CN107814870A - A kind of high temperature resistant drilling fluids spherical polymer inorganic agent and preparation method thereof - Google Patents
A kind of high temperature resistant drilling fluids spherical polymer inorganic agent and preparation method thereof Download PDFInfo
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- 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
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- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
- C08F2/30—Emulsion polymerisation with the aid of emulsifying agents non-ionic
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- 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
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- 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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- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/58—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide containing oxygen in addition to the carbonamido oxygen, e.g. N-methylolacrylamide, N-(meth)acryloylmorpholine
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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
- C09K8/035—Organic additives
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- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/58—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide containing oxygen in addition to the carbonamido oxygen, e.g. N-methylolacrylamide, N-(meth)acryloylmorpholine
- C08F220/585—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide containing oxygen in addition to the carbonamido oxygen, e.g. N-methylolacrylamide, N-(meth)acryloylmorpholine and containing other heteroatoms, e.g. 2-acrylamido-2-methylpropane sulfonic acid [AMPS]
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Abstract
The invention provides a kind of drilling fluid spherical polymer inorganic agent.Drilling fluid provided by the invention spherical polymer inorganic agent, is prepared by the raw material comprising following mass parts：40~56 parts of oil phase；40~56 parts of aqueous phase；2~5 parts of initiator；2~5 parts of crosslinking agent.The drilling fluid that the present invention obtains is spherical in three-dimensional with spherical polymer inorganic agent outward appearance, and particle diameter distribution is in 100~500nm.From the experimental result of embodiment 1~3, the drilling fluid that the present invention obtains with spherical polymer inorganic agent in bentonite slurry after high temperature ageing, viscosity slightly reduces, and filter loss slightly raises, and without viscosity and without filtrate reducing effect after common polyacrylamide and xanthans high temperature ageing；The drilling fluid that the present invention obtains is added in drilling fluid with spherical polymer inorganic agent can significantly maintain the viscosity of drilling fluid in normal range (NR), and filter loss is relatively low；And without viscosity after common polyacrylamide and xanthans high temperature ageing, and filter loss is very big.
Description
Technical field
The present invention relates to drilling technology field, more particularly to a kind of high temperature resistant drilling fluids with spherical polymer inorganic agent and its
Preparation method.
Background technology
With the continuous growth of world energy sources demand and gradually exhausted, the center of gravity of following oil-gas exploration of Shallow Oil-Gas resource
Deep formation or ultra-deep stratum will be progressively turned to, deep-well and ultradeep well probing have become a weight of the drilling industry development from now on
Want direction.The most outstanding problem that deep-well and ultradeep well operation face is exactly underground high temperature (180 DEG C of ＞) and hyperthermal environments,
And ensure that the key technology that deep-well and ultradeep well are smoothly developed is exactly high performance drilling.
High performance drilling mainly lifts its performance by all kinds of inorganic agents wherein added, specific such as lubricant,
Thinner, sealing agent, tackifier, defoamer etc..Wherein, polymer drilling fluid finishing agent is developed most in all inorganic agents
It hurry up, horizontal highest, a kind of inorganic agent that application effect is best, dosage is maximum.
Property of drilling fluid and polymer treatment agent are closely related, and largely determine high temperature deep well and ultradeep well
Progress, safety and the efficiency of operation.Common drilling fluid is affected by temperature larger with polymer treatment agent, is easily occurred at high temperature disconnected
Split, degrade, cause inorganic agent disabler.Such as polyacrylamide inorganic agent, its temperature resistance is only capable of reaching 150 DEG C, more than this
Temperature will fail；And such as xanthans, Chinese scholartree glue biopolymer, its temperature resistance highest are also only 150 DEG C.So in high temperature
In deep drilling, using the drilling fluid of traditional polymer inorganic agent after the high temperature circulation of underground, property of drilling fluid would generally deteriorate,
Cause the problems such as mud cake is thickening, wall building property is poor, filter loss increase, or even the weighting materials such as barite can be caused to settle and cause
Drilling well such as scraps at the major accident.
The content of the invention
It is an object of the invention to provide a kind of high temperature resistant drilling fluids spherical polymer inorganic agent and preparation method thereof, sheet
The drilling fluid spherical polymer inorganic agent that invention provides has excellent high temperature resistant property.
The invention provides a kind of drilling fluid spherical polymer inorganic agent, it is prepared into by the raw material comprising following mass parts
Arrive：
The oil phase includes white oil and emulsifying agent, and the mass ratio of the emulsifying agent and white oil is 3~5:100；
The aqueous phase include 2- acrylamide-2-methylpro panesulfonic acids, N, N- acrylamides, methacrylic acid and
Acrylamide, the 2- acrylamide-2-methylpro panesulfonic acids, N, N- acrylamides, methacrylic acid and acryloyl
The mass ratio of amine is (30~40):(20~40):(20~40):(10~20).
Preferably, the emulsifying agent includes sapn and oleic acid diethyl amide, the sapn and oleic acid diethyl amide
Mass ratio is (40~50):(40~60).
Preferably, the emulsifying agent also includes aerosil；
The mass ratio of the aerosil and sapn for (0,10]:[40,50].
Preferably, the initiator is the one or more in peroxide type initiators and persulfate.
Preferably, the crosslinking agent is methylene-bisacrylamide, N- hydroxyethyl acrylamides and DAAM
In one or more.
The invention provides a kind of drilling fluid preparation method of spherical polymer inorganic agent, comprise the following steps：
Oil phase is mixed with water conjunction and carries out one-level heating, obtains oil water mixture；
The oil water mixture and initiator are mixed and carry out two level heating, obtains the mixture for including initiator；
The mixture including initiator and crosslinking agent are mixed and carry out polymerisation, obtains drilling fluid with spherical polymerization
Thing inorganic agent.
Preferably, the temperature that the one-level heats is 40~50 DEG C；
The time that the one-level heats is 1~3 hour.
Preferably, the temperature that the two level heats is 60~80 DEG C；
The time that the two level heats is 1~3 hour.
Preferably, the temperature of the polymerisation is 40~50 DEG C；
The time of the polymerisation is 4~5 hours.
The invention provides a kind of drilling fluid spherical polymer inorganic agent.The spherical polymerization of drilling fluid provided by the invention
Thing inorganic agent, it is prepared by the raw material comprising following mass parts：40~56 parts of oil phase；40~56 parts of aqueous phase；Initiator 2~5
Part；2~5 parts of crosslinking agent；The oil phase includes white oil and emulsifying agent, and the mass ratio of the emulsifying agent and white oil is 3~5:100；
The aqueous phase includes 2- acrylamide-2-methylpro panesulfonic acids, N, N- acrylamides, methacrylic acid and acryloyl
Amine, the 2- acrylamide-2-methylpro panesulfonic acids, N, the matter of N- acrylamides, methacrylic acid and acrylamide
It is (30~40) to measure ratio:(20~40):(20~40):(10~20).The drilling fluid that the present invention obtains is handled with spherical polymer
Agent has excellent high temperature resistant property, salt-resistance and certain filtrate reducing effect.From the experimental result of embodiment 1~3, sheet
Obtained drilling fluid is invented with spherical polymer inorganic agent particle diameter distribution in 100~500nm, it is old by high temperature in bentonite slurry
After change, viscosity slightly reduces, and filter loss slightly raises, and after common polyacrylamide and xanthans high temperature ageing without viscosity and
Without filtrate reducing effect；The drilling fluid that the present invention obtains is added in drilling fluid with spherical polymer inorganic agent significantly to be maintained
The viscosity of drilling fluid is in normal range (NR), and filter loss is relatively low；And after common polyacrylamide and xanthans high temperature ageing
Without viscosity, and filter loss is very big.
Brief description of the drawings
Fig. 1 is the TEM scanning figures for the drilling fluid spherical polymer inorganic agent that embodiment 1 obtains；
Fig. 2 is the TEM scanning figures for the drilling fluid spherical polymer inorganic agent that embodiment 2 obtains；
Fig. 3 is the TEM scanning figures for the drilling fluid spherical polymer inorganic agent that embodiment 3 obtains；
Fig. 4 is the infrared spectrogram for the drilling fluid spherical polymer inorganic agent that embodiment 1~3 obtains.
Embodiment
The invention provides a kind of drilling fluid spherical polymer inorganic agent, it is prepared into by the raw material comprising following mass parts
Arrive：
The oil phase includes white oil and emulsifying agent, and the mass ratio of the emulsifying agent and white oil is 3~5:100；
The aqueous phase include 2- acrylamide-2-methylpro panesulfonic acids, N, N- acrylamides, methacrylic acid and
Acrylamide, the 2- acrylamide-2-methylpro panesulfonic acids, N, N- acrylamides, methacrylic acid and acryloyl
The mass ratio of amine is (30~40):(20~40):(20~40):(10~20).
In the present invention, the raw material for preparing drilling fluid spherical polymer inorganic agent includes 40~56 parts of oil phases, is preferably
43~53 parts, more preferably 45~50 parts.In the present invention, the oil phase includes white oil and emulsifying agent, the emulsifying agent and white
The mass ratio of oil is 3~5:100, in an embodiment of the present invention, the mass ratio of the emulsifying agent and white oil can be specifically
3:100、4:100 or 5:100.
In the present invention, the emulsifying agent preferably comprises sapn and oleic acid diethyl amide, sapn and the oleic acid diethyl
The mass ratio of alkylolamides is preferably (40~50):(40~60), more preferably (42~48):(43~57), be most preferably (44~
46):(48~53).
In the present invention, the emulsifying agent preferably also includes aerosil；The aerosil and sapn
Mass ratio be preferably (0,10]:[40,50], more preferably [2,8]:[42,48], it is most preferably [4,6]:[44,46].
On the basis of 40~56 parts of oil phases, the present invention prepare drilling fluid spherical polymer inorganic agent raw material include 40~
56 parts of aqueous phases, preferably 43~53 parts, more preferably 45~50 parts.In the present invention, the aqueous phase include 2- acrylamidos-
2- methyl propane sulfonic acids, N, N- acrylamides, methacrylic acid and acrylamide；2- acrylamidos -2- the methyl
Propane sulfonic acid, N, the mass ratio of N- acrylamides, methacrylic acid and acrylamide is (30~40):(20~40):(20
~40):(10~20), it is preferably (32~38):(25~35):(25~35):(12~18), more preferably (34~36):(28
~32):(28~32):(14~16).
On the basis of 40~56 parts of oil phases, the raw material that the present invention prepares drilling fluid spherical polymer inorganic agent includes 2~5
Part initiator, in an embodiment of the present invention, the mass fraction of the initiator can be specifically 2 parts, 3 parts, 4 parts or 5 parts.
In the present invention, the initiator is preferably the one or more in peroxide type initiators and persulfate；The over cure
Hydrochlorate is preferably ammonium persulfate or potassium peroxydisulfate；The peroxide type initiators are preferably benzoyl peroxide.In the present invention
In, when the initiator is preferably two kinds or three kinds in ammonium persulfate, benzoyl peroxide and persulfate, selected thing
The addition of matter is preferably equal.In the present invention, the persulfate is preferably potassium peroxydisulfate and/or sodium peroxydisulfate.
On the basis of 40~56 parts of oil phases, the raw material that the present invention prepares drilling fluid spherical polymer inorganic agent includes 2~5
Part crosslinking agent, in an embodiment of the present invention, the mass fraction of the crosslinking agent can be specifically 2 parts, 3 parts, 4 parts or 5 parts.
In the present invention, the crosslinking agent is preferably methylene-bisacrylamide, N- hydroxyethyl acrylamides and DAAM
In one or more.In the present invention, when the crosslinking agent is preferably methylene-bisacrylamide, N- hydroxyethyl acrylamides
During with two kinds in DAAM or three kinds, the addition of selected species is preferably equal.
The present invention is not particularly limited to the source of above-mentioned all raw materials, is using commercially available above-mentioned raw materials material
Can.
Preparation method present invention also offers drilling fluid described in above-mentioned technical proposal with spherical polymer inorganic agent, comprising
Following steps：
Oil phase is mixed with water conjunction and carries out one-level heating, obtains oil water mixture；
The oil water mixture and initiator are mixed and carry out two level heating, obtains the mixture for including initiator；
The mixture including initiator and crosslinking agent are mixed and carry out polymerisation, obtains drilling fluid with spherical polymerization
Thing inorganic agent.
Oil phase is mixed with water conjunction and carries out one-level heating by the present invention, obtains oil water mixture.In the present invention, it is described
The temperature that one-level heats is preferably 40~50 DEG C, more preferably 42~48 DEG C, most preferably 44~46 DEG C；The one-level adds
The time of heat treatment is preferably 1~3 hour, can be specifically 1 hour, 2 hours or 3 hours.In the present invention, the one-level
Heat the stable oil mixing with water objects system preheated, the emulsion that oil mixing with water is formed provides " spherical micro- for polymerisation
Reactor ", generated beneficial to spherical polymer.
In the present invention, the one-level heats and preferably carried out under agitation, and the speed of the stirring is preferably
900~1100rpm/min, more preferably 950~1050rpm/min, most preferably 980~1030rpm/min.
After obtaining the oil water mixture, the oil water mixture and initiator are mixed and carried out at two level heating by the present invention
Reason, obtains the mixture for including initiator.In the present invention, the temperature that the two level heats is preferably 60~80 DEG C, more
Preferably 65~75 DEG C, most preferably 68~73 DEG C；The time that the two level heats is preferably 1~3 hour, specifically may be used
Think 1 hour, 2 hours or 3 hours.
After obtaining the mixture including initiator, the present invention mixes the mixture including initiator and crosslinking agent
Close and carry out polymerisation, obtain drilling fluid spherical polymer inorganic agent.In the present invention, the temperature of the polymerisation is preferred
For 40~50 DEG C, more preferably 42~48 DEG C, most preferably 44~46 DEG C；The time of the polymerisation is preferably 4~5 small
When.
The feed way that initiator adds crosslinking agent again is first added in present invention selection, first adds initiator and produces activity freely
Base initiated polymerization；Reaction proceeds to certain phase and adds crosslinking agent construction spherical polymer kernel, and enhancing structure is stable
Property.
Drilling fluid provided by the invention with spherical polymer inorganic agent and preparation method thereof and is bored with reference to embodiment
Well liquid is described in detail, but they can not be interpreted as limiting the scope of the present invention.
In the following embodiments, described part is mass parts unless otherwise specified.
Embodiment 1
The aerosil of 12.5g sorbester p17,10g oleic acid diethyl amides and 2.5g is mixed to get emulsifying agent,
500g white oils and 25g emulsifying agents are mixed, obtain oil phase.
By 196.875g 2- acrylamide-2-methylpro panesulfonic acids, 262.5g N, N- acrylamides,
The acrylamide mixing of 131.25g methacrylic acid and 65.625g, obtains aqueous phase.
32.8125g ammonium persulfates and 32.8125g sodium peroxydisulfates are mixed, obtain initiator.
65.625g DAAMs are weighed as crosslinking agent.
Oil phase is mixed with water conjunction, heats 1.5 hours at 40 DEG C, obtains oil water mixture；
The oil water mixture and initiator are mixed, heated 2 hours at 60 DEG C, obtains including the mixed of initiator
Compound；
The mixture including initiator and crosslinking agent are mixed, polymerize 5 hours at 50 DEG C, obtains drilling fluid ball
Shape polymer treatment agent.
Embodiment 2
8g sorbester p17 and 12g oleic acid diethyl amides are mixed to get emulsifying agent, 500g white oils and 20g emulsifying agents are mixed
Close, obtain oil phase.
By 148.56g 2- acrylamide-2-methylpro panesulfonic acids, 148.56g N, N- acrylamides,
The acrylamide mixing of 148.56g methacrylic acid and 148.56g, obtains aqueous phase.
18.57g benzoyl peroxides are weighed as initiator.
9.29g methylene-bisacrylamides and 9.29gN- hydroxyethyl acrylamides are mixed, obtain crosslinking agent.
Oil phase is mixed with water conjunction, heats 1.5 hours at 40 DEG C, obtains oil water mixture；
The oil water mixture and initiator are mixed, heated 2 hours at 80 DEG C, obtains including the mixed of initiator
Compound；
The mixture including initiator and crosslinking agent are mixed, polymerize 5 hours at 50 DEG C, obtains drilling fluid ball
Shape polymer treatment agent.
Embodiment 3
The aerosil of 10g sorbester p17,12.5g oleic acid diethyl amides and 2.5g is mixed to get emulsifying agent,
500g white oils and 25g emulsifying agents are mixed, obtain oil phase.
By 220.5g 2- acrylamide-2-methylpro panesulfonic acids, 147g N, N- acrylamides, 294g first
Base acrylic acid and 73.5g acrylamide mix, and obtain aqueous phase.
13.125g benzoyl peroxides and 13.125g potassium peroxydisulfates are mixed, obtain initiator.
Using 13.125g DAAMs and 13.125g methylene-bisacrylamides as crosslinking agent.
Oil phase is mixed with water conjunction, heats 1.5 hours at 40 DEG C, obtains oil water mixture；
The oil water mixture and initiator are mixed, heated 2 hours at 70 DEG C, obtains including the mixed of initiator
Compound；
The mixture including initiator and crosslinking agent are mixed, polymerize 4.5 hours at 50 DEG C, obtains drilling fluid use
Spherical polymer inorganic agent.
The present invention has carried out TEM scannings with spherical polymer inorganic agent to the drilling fluid that embodiment 1~3 obtains respectively and surveyed
Examination, test result difference is as shown in Figures 1 to 3.Wherein, Fig. 1 is the drilling fluid spherical polymer inorganic agent that embodiment 1 obtains
TEM scanning figures, Fig. 2 are the TEM scanning figures for the drilling fluid spherical polymer inorganic agent that embodiment 2 obtains, and Fig. 3 is embodiment 3
The TEM scanning figures of obtained drilling fluid spherical polymer inorganic agent.The drilling fluid ball obtained from Fig. 1~3, the present invention
Shape polymer treatment agent outward appearance is spherical in three-dimensional, and particle diameter distribution is in 100~500nm.
The present invention has carried out infrared spectrum survey to the drilling fluid that embodiment 1~3 obtains with spherical polymer inorganic agent respectively
Examination, test result difference are as shown in Figure 4.As shown in Figure 4, wave number 3425cm-1The absworption peak at place belongs to-NH2Middle N-H's is flexible
Vibration, 2925cm-1- CH is belonged to the absworption peak at 28542-、-CH3Stretching vibration, 2185cm-1The absworption peak at place is 2-
C=C double bonds in acrylamide-2-methylpro panesulfonic acid, 1666cm-1The carbonyl (C=O) that the absworption peak at place belongs in amide groups
Stretching vibration；1554cm-1For amino absworption peak；1455cm-1The absworption peak at place belongs to-CH2- in-flexural vibrations of c h bond；
1410cm-1The absworption peak at place belongs to-CH2-、-CH3In-flexural vibrations of c h bond, 1173cm-1And 1061cm-1The absworption peak at place
Belong to-SO3The stretching vibration of-middle S-O keys；664cm-1For the stretching vibration absworption peak of-C-S keys.Infared spectrum shows spherical
Polymer contains the characteristic absorption peak of various monomeric building blocks, illustrates copolymer for design product.
The present invention has carried out viscous relative point to the drilling fluid that embodiment 1~3 obtains with spherical polymer inorganic agent respectively
Protonatomic mass is tested, and test result shows polymer bonded restorations 6 × 105~9 × 105Between.
The present invention is respectively to property of the drilling fluid that embodiment 1~3 obtains with spherical polymer inorganic agent in bentonite slurry
It can be tested, as a result as shown in table 1.
Performance of the drilling fluid that the embodiment 1~3 of table 1 obtains with spherical polymer inorganic agent in bentonite slurry.
As shown in Table 1, the drilling fluid that the embodiment of the present invention 1~3 obtains is with spherical polymer inorganic agent in bentonite slurry
After high temperature ageing, viscosity slightly reduces, and filter loss slightly raises, and common polyacrylamide and xanthans high temperature ageing
Afterwards without viscosity and without filtrate reducing effect.
The present invention also respectively to the drilling fluid that embodiment 1~3 obtains with spherical polymer inorganic agent in water-based drilling liquid
Performance in system is tested.The drilling fluid ball of polyacrylamide, xanthans and the present invention are added in blank drilling fluid
Shape polymer treatment agent, checks performance, as a result as shown in table 2 after high temperature ageing.
Performance of the drilling fluid that the embodiment 1~3 of table 2 obtains with spherical polymer inorganic agent in drilling fluid
Note：25 DEG C of standard leak-off condition, 0.7MPa, HTHP leak-off condition are 150 DEG C, 3.5MPa.
As shown in Table 2, the drilling fluid that the embodiment of the present invention 1~3 obtains is added to drilling fluid with spherical polymer inorganic agent
In can significantly maintain the viscosity of drilling fluid in normal range (NR), and filter loss is relatively low；And common polyacrylamide and
Without viscosity after xanthans high temperature ageing, and filter loss is very big.
It is able to know that according to above example, the invention provides a kind of drilling fluid spherical polymer inorganic agent.This hair
The drilling fluid of bright offer spherical polymer inorganic agent, is prepared by the raw material comprising following mass parts：40~56 parts of oil phase；
40~56 parts of aqueous phase；2~5 parts of initiator；2~5 parts of crosslinking agent.The drilling fluid that the present invention obtains is with outside spherical polymer inorganic agent
It is in three-dimensional spherical to see, and particle diameter distribution is in 100~500nm.The brill obtained from the experimental result of embodiment 1~3, the present invention
Well liquid with spherical polymer inorganic agent in bentonite slurry after high temperature ageing, viscosity slightly reduce, filter loss slightly raise,
And without viscosity and without filtrate reducing effect after common polyacrylamide and xanthans high temperature ageing；The drilling fluid that the present invention obtains is used
Spherical polymer inorganic agent, which is added in drilling fluid, can significantly maintain the viscosity of drilling fluid in normal range (NR), and leak-off
Measure relatively low；And without viscosity after common polyacrylamide and xanthans high temperature ageing, and filter loss is very big.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (9)
1. a kind of drilling fluid spherical polymer inorganic agent, is prepared by the raw material comprising following mass parts：
The oil phase includes white oil and emulsifying agent, and the mass ratio of the emulsifying agent and white oil is 3~5:100；
The aqueous phase includes 2- acrylamide-2-methylpro panesulfonic acids, N, N- acrylamides, methacrylic acid and propylene
Acid amides, the 2- acrylamide-2-methylpro panesulfonic acids, N, N- acrylamides, methacrylic acid and acrylamide
Mass ratio is (30~40):(20~40):(20~40):(10~20).
2. drilling fluid according to claim 1 spherical polymer inorganic agent, it is characterised in that the emulsifying agent includes department
Disk and oleic acid diethyl amide, the mass ratio of the sapn and oleic acid diethyl amide is (40~50):(40~60).
3. drilling fluid according to claim 2 spherical polymer inorganic agent, it is characterised in that the emulsifying agent also includes
Aerosil；
The mass ratio of the aerosil and sapn for (0,10]:[40,50].
4. drilling fluid according to claim 1 spherical polymer inorganic agent, it is characterised in that the initiator is peroxide
One or more in compound class initiator and persulfate.
5. drilling fluid according to claim 1 spherical polymer inorganic agent, it is characterised in that the crosslinking agent is methylene
One or more in base bisacrylamide, N- hydroxyethyl acrylamides and DAAM.
6. the preparation method of the drilling fluid spherical polymer inorganic agent described in Claims 1 to 5 any one, include following step
Suddenly：
Oil phase is mixed with water conjunction and carries out one-level heating, obtains oil water mixture；
The oil water mixture and initiator are mixed and carry out two level heating, obtains the mixture for including initiator；
The mixture including initiator and crosslinking agent are mixed and carry out polymerisation, is obtained at drilling fluid spherical polymer
Manage agent.
7. preparation method according to claim 6, it is characterised in that the temperature that the one-level heats is 40~50
℃；
The time that the one-level heats is 1~3 hour.
8. preparation method according to claim 6, it is characterised in that the temperature that the two level heats is 60~80
℃；
The time that the two level heats is 1~3 hour.
9. preparation method according to claim 6, it is characterised in that the temperature of the polymerisation is 40~50 DEG C；
The time of the polymerisation is 4~5 hours.
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| CN110591674A (en) * | 2019-09-28 | 2019-12-20 | 中国石油集团川庆钻探工程有限公司钻井液技术服务公司 | Plugging agent for drilling fluid and preparation method thereof |
| CN112979883A (en) * | 2021-03-17 | 2021-06-18 | 江苏富淼科技股份有限公司 | High-temperature-resistant salt-resistant polymer, and preparation method and application thereof |
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| CN108569884A (en) * | 2018-05-31 | 2018-09-25 | 佛山市高明区爪和新材料科技有限公司 | A kind of preparation method of Combined thermal insulative panel |
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| CN110591674B (en) * | 2019-09-28 | 2021-07-20 | 中国石油集团川庆钻探工程有限公司钻井液技术服务公司 | Plugging agent for drilling fluid and preparation method thereof |
| CN112979883A (en) * | 2021-03-17 | 2021-06-18 | 江苏富淼科技股份有限公司 | High-temperature-resistant salt-resistant polymer, and preparation method and application thereof |
| CN112979883B (en) * | 2021-03-17 | 2022-03-25 | 江苏富淼科技股份有限公司 | High-temperature-resistant salt-resistant polymer, and preparation method and application thereof |
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