CN106832115A - A kind of drilling fluid preparation method of high temperature resistant thinner - Google Patents
A kind of drilling fluid preparation method of high temperature resistant thinner 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
- C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
- C08F222/02—Acids; Metal salts or ammonium salts thereof, e.g. maleic acid or itaconic acid
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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
- C08F8/00—Chemical modification by after-treatment
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- C—CHEMISTRY; METALLURGY
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/02—Alkylation
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/34—Introducing sulfur atoms or sulfur-containing groups
- C08F8/36—Sulfonation; Sulfation
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- 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
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Abstract
The invention discloses a kind of drilling fluid preparation method of high temperature resistant thinner, belong to drilling well auxiliary agent preparing technical field.The present invention is first with itaconic acid and 3 chloropropenes as monomer, azodiisobutyronitrile is initiator, prepare chloropropene itaconic acid copolymer, again with tetrahydrofuran as solvent, iodine is catalyst, catalysis magnesium powder reacts generation RMgBr under cryogenic with bromobenzene, RMgBr is recycled to be reacted with chloropropene itaconic acid copolymer, in copolymer surface grafting phenyl ring, there is sulfonating reaction with oleum again, it is final to prepare drilling fluid high temperature resistant thinner through drying, the present invention makes full use of grignard reaction to be grafted a large amount of this rigid structure of phenyl ring in polymer surfaces, make polymer that there is good resistance to elevated temperatures, and heavy metal ion is free of in product, efficiently solve traditional chromium-iron lignosulfonate class thinner resistance to elevated temperatures not good, and the problem of environment is polluted containing free chromium ion.
Description
Technical field
The invention discloses a kind of drilling fluid preparation method of high temperature resistant thinner, belong to drilling well auxiliary agent technology of preparing neck
Domain.
Background technology
This valuable energy of oil, natural gas is imbedded in underground dearly, and people want to develop it, must just enter
Row petroleum exploration ＆ development, exploration and exploitation all be unable to do without drilling well, in drilling well, are carried to ground for bottom-hole cleaning and drilling cuttings
The circulation of fluid as drilling fluid that drill-well operation is normally carried out is safeguarded in face.And with the development of petroleum industry, it is marine and deep
The exploration and development amount of portion's hydrocarbon stratum is increasing.The deep-well of current China, ultradeep well are more and more more, and bottom hole temperature (BHT) is with well
Increase deeply and gradually rise.The challenges such as the thickening that drilling fluid is caused due to high temperature become increasingly to protrude.Thinner is
Indispensable additive for drilling fluid in drilling process, it can play very important effect to regulation drilling fluid rheology.
Thinner is to realize that starch dilution to disperse and keep the preferable visco-plasticity of fluid is the important oil field of major function
Agent is learned, thinner is also referred to as diluent, subtracts thick dose etc..At present, that is applied in drilling engineering mainly has tannic acid sodium, tannin extract alkali
Liquid, xanthans, ferrochrome lignosulfonate and amphoteric ion polymer etc..Tannate, tannin extract alkali lye etc. are under medium and low temperature
Preferably, maximum operation (service) temperature can only run into Na to viscosity reducing effect up to 110~120 DEG C+、Ca2+、Mg2+Precipitated etc. that can saltout,
It is not suitable for salt solution and high calcium drilling fluid.Chromium-iron lignosulfonate and amphoteric resin viscosity reduction heat-resisting ability improve a lot, and also can only achieve
160~170 DEG C, while chromium-iron lignosulfonate causes after adding, pH value declines, bubble easily occurs in drilling fluid, and mud cake coefficient of friction becomes after self-care
Greatly, more fatal is that it contains free hexavalent chromium, and toxicity is very big, and environment is polluted.
Therefore, small or pollution-free, the anti-high valence ion of development environment pollution and temperature resistance ability are strong, can be applicable offshore drilling, depth
The thinner of well probing, as main direction of studying from now on.
The content of the invention
Present invention mainly solves technical problem：For traditional drilling fluid with resistant to elevated temperatures siderochrome salt thinner temperature tolerance
It can be only 160~170 DEG C, it is impossible to meet 200 DEG C of high temperature above use conditions, and containing free chromium ion, easily pollute environment
Problem, there is provided one kind by being grafted a large amount of benzene ring structures on polymer, then prepares drilling fluid by sulfonating reaction
With the method for high temperature resistant thinner, first with itaconic acid and chlorallylene as monomer, azodiisobutyronitrile is initiator to the present invention,
Chloropropene-itaconic acid copolymer is prepared, then with tetrahydrofuran as solvent, iodine is catalyst, is catalyzed magnesium powder and bromobenzene
Reaction generation RMgBr, recycles RMgBr and chloropropene-itaconic acid copolymer reaction, in copolymer under cryogenic
Surface grafting phenyl ring, then there is sulfonating reaction with oleum, drilling fluid high temperature resistant thinner finally is prepared through drying,
The present invention makes full use of grignard reaction to be grafted a large amount of this rigid structure of phenyl ring in polymer surfaces, has polymer good
Heavy metal ion is free of in resistance to elevated temperatures, and product, it is not good to efficiently solve traditional chromium-iron lignosulfonate class thinner resistance to elevated temperatures,
And the problem of environment is polluted containing free chromium ion.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is：
（1）80~100g itaconic acids are weighed successively, and 0.6~0.8g azodiisobutyronitriles are poured into and fill 400~500mL N, N- bis-
In the there-necked flask of NMF, mixing is stirred until being completely dissolved with glass bar, add 60~80mL3- chloropropenes, with
There-necked flask is moved into digital display afterwards to test the speed in constant temperature blender with magnetic force, is 85~90 DEG C in temperature, rotating speed is 600~800r/min
Under the conditions of, constant temperature 6~8h of stirring reaction, then material in there-necked flask is transferred in Rotary Evaporators, in temperature be 90~95 DEG C
Under the conditions of, concentrated by rotary evaporation removal solvent DMF obtains chloropropene-itaconic acid copolymer, standby；
（2）In the there-necked flask of belt stirrer, 200~300mL tetrahydrofurans are sequentially added, 10~15g is crushed to 325~
The magnesium powder of 500 mesh, 0.1~0.3g iodine, then there-necked flask is placed in ice-water bath, and with 6~8mL/min speed to there-necked flask
In be passed through nitrogen, under nitrogen guard mode, in temperature be 4~6 DEG C, rotating speed be 300~500r/min under the conditions of, by dropping liquid
Funnel is dripped off to 80~100mL bromobenzenes, control are added dropwise in there-necked flask in 45~60min, treats completion of dropping, in nitrogen protection
Under state, continue constant temperature 45~60min of stirring reaction, question response terminates, by material filtering in there-necked flask, collect filtrate；
（3）100~200mL tetrahydrofurans, 60~80g steps are sequentially added in the there-necked flask of belt stirrer（1）Standby chlorine
Propylene-itaconic acid copolymer, adjusts speed of agitator to 600~800r/min at room temperature, under stirring, is leaked by dropping liquid
Struggle against to the above-mentioned gained filtrates of 120~180mL are added dropwise in there-necked flask, control is dripped off in 60~90min, treats completion of dropping, after
45~60min of continuous stirring reaction, then material in there-necked flask is transferred to Rotary Evaporators, under the conditions of being 65~70 DEG C in temperature,
Concentrated by rotary evaporation obtains concentrate to the 1/2 of material original volume；
（4）The above-mentioned gained concentrates of 60~80mL are measured, is poured into and is filled 150~200mL1, in the there-necked flask of 2- dichloroethanes,
There-necked flask is placed in into digital display again to test the speed in constant temperature blender with magnetic force, 50~55 DEG C are adjusted the temperature to, speed of agitator to 400~
500r/min, under constant temperature stirring, by dropping funel to 10~15mL mass fractions are added dropwise in there-necked flask is 20~
30% oleum, control is dripped off in 20~30min, treats completion of dropping, continues 3~5h of constant temperature stirring reaction；
（5）Question response terminates, and dropwise addition mass fraction is 20% sodium hydroxide solution, and pH is to neutrality for regulation, then by thing in there-necked flask
Material is transferred in vacuum drying chamber, dries 8~10h under the conditions of being 80~85 DEG C in temperature, then dried material is placed in into mortar
In, 10~15min is ground, obtain final product drilling fluid high temperature resistant thinner.
Application process of the invention is：First in mass ratio 1:30~1:100, by high temperature resistant thinner obtained in the present invention
It is uniform with drilling fluid mixed, drilling well mixed liquor is obtained, then by gained drilling well mixed liquor addition drilling fluid tank, finally utilize pumping
Drilling well mixed liquor is transmitted and carry out in drilling equipment drilling phase under conventional well by mode.After testing, the present invention is obtained
Drilling fluid high temperature resistant thinner has preferable viscosity reducing effect, is 94.5~97.8%, 200 in 20~30 DEG C of fresh water viscosity break ratios
86.2~90.4%, 20~30 DEG C of salt solution viscosity break ratios are 83~87%, 200~280 DEG C of high temperature to~280 DEG C of high temperature fresh water viscosity break ratios
Salt solution viscosity break ratio is 75~80%, while thinner of the present invention can normally be used in -25~280 DEG C of temperature ranges.
The beneficial effects of the invention are as follows：
（1）Obtained drilling fluid high temperature resistant thinner of the invention does not contain heavy metal chromium ion, and human body and environment will not be made
Into injury, meet environmental requirement；
（2）Drilling fluid high temperature resistant thinner of the invention obtained have environment-friendly, viscosity reduction drop cut ability, high temperature resistant property compared with
Excellent the characteristics of, it is adaptable to fresh water, salt solution, compound salt solution and deep-well, ultradeep well complex drilling liquid system.
Specific embodiment
Weigh 80~100g itaconic acids successively first, 0.6~0.8g azodiisobutyronitriles are poured into and fill 400~500mL
In the there-necked flask of DMF, mixing is stirred until being completely dissolved with glass bar, add 60~80mL3- chlorine
Propylene, then moves to there-necked flask digital display and tests the speed in constant temperature blender with magnetic force, is 85~90 DEG C in temperature, and rotating speed is 600~
Under the conditions of 800r/min, constant temperature 6~8h of stirring reaction, then material in there-necked flask is transferred in Rotary Evaporators, it is in temperature
Under the conditions of 90~95 DEG C, concentrated by rotary evaporation removal solvent DMF obtains chloropropene-itaconic acid copolymer, standby；With
Afterwards in the there-necked flask of belt stirrer, 200~300mL tetrahydrofurans are sequentially added, 10~15g is crushed to 325~500 purposes
Magnesium powder, 0.1~0.3g iodine, then there-necked flask is placed in ice-water bath, and with 6~8mL/min speed to being passed through in there-necked flask
Nitrogen, under nitrogen guard mode, in temperature be 4~6 DEG C, rotating speed be 300~500r/min under the conditions of, by dropping funel to
80~100mL bromobenzenes are added dropwise in there-necked flask, control is dripped off in 45~60min, completion of dropping is treated, in nitrogen guard mode
Under, continuing constant temperature 45~60min of stirring reaction, question response terminates, and by material filtering in there-necked flask, collects filtrate；Again in band
100~200mL tetrahydrofurans, the above-mentioned standby chloropropene-itaconic acid copolymerization of 60~80g are sequentially added in the there-necked flask of agitator
Thing, adjusts speed of agitator to 600~800r/min, under stirring, by dropping funel in there-necked flask at room temperature
The above-mentioned gained filtrates of 120~180mL are added dropwise, control is dripped off in 60~90min, treats completion of dropping, continue stirring reaction 45~
60min, then material in there-necked flask is transferred to Rotary Evaporators, under the conditions of being 65~70 DEG C in temperature, concentrated by rotary evaporation to material
The 1/2 of original volume, obtains concentrate；The above-mentioned gained concentrates of 60~80mL are measured again, are poured into and are filled 150~200mL1,2- dichloros
In the there-necked flask of ethane, then there-necked flask be placed in digital display test the speed in constant temperature blender with magnetic force, adjust the temperature to 50~55 DEG C,
Speed of agitator to 400~500r/min, under constant temperature stirring, by dropping funel in there-necked flask be added dropwise 10~15mL
Mass fraction is 20~30% oleums, and control is dripped off in 20~30min, treats completion of dropping, continues constant temperature stirring reaction 3
~5h；Last question response terminates, and dropwise addition mass fraction is 20% sodium hydroxide solution, and pH is to neutrality for regulation, then by there-necked flask
Material is transferred in vacuum drying chamber, dries 8~10h under the conditions of being 80~85 DEG C in temperature, then dried material is placed in grinds
In alms bowl, 10~15min is ground, obtain final product drilling fluid high temperature resistant thinner.
Example 1
Weigh 80g itaconic acids successively first, 0.6g azodiisobutyronitriles are poured into and fill the three of 400mL DMFs
In mouth flask, mixing being stirred until being completely dissolved with glass bar, adding 60mL3- chloropropenes, there-necked flask is then moved into number
In the aobvious constant temperature blender with magnetic force that tests the speed, in temperature be 85 DEG C, under the conditions of rotating speed is 600r/min, constant temperature stirring reaction 6h, then will
Material is transferred in Rotary Evaporators in there-necked flask, under the conditions of being 90 DEG C in temperature, concentrated by rotary evaporation removal solvent N, N- dimethyl
Formamide, obtains chloropropene-itaconic acid copolymer, standby；Then in the there-necked flask of belt stirrer, 200mL tetra- is sequentially added
Hydrogen furans, 10g is crushed to the magnesium powder of 325 mesh, 0.1g iodine, then there-necked flask is placed in ice-water bath, and with 6mL/min speed to
Nitrogen is passed through in there-necked flask, under nitrogen guard mode, in temperature be 4 DEG C, rotating speed be 300r/min under the conditions of, by dropping liquid
Funnel is dripped off to 80mL bromobenzenes, control are added dropwise in there-necked flask in 45min, treats completion of dropping, under nitrogen guard mode, after
Continuous constant temperature stirring reaction 45min, question response terminates, and by material filtering in there-necked flask, collects filtrate；Again the three of belt stirrer
100mL tetrahydrofurans, the above-mentioned standby chloropropene-itaconic acid copolymers of 60g, at room temperature regulation stirring are sequentially added in mouth flask
Rotating speed to 600r/min, under stirring, as dropping funel in there-necked flask be added dropwise 120mL it is above-mentioned obtained by filtrate, control
System is dripped off in 60min, treats completion of dropping, continues stirring reaction 45min, then material in there-necked flask is transferred into rotary evaporation
Instrument, under the conditions of being 65 DEG C in temperature, concentrated by rotary evaporation obtains concentrate to the 1/2 of material original volume；It is dense that the above-mentioned gained of 60mL is measured again
Contracting liquid, pours into and fills 150mL1, in the there-necked flask of 2- dichloroethanes, then there-necked flask is placed in into the digital display constant temperature magnetic force that tests the speed stirs
Mix in device, adjust the temperature to 50 DEG C, speed of agitator to 400r/min, under constant temperature stirring, by dropping funel to three mouthfuls
It is 20% oleum that 10mL mass fractions are added dropwise in flask, and control is dripped off in 20min, treats completion of dropping, continues constant temperature stirring
Reaction 3h；Last question response terminates, and dropwises addition mass fraction is 20% sodium hydroxide solution, adjusts pH to neutrality, then by there-necked flask
Middle material is transferred in vacuum drying chamber, and 8h is dried under the conditions of being 80 DEG C in temperature, then dried material is placed in mortar, is ground
Mill 10min, obtains final product drilling fluid high temperature resistant thinner.
This example operation is easy, when using, first in mass ratio 1:30, by high temperature resistant thinner obtained in the present invention and brill
Well liquid be well mixed, obtain drilling well mixed liquor, then by gained drilling well mixed liquor add drilling fluid tank in, finally using pumping mode
Drilling well mixed liquor is transmitted and carry out in drilling equipment drilling phase under conventional well.After testing, the obtained drilling well of the present invention
Liquid high temperature resistant thinner has preferable viscosity reducing effect, is 94.5%, 200 DEG C of high temperature fresh water viscosity reductions in 20 DEG C of fresh water viscosity break ratios
86.2%, 20 DEG C of salt solution viscosity break ratios are 83% to rate, 200 DEG C of high temperature salt solution viscosity break ratios 75%, while thinner of the present invention can-
Normally used in 25 DEG C of temperature ranges.
Example 2
Weigh 90g itaconic acids successively first, 0.7g azodiisobutyronitriles are poured into and fill the three of 450mL DMFs
In mouth flask, mixing being stirred until being completely dissolved with glass bar, adding 70mL3- chloropropenes, there-necked flask is then moved into number
In the aobvious constant temperature blender with magnetic force that tests the speed, in temperature be 88 DEG C, under the conditions of rotating speed is 700r/min, constant temperature stirring reaction 7h, then will
Material is transferred in Rotary Evaporators in there-necked flask, under the conditions of being 93 DEG C in temperature, concentrated by rotary evaporation removal solvent N, N- dimethyl
Formamide, obtains chloropropene-itaconic acid copolymer, standby；Then in the there-necked flask of belt stirrer, 250mL tetra- is sequentially added
Hydrogen furans, 13g is crushed to the magnesium powder of 410 mesh, 0.2g iodine, then there-necked flask is placed in ice-water bath, and with 7mL/min speed to
Nitrogen is passed through in there-necked flask, under nitrogen guard mode, in temperature be 5 DEG C, rotating speed be 400r/min under the conditions of, by dropping liquid
Funnel is dripped off to 90mL bromobenzenes, control are added dropwise in there-necked flask in 53min, treats completion of dropping, under nitrogen guard mode, after
Continuous constant temperature stirring reaction 53min, question response terminates, and by material filtering in there-necked flask, collects filtrate；Again the three of belt stirrer
150mL tetrahydrofurans, the above-mentioned standby chloropropene-itaconic acid copolymers of 70g, at room temperature regulation stirring are sequentially added in mouth flask
Rotating speed to 700r/min, under stirring, as dropping funel in there-necked flask be added dropwise 150mL it is above-mentioned obtained by filtrate, control
System is dripped off in 75min, treats completion of dropping, continues stirring reaction 53min, then material in there-necked flask is transferred into rotary evaporation
Instrument, under the conditions of being 68 DEG C in temperature, concentrated by rotary evaporation obtains concentrate to the 1/2 of material original volume；It is dense that the above-mentioned gained of 70mL is measured again
Contracting liquid, pours into and fills 175mL1, in the there-necked flask of 2- dichloroethanes, then there-necked flask is placed in into the digital display constant temperature magnetic force that tests the speed stirs
Mix in device, adjust the temperature to 53 DEG C, speed of agitator to 450r/min, under constant temperature stirring, by dropping funel to three mouthfuls
It is 25% oleum that 13mL mass fractions are added dropwise in flask, and control is dripped off in 25min, treats completion of dropping, continues constant temperature stirring
Reaction 4h；Last question response terminates, and dropwises addition mass fraction is 20% sodium hydroxide solution, adjusts pH to neutrality, then by there-necked flask
Middle material is transferred in vacuum drying chamber, and 9h is dried under the conditions of being 83 DEG C in temperature, then dried material is placed in mortar, is ground
Mill 13min, obtains final product drilling fluid high temperature resistant thinner.
This example operation is easy, when using, first in mass ratio 1:65, by high temperature resistant thinner obtained in the present invention and brill
Well liquid be well mixed, obtain drilling well mixed liquor, then by gained drilling well mixed liquor add drilling fluid tank in, finally using pumping mode
Drilling well mixed liquor is transmitted and carry out in drilling equipment drilling phase under conventional well.After testing, the obtained drilling well of the present invention
Liquid high temperature resistant thinner has preferable viscosity reducing effect, is 96.1%, 240 DEG C of high temperature fresh water viscosity reductions in 25 DEG C of fresh water viscosity break ratios
88.3%, 25 DEG C of salt solution viscosity break ratios are 85% to rate, and 240 DEG C of high temperature salt solution viscosity break ratios are 78%, while thinner of the present invention can be
Normally used in 155 DEG C of temperature ranges.
Example 3
Weigh 100g itaconic acids successively first, 0.8g azodiisobutyronitriles are poured into and fill 500mL DMFs
In there-necked flask, mixing is stirred until being completely dissolved with glass bar, add 80mL3- chloropropenes, then move to there-necked flask
Digital display tests the speed in constant temperature blender with magnetic force, in temperature be 90 DEG C, rotating speed be 800r/min under the conditions of, constant temperature stirring reaction 8h, then
Material in there-necked flask is transferred in Rotary Evaporators, under the conditions of being 95 DEG C in temperature, concentrated by rotary evaporation removal solvent N, N- diformazan
Base formamide, obtains chloropropene-itaconic acid copolymer, standby；Then in the there-necked flask of belt stirrer, 300mL is sequentially added
Tetrahydrofuran, 15g is crushed to the magnesium powder of 500 mesh, 0.3g iodine, then there-necked flask is placed in ice-water bath, and with 8mL/min speed
To nitrogen is passed through in there-necked flask, under nitrogen guard mode, in temperature be 6 DEG C, rotating speed be 500r/min under the conditions of, by drop
Liquid funnel is dripped off to 100mL bromobenzenes, control are added dropwise in there-necked flask in 60min, completion of dropping is treated, in nitrogen guard mode
Under, continuing constant temperature stirring reaction 60min, question response terminates, and by material filtering in there-necked flask, collects filtrate；Stirred in band again
200mL tetrahydrofurans are sequentially added in the there-necked flask of device, the above-mentioned standby chloropropene-itaconic acid copolymers of 80g are adjusted at room temperature
Section speed of agitator to 800r/min, under stirring, as dropping funel in there-necked flask be added dropwise 180mL it is above-mentioned obtained by filter
Liquid, control is dripped off in 90min, treats completion of dropping, continues stirring reaction 60min, then material in there-necked flask is transferred into rotation
Evaporimeter, under the conditions of being 70 DEG C in temperature, concentrated by rotary evaporation obtains concentrate to the 1/2 of material original volume；The above-mentioned institutes of 80mL are measured again
Concentrate, pour into and fill 200mL1, in the there-necked flask of 2- dichloroethanes, then there-necked flask be placed in digital display test the speed constant temperature magnetic
In power agitator, adjust the temperature to 55 DEG C, speed of agitator to 500r/min, under constant temperature stirring, by dropping funel to
It is 30% oleum that 15mL mass fractions are added dropwise in there-necked flask, and control is dripped off in 30min, treats completion of dropping, continues constant temperature
Stirring reaction 5h；Last question response terminates, and dropwise addition mass fraction is 20% sodium hydroxide solution, and pH is to neutrality for regulation, then by three mouthfuls
Material is transferred in vacuum drying chamber in flask, dries 10h under the conditions of being 85 DEG C in temperature, then dried material is placed in into mortar
In, 15min is ground, obtain final product drilling fluid high temperature resistant thinner.
This example operation is easy, when using, first in mass ratio 1:100, by high temperature resistant thinner obtained in the present invention with
Drilling fluid mixed is uniform, obtains drilling well mixed liquor, then by gained drilling well mixed liquor addition drilling fluid tank, finally utilizes pumping side
Drilling well mixed liquor is transmitted and carry out in drilling equipment drilling phase under conventional well by formula.After testing, the present invention is obtained bores
Well liquid high temperature resistant thinner has preferable viscosity reducing effect, is 97.8% in 30 DEG C of fresh water viscosity break ratios, 280 DEG C of high temperature fresh water drops
90.4%, 30 DEG C of salt solution viscosity break ratios are 87% to viscous rate, 280 DEG C of high temperature salt solution viscosity break ratios 80%, while thinner energy of the present invention
Normally used in 280 DEG C of temperature ranges.
Claims (1)
1. a kind of drilling fluid preparation method of high temperature resistant thinner, it is characterised in that specific preparation process is：
（1）80~100g itaconic acids are weighed successively, and 0.6~0.8g azodiisobutyronitriles are poured into and fill 400~500mL N, N- bis-
In the there-necked flask of NMF, mixing is stirred until being completely dissolved with glass bar, add 60~80mL3- chloropropenes, with
There-necked flask is moved into digital display afterwards to test the speed in constant temperature blender with magnetic force, is 85~90 DEG C in temperature, rotating speed is 600~800r/min
Under the conditions of, constant temperature 6~8h of stirring reaction, then material in there-necked flask is transferred in Rotary Evaporators, in temperature be 90~95 DEG C
Under the conditions of, concentrated by rotary evaporation removal solvent DMF obtains chloropropene-itaconic acid copolymer, standby；
（2）In the there-necked flask of belt stirrer, 200~300mL tetrahydrofurans are sequentially added, 10~15g is crushed to 325~
The magnesium powder of 500 mesh, 0.1~0.3g iodine, then there-necked flask is placed in ice-water bath, and with 6~8mL/min speed to there-necked flask
In be passed through nitrogen, under nitrogen guard mode, in temperature be 4~6 DEG C, rotating speed be 300~500r/min under the conditions of, by dropping liquid
Funnel is dripped off to 80~100mL bromobenzenes, control are added dropwise in there-necked flask in 45~60min, treats completion of dropping, in nitrogen protection
Under state, continue constant temperature 45~60min of stirring reaction, question response terminates, by material filtering in there-necked flask, collect filtrate；
（3）100~200mL tetrahydrofurans, 60~80g steps are sequentially added in the there-necked flask of belt stirrer（1）Standby chlorine
Propylene-itaconic acid copolymer, adjusts speed of agitator to 600~800r/min at room temperature, under stirring, is leaked by dropping liquid
Struggle against to the above-mentioned gained filtrates of 120~180mL are added dropwise in there-necked flask, control is dripped off in 60~90min, treats completion of dropping, after
45~60min of continuous stirring reaction, then material in there-necked flask is transferred to Rotary Evaporators, under the conditions of being 65~70 DEG C in temperature,
Concentrated by rotary evaporation obtains concentrate to the 1/2 of material original volume；
（4）The above-mentioned gained concentrates of 60~80mL are measured, is poured into and is filled 150~200mL1, in the there-necked flask of 2- dichloroethanes,
There-necked flask is placed in into digital display again to test the speed in constant temperature blender with magnetic force, 50~55 DEG C are adjusted the temperature to, speed of agitator to 400~
500r/min, under constant temperature stirring, by dropping funel to 10~15mL mass fractions are added dropwise in there-necked flask is 20~
30% oleum, control is dripped off in 20~30min, treats completion of dropping, continues 3~5h of constant temperature stirring reaction；
（5）Question response terminates, and dropwise addition mass fraction is 20% sodium hydroxide solution, and pH is to neutrality for regulation, then by thing in there-necked flask
Material is transferred in vacuum drying chamber, dries 8~10h under the conditions of being 80~85 DEG C in temperature, then dried material is placed in into mortar
In, 10~15min is ground, obtain final product drilling fluid high temperature resistant thinner.
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| CN111205834A (en) * | 2020-01-22 | 2020-05-29 | 中国海洋石油集团有限公司 | Viscosity reducer for high-temperature and high-pressure resistant oil-based drilling fluid and preparation method thereof |
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| CN111205834A (en) * | 2020-01-22 | 2020-05-29 | 中国海洋石油集团有限公司 | Viscosity reducer for high-temperature and high-pressure resistant oil-based drilling fluid and preparation method thereof |
| CN111205834B (en) * | 2020-01-22 | 2022-07-15 | 中国海洋石油集团有限公司 | Viscosity reducer for high-temperature and high-pressure resistant oil-based drilling fluid and preparation method thereof |
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Application publication date: 20170613 |