CN106496408A - 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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- C—CHEMISTRY; METALLURGY
- 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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- C08F2/44—Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
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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
- C09K8/24—Polymers
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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 technology
In Jianghan Basin is typical inland Faulted Salt Lake Basin formation characteristics：Special depositional environment, stratum salt cream development,
The pure salt deposit cumulative thickness of Partial Block is up to more than 1800 meters；Bittern enriches；Geothermal gradient is high；Smectite content is high；Creaming mudstone
Development, water sensitivity are strong；Stratum aquation dispersiveness 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 increasing number.
According to the special ground of In Jianghan Basin and geological conditions, saturated brine, compound salt solution in drillng operation, is generally used
Prepared polymer drilling fluid.But the increase with salt content, electrolyte concentration increase, the acidity of the aquation group of polymer is got over
Weak, go hydration stronger, make inorganic agent fail；Compressed the electric double layer of clay particle in drilling fluid simultaneously, hydration shell becomes
Thin, flocculation is formed between clay particle, cause system solid concentration to reduce, viscosity, shear force decline, and property of drilling fluid is deteriorated, from
And carrying capacity reduces, bit speed is had a strong impact on.Therefore, be adapt to Jiang-Han Area characteristic DWSW liquid system, need to develop
Being capable of temperature resistance, the additive for drilling fluid of anti-saturation salt solution.
Content of the invention
It is an object of the invention to provide a kind of drilling fluid flow pattern regulator and preparation method thereof, by organic functions monomer
Middle introducing organic sulfonic acid group and cation group make regulation agent molecule that there is chain rigidity and space net structure, product have compared with
Strong salt resistance, cream and other pollution capacities, in drilling process, stable performance, it is easy to adjust can meet the salt water drilling of Jiang-Han Area characteristic
The drillng operation of well liquid system needs.
To achieve these goals, the technical solution used in the present invention is as follows：
A kind of drilling fluid flow pattern regulator, by acrylamide, acrylates, organic functions monomer in initiator, catalyst
Form with copolymerization in the presence of auxiliary agent, the organic functions monomer is 2- acrylamide-2-methylpro panesulfonic acids and acryloyl-oxy
The mixture of ethyl-trimethyl salmiac, the catalyst are transition-metal catalyst.
According to above scheme, the acrylamide, acrylates, the mass ratio of organic functions monomer are 13～15:2～4:
3～9；The 2- acrylamide-2-methylpro panesulfonic acids are 2～7 with the mass ratio of acrylyl oxy-ethyl-trimethyl salmiac:1
～2.
According to above scheme, the acrylamide, acrylates, the mass ratio of organic functions monomer are 15:2.27～
3.8:3.2～7.86；The 2- acrylamide-2-methylpro panesulfonic acids and the mass ratio of 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 the redox system that above scheme, the initiator are constituted with high temperature reducing agent for ammonium persulfate, institute
Stating auxiliary agent includes urea, foaming agent.
A kind of preparation method of drilling fluid flow pattern regulator, comprises the following steps：
1) by deionized water, acrylamide, acrylic acid, potassium hydroxide, 2- acrylamide-2-methylpro panesulfonic acids, propylene
Acyloxyethyl trimethyl ammonium chloride, urea, catalyst are added after being well mixed in polymerization tank, and it is 6～7 to adjust pH；
2) under the protection of nitrogen, after adding initiator, foaming agent in polymerization tank, confined reaction obtains copolymerization blob of viscose；
3) copolymerization blob of viscose is sequentially passed through rubbing, drying, is crushed, obtain finished product.
According to above scheme, the polymerization tank is the metal polymerization groove with barrier film；The foaming agent is inorganic salts.
According to above scheme, according to the mass fraction, following steps are specifically included：
1) 3.5～3.8 parts of potassium hydroxide is obtained potassium hydroxide solution with 10 parts of deionized water dissolving；
2) the 2- acrylamide-2-methylpro panesulfonic acids mixture of 2.0～4.0 parts of acrylic acid and 2.0～7.0 parts is thrown
Entering in reactor, potassium hydroxide solution being added dropwise wherein to reaction, it is 6～7 pH to be adjusted with ammoniacal liquor after completion of dropping；
3) acrylamide of 13～15 parts of input, 1～2 part of acrylyl oxy-ethyl-trimethyl chlorination in reactor again
Solution in reactor is poured into after being well mixed by ammonium, 0.3～0.35 part of urea, 3ppm catalyst, 34 parts of deionized water
In polymerization tank；
4) initiator of addition 160ppm, 0.50～0.55 part of foaming agent in polymerization tank, 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, crushed after being dried at 100～120 DEG C obtains finished product.
The present invention organic functions monomer in 2- acrylamide-2-methylpro panesulfonic acids contain organic sulfonic acid group, third
Alkene acyloxyethyl trimethyl ammonium chloride contains cation group, and organic sulfonic acid group is insensitive to salt, enhance flow pattern regulator
Molecule chain rigidity, improves heat endurance；Cation group makes the adsorption rate of flow pattern regulator strand and clay particle
Significantly improve with intensity, realize complete packet quilt, suppress clay aquation；Carboxylic acid aquation group in acrylates makes clay particle table
Face defines solvated layer, so as to form electrostatic repulsion between clay particle, reduces flocculation, improves stablizing for system
Property；The presence of potassium ion, makes polymer be provided with anti-polyelectrolyte effect, and under hypersaline environment, viscosity increases on the contrary.Therefore exist
In the environment of high temperature, 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, CMS (CMS) system compatibility are good；Transition metal-catalyzed
Agent can reduce the initiation temperature of whole system to less than 16 DEG C, extend induction period, increase beneficial to strand.
The invention has the beneficial effects as follows：
1) introducing organic sulfonic acid group and cation group in organic functions monomer of the invention has regulation agent molecule
Chain rigidity and space net structure；Using for transition-metal catalyst reduces initiation temperature, and the consumption of the agent for reducing causing；
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, stable performance, it is easy to adjust can meet the drillng operation needs under complicated geological environment；Rejection ability is strong, prevents
Effect of collapsing is good, and prize is made in energy effective control geology sensitive clay, mineral hydration swelling, dispersion；Solid concentration inferior is low, lubricity
Good, natural deflecting well of the hole angle less than 20 °, the construction requirement of directional well can be met；
3) product temperature resistance ability of the invention is strong, can make the temperature resistance ability of DWSW liquid system after adding product of the present invention
Reach more than 150 DEG C.
Specific embodiment
Technical scheme is illustrated with reference to embodiment.
Embodiment 1：
The present invention provides a kind of drilling fluid flow pattern regulator A and preparation method thereof, comprises the steps：
1) potassium hydroxide of 3.8g is obtained potassium hydroxide solution with the deionized water dissolving of 10g；
2) the 2- acrylamide-2-methylpro panesulfonic acids mixture of the acrylic acid and 2.2g of 3.8g is put in reactor,
Potassium hydroxide solution is added dropwise wherein to reaction, and it is 6.5 to adjust pH with ammoniacal liquor after completion of dropping；
3) acrylamide of 15g, the acrylyl oxy-ethyl-trimethyl salmiac of 1g, the urine of 0.3g are put into in reactor again
Element, 3ppm transition-metal catalysts, the deionized water of 34g, after being well mixed pour the solution in reactor with barrier film into
Metal polymerization groove in；
4) initiator, the foaming agent of 0.53g of 160ppm, confined reaction 2h under the protection of nitrogen are added in 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, comprises the steps：
1) potassium hydroxide of 3.5g is obtained potassium hydroxide solution with the deionized water dissolving of 10g；
2) by the 2- acrylamide-2-methylpro panesulfonic acids mixture input reactor of the acrylic acid and 6.53g of 2.27g
In, potassium hydroxide solution is added dropwise wherein to reaction, it is 6.3 to adjust pH with ammoniacal liquor after completion of dropping；
3) acrylamide of 15g, the acrylyl oxy-ethyl-trimethyl salmiac of 1g, the urine of 0.3g are put into in reactor again
Element, 3ppm transition-metal catalysts, the deionized water of 34g, after being well mixed pour the solution in reactor with barrier film into
Metal polymerization groove in；
4) initiator, the foaming agent of 0.53g of 160ppm, confined reaction 3h under the protection of nitrogen are added in 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, comprises the steps：
1) potassium hydroxide of 3.5g is obtained potassium hydroxide solution with the deionized water dissolving of 10g；
2) the 2- acrylamide-2-methylpro panesulfonic acids mixture of the acrylic acid and 2.2g of 3.8g is put in reactor,
Potassium hydroxide solution is added dropwise wherein to reaction, and it is 6～7 to adjust pH with ammoniacal liquor after completion of dropping；
3) acrylamide of 15g, the acrylyl oxy-ethyl-trimethyl salmiac of 1.2g, 0.3g are put into in reactor again
Urea, 3ppm transition-metal catalysts, the deionized water of 34g, after being well mixed pour the solution in reactor with isolation into
In the metal polymerization groove of film；
4) initiator, the foaming agent of 0.53g of 160ppm, confined reaction 3h under the protection of nitrogen are added in 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, comprises the steps：
1) potassium hydroxide of 3.5g is obtained potassium hydroxide solution with the deionized water dissolving of 10g；
2) the 2- acrylamide-2-methylpro panesulfonic acids mixture of the acrylic acid and 4.5g of 3g is put in reactor, to
Reaction is wherein added dropwise potassium hydroxide solution, and it is 6～7 to adjust pH with ammoniacal liquor after completion of dropping；
3) acrylamide of 15g, the acrylyl oxy-ethyl-trimethyl salmiac of 1.33g, 0.3g are put into in reactor again
Urea, 3ppm transition-metal catalysts, the deionized water of 34g, after being well mixed by the solution in reactor pour into carry every
In the metal polymerization groove of film；
4) initiator, the foaming agent of 0.53g of 160ppm, confined reaction 3h under the protection of nitrogen are added in 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.
The product drilling fluid flow pattern regulator mud property of the present invention is measured：
1st, 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 two specimen cups for filling 350ml saturated brines, 1.75g anhydrous sodium bicarbonates and 35.00g drilling fluids is added
Test sodium bentonite, on high speed agitator stirs 20min, should at least interrupt therebetween once sticking on wall of cup to scrape
Clay.
By one of them pour into maintenance tank at 25 DEG C ± 3 DEG C curing in airtight condition 24h.
Base slurry is poured in specimen cup, high-speed stirred 5min, turn viscosimeter with six speed and determine which at 25 DEG C ± 3 DEG C
The stable readings of 600r/min and 300r/min, calculates apparent viscosity AV and yield value YP.The viscosity of base slurry and shear force should accord with rule
Provisioning request, the otherwise dosage of increase and decrease drilling fluid test sodium bentonite and anhydrous sodium bicarbonate, until it reaches require；
B) preparation and measurement of test slurry
To in another specimen cup add 3.50g samples, continue high-speed stirred 20min, should at least interrupt therebetween once with
Scrape the sample sticked on wall of cup.Will test slurry pour into maintenance tank at 25 DEG C ± 3 DEG C curing in airtight condition, after 24h will test
Slurry is poured in 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 stable readings of 300r/min, computational plasticity viscosity PV and yield value YP；
C) saturated salt water slurry filter loss measurement
In the specimen cup for filling 350mL saturated brines, 1.00g sodium acid carbonates and the test of 35.00g drilling fluids is added with commenting
Valency soil, high-speed stirred 20min at least interrupt scraping the clay sticked on wall of cup twice with glass bar therebetween.
Base slurry is proceeded in drilling fluid maintenance tank, and 24h is conserved at 25 DEG C ± 3 DEG C.
After by maintenance base slurry pour in specimen cup, high-speed stirred 5min, with drilling fluid filtration instrument determine its
Filtrate volume under 690kPa between 7.5min～30min, calculates its filter loss FL；
D) 1% concentration tests slurry leak-off measurement
In the specimen cup for filling 350mL saturated brines, 1.00g sodium acid carbonates and the test of 35.00g drilling fluids is added with commenting
Valency soil, high-speed stirred 20min at least interrupt scraping the clay sticked on wall of cup twice with glass bar therebetween.
3.50g samples, high-speed stirred 20min is added at least to interrupt therebetween secondary scraping the sample sticked on wall of cup.
Test slurry is proceeded in drilling fluid maintenance tank, and 24h is conserved at 25 DEG C ± 3 DEG C.
After by maintenance test slurry pour in specimen cup, high-speed stirred 5min, with drilling fluid filtration instrument determine its
Filtrate volume under 690kPa between 7.5min～30min, calculates its filter loss FL.
For further test product performance, in 120 DEG C of temperature, measured after heat rolling 16h again, measuring method, step
Suddenly identical with the method under above-mentioned normal temperature, step.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
In table, alphabetical implication is：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.
2nd, the inhibition experiment of product of the present invention
Product of the present invention suppresses the measure of drilling cuttings aquation dispersibility：Test with Jing Sha group mud stone landwaste, by Q/SH0323-
2009 standards are executed, and survey relative inhibition, and data are shown in Table 2.
Measure two parts of 350mL distilled water, a copy of it adds 1.05g sodium carbonate, another 1.5% sample of addition and
1.05g sodium carbonate, high-speed stirred 5min.35.00g calcium bentonites, high-speed stirred 20min is added to roll at 120 DEG C in two parts
16h, high-speed stirred 5min after cooling determine the readings (base of viscosimeter under 100r/min by the regulation of GB/T16783.1 2006
Slurry 100r/min readings otherwise should should change calcium bentonite in the range of 110 ± 10).
2 flow pattern regulator of table
| Embodiment | Relative inhibition (%) |
| 1.5% conditioning agent A | 91.1 |
| 1.5% conditioning agent B | 93.6 |
| 1.5% conditioning agent C | 92.7 |
| 1.5% conditioning agent D | 94.6 |
The above results and scene are tried out and are shown, product of the present invention has the property that：1st, stronger salt resistance, cream and other dirts
Dye ability, in drilling process, stable performance, it is easy to adjust can meet the drillng operation needs under complicated geological environment；2nd, suppress
Ability is strong, and anti sloughing effectiveness is good, can effective control geology sensitive clay, mineral hydration swelling, dispersion pulping；3rd, solid phase inferior contains
Amount is low, and lubricity is good, can meet natural deflecting well of the hole angle less than 20 °, the construction requirement of directional well；4th, temperature resistance ability is strong,
The temperature resistance ability of DWSW liquid system reaches more than 150 DEG C.
3rd, live application example
Evaluated by indoor lot of experimental data, scene is respectively in 4 mouthfuls of region tests such as Zhong Shi, Ma Wang mausoleum, overflowing sun, Jiangling
Well, 1. oblique 181 well in mound is a mouthful rolling prospecting well, and completion 2200m, 244.5mm casing setting depth 550m do not seal the Jing Sha groups of bottom
With new ditch mouth group (easy aquation dispersion and peeling off cave in wait complicated), two open and use brine system, replace biography using flow pattern regulator A
After the tackifier of system, after being drilled into Jing Sha groups, sand sample representativeness is good, and without block phenomenon is substantially fallen, down-hole is normal, the stable (number of mud property
According to being shown in Table 3).Full well construction is very well, without any complexity.②Zhong cities area easily accident complexity mostly occur block clock 8 tiltedly -30,
8 oblique -31 wells of clock be two mouthfuls whole drag well, clock 8 tiltedly -30 two opens salt solution using colloid protecting resistances such as conventional tackifiers, occurs different in construction
Often；And 8 oblique -31 wells of clock are normal using down-hole after flow pattern regulator B.3. 84 oblique -7 wells of horse are whole on the basis of 84 oblique -5 wells of horse
Drag well, two open stifled adopt brine system, the latter to replace traditional tackifier using flow pattern regulator C, down-hole is normal, and the former completion
Logging blocking 2280m (data are shown in Table lattice).4. overflowing 45 tiltedly -8,45 oblique -9 wells of overflowing be whole drag well, two open and use brine system, use
Flow pattern regulator D maintainabilities, down-hole are all normal.
3 live 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.
Above example only in order to illustrative and not limiting technical scheme, although above-described embodiment enters to the present invention
Detailed description is gone, the person skilled of this area should be understood：The present invention can be modified or be replaced on an equal basis, but
Any modification and local without departing from spirit and scope of the invention is replaced and all should be covered in scope of the presently claimed invention.
Claims (8)
1. a kind of drilling fluid flow pattern regulator, it is characterised in that caused by acrylamide, acrylates, organic functions monomer
Copolymerization in the presence of agent, catalyst and auxiliary agent is formed, the organic functions monomer be 2- acrylamide-2-methylpro panesulfonic acids with
The mixture of acrylyl oxy-ethyl-trimethyl salmiac, the catalyst are transition-metal catalyst.
2. drilling fluid flow pattern regulator according to claim 1, it is characterised in that the acrylamide, acrylates, have
The mass ratio of machine function monomer is 13～15:2～4:3～9；The 2- acrylamide-2-methylpro panesulfonic acids and acryloyl-oxy
The mass ratio of ethyl-trimethyl salmiac is 2～7:1～2.
3. drilling fluid flow pattern regulator according to claim 1, it is characterised in that the acrylamide, acrylates, have
The mass ratio of machine function monomer is 15:2.27～3.8:3.2～7.86；The 2- acrylamide-2-methylpro panesulfonic acids and third
The mass ratio of alkene acyloxyethyl trimethyl ammonium chloride is 2.2～6.53:1～1.33.
4. drilling fluid flow pattern regulator according to claim 1, it is characterised in that the acrylates is potassium acrylate,
The potassium acrylate is obtained with potassium hydroxide by acrylic acid.
5. drilling fluid flow pattern regulator according to claim 1, it is characterised in that the initiator is ammonium persulfate with
The redox system of high temperature reduction agent composition, the auxiliary agent include urea, foaming agent.
6. a kind of preparation method of drilling fluid flow pattern regulator, it is characterised in that comprise the following steps：
1) by deionized water, acrylamide, acrylic acid, potassium hydroxide, 2- acrylamide-2-methylpro panesulfonic acids, acryloyl-oxy
Ethyl-trimethyl salmiac, urea, catalyst are added after being well mixed in polymerization tank, and it is 6～7 to adjust pH；
2) under the protection of nitrogen, after adding initiator, foaming agent in polymerization tank, confined reaction obtains copolymerization blob of viscose；
3) copolymerization blob of viscose is sequentially passed through rubbing, drying, is crushed, obtain finished product.
7. the preparation method of drilling fluid flow pattern regulator according to claim 6, it is characterised in that the polymerization tank is band
There is the metal polymerization groove of barrier film；The foaming agent is inorganic salts.
8. the preparation method of drilling fluid flow pattern regulator according to claim 6, it is characterised in that according to the mass fraction,
Specifically include following steps：
1) 3.5～3.8 parts of potassium hydroxide is obtained potassium hydroxide solution with 10 parts of deionized water dissolving；
2) will be anti-for the 2- acrylamide-2-methylpro panesulfonic acids mixture input of 2.0～4.0 parts of acrylic acid and 2.0～7.0 parts
Answering in device, potassium hydroxide solution being added dropwise wherein to reaction, it is 6～7 pH to be adjusted with ammoniacal liquor after completion of dropping；
3) again in reactor put into 13～15 parts acrylamide, 1～2 part of acrylyl oxy-ethyl-trimethyl salmiac, 0.3
～0.35 part of urea, 3ppm catalyst, 34 parts of deionized water, pour the solution in reactor into polymerization tank after being well mixed
In；
4) initiator of addition 160ppm, 0.50～0.55 part of foaming agent in polymerization tank, closed anti-under the protection of nitrogen
Copolymerization blob of viscose is obtained after answering 2～3h；
5) copolymerization blob of viscose is rubbed, crushed after being dried at 100～120 DEG C obtains finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN110606909A (en) * | 2018-12-25 | 2019-12-24 | 北京石大博诚科技有限公司 | Flow pattern regulator copolymer for drilling fluid and preparation method thereof |
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| CN110606909A (en) * | 2018-12-25 | 2019-12-24 | 北京石大博诚科技有限公司 | Flow pattern regulator copolymer for drilling fluid and preparation method thereof |
| CN110606909B (en) * | 2018-12-25 | 2021-04-20 | 北京石大博诚科技有限公司 | Flow pattern regulator copolymer for drilling fluid and preparation method thereof |
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