
According to being shown in Table 3).Full well construction is very well, without any complexity.The city ②Zhong area easily accident complexity mostly occur block clock 8 tiltedly -30,
Clock 8 tiltedly -31 wells be two mouthfuls it is whole drag well, clock 8 tiltedly -30 two opens salt water using colloid protecting resistances such as conventional tackifiers, occurs in construction different
Often；And tiltedly -31 wells are normal using underground after flow pattern regulator B for clock 8.3. tiltedly -7 wells are whole on the basis of tiltedly -5 well of horse 84 to horse 84
Drag well, two open stifled using brine system, and the latter replaces traditional tackifier using flow pattern regulator C, and underground is normal, and the former complete well
Logging blocking 2280m (data are shown in Table lattice).4. overflowing 45 tiltedly -8, overflowing 45 tiltedly -9 wells be it is whole drag well, two open using brine system, use
Flow pattern regulator D maintainability, underground are all normal.
3 field application data statistics of table
By the field test of several mouthfuls of wells of each block, product of the present invention replaces traditional tackifier to obtain very good effect, can
With field popularization application.
The above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although above-described embodiment to the present invention into
Gone detailed description, the related technical personnel of this field it is understood that can modify to the present invention or replace on an equal basis, but
Any modification and part replacement for not departing from spirit and scope of the invention should all be covered in scope of the presently claimed invention.
Claims (5)
1. a kind of drilling fluid flow pattern regulator, which is characterized in that caused by acrylamide, acrylates, organic functions monomer
Be copolymerized under the action of agent, catalyst and auxiliary agent, the organic functions monomer be 2- acrylamide-2-methylpro panesulfonic acid with
The mixture of acrylyl oxy-ethyl-trimethyl salmiac, the catalyst are transition-metal catalyst, and transition-metal catalyst can
The initiation temperature of whole system is reduced to 16 DEG C or less；
The acrylamide, acrylates, organic functions monomer mass ratio be 13 ~ 15:2 ~ 4:3 ~ 9；The 2- acrylamide
The mass ratio of base -2- methyl propane sulfonic acid and acrylyl oxy-ethyl-trimethyl salmiac is 2 ~ 7:1 ~ 2；
The acrylates is potassium acrylate, and the potassium acrylate is made by acrylic acid and potassium hydroxide；
The initiator is the redox system of ammonium persulfate and high temperature reducing agent composition, and the auxiliary agent includes urea and hair
Infusion.
2. drilling fluid flow pattern regulator according to claim 1, which is characterized in that the acrylamide, has acrylates
The mass ratio of machine function monomer is 15:2.27~3.8:3.2 ~ 7.86；The 2- acrylamide-2-methylpro panesulfonic acid and propylene
The mass ratio of acyloxyethyl trimethyl ammonium chloride is 2.2 ~ 6.53:1 ~ 1.33.
3. the preparation method of drilling fluid flow pattern regulator according to claim 1, which comprises the following steps:
1) by deionized water, acrylamide, acrylic acid, potassium hydroxide, 2- acrylamide-2-methylpro panesulfonic acid, acryloyl-oxy
Ethyl-trimethyl salmiac, urea, catalyst are added in polymerization tank after mixing, and adjusting pH is 6 ~ 7；
2) under the protection of nitrogen, confined reaction obtains copolymerization blob of viscose after initiator, foaming agent are added into polymerization tank；
3) copolymerization blob of viscose successively through and rubbing, is dry, crushing, obtain finished product.
4. the preparation method of drilling fluid flow pattern regulator according to claim 3, which is characterized in that the polymerization tank is band
There is the metal polymerization slot of isolation film；The foaming agent is inorganic salts.
5. the preparation method of drilling fluid flow pattern regulator according to claim 3, which is characterized in that according to the mass fraction,
Specifically includes the following steps:
1) 3.5 ~ 3.8 parts of potassium hydroxide is obtained into potassium hydroxide solution with 10 parts of deionized water dissolving；
2) 2.0~4.0 parts of acrylic acid and 2.0~7.0 parts of 2- acrylamide-2-methylpro panesulfonic acid mixture are put into anti-
Answer in device, to reaction potassium hydroxide solution is wherein added dropwise, after being added dropwise with ammonium hydroxide tune pH be 6 ~ 7；
3) 13~15 parts of acrylamide, 1~2 part of acrylyl oxy-ethyl-trimethyl salmiac, 0.3 are put into reactor again
~0.35 part of urea, 3ppm catalyst, 34 parts of deionized water, pour into polymerization tank for the solution in reactor after mixing
In；
4) initiator, 0.50~0.55 part of the foaming agent of 160ppm are added into polymerization tank, it is closed anti-under the protection of nitrogen
Copolymerization blob of viscose is obtained after answering 2 ~ 3h；
5) copolymerization blob of viscose is rubbed, the crushed after being dried at 100~120 DEG C obtains finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610903728.4A CN106496408B (en) | 2016-10-17 | 2016-10-17 | Drilling fluid flow pattern regulator and preparation method thereof |
Applications Claiming Priority (1)
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Effective date of registration: 20220524 Address after: 100027 Chaoyangmen North Street, Chaoyang District, Chaoyang District, Beijing Patentee after: SINOPEC Group Patentee after: SINOPEC OILFIELD SERVICE Corp. Patentee after: SINOPEC OILFIELD SERVICE JIANGHAN Corp. Address before: 100101 Chaoyang District, Beijing Hui Xin Street 6, Twelfth level. Patentee before: SINOPEC OILFIELD SERVICE Corp. Patentee before: Sinopec Jianghan Petroleum Engineering Co., Ltd |