CN109867742A - A kind of production method of third ethylene copolymer - Google Patents
A kind of production method of third ethylene copolymer Download PDFInfo
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- CN109867742A CN109867742A CN201910192556.8A CN201910192556A CN109867742A CN 109867742 A CN109867742 A CN 109867742A CN 201910192556 A CN201910192556 A CN 201910192556A CN 109867742 A CN109867742 A CN 109867742A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 229920001038 ethylene copolymer Polymers 0.000 title claims abstract description 17
- 239000000047 product Substances 0.000 claims abstract description 30
- 239000002994 raw material Substances 0.000 claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 12
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000004971 Cross linker Substances 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 10
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims abstract description 10
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 239000000178 monomer Substances 0.000 claims abstract description 9
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 8
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000005303 weighing Methods 0.000 claims abstract description 8
- 238000004090 dissolution Methods 0.000 claims abstract description 6
- 238000002360 preparation method Methods 0.000 claims abstract description 5
- 238000006116 polymerization reaction Methods 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 239000003999 initiator Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000010298 pulverizing process Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000005469 granulation Methods 0.000 claims description 2
- 230000003179 granulation Effects 0.000 claims description 2
- 238000004806 packaging method and process Methods 0.000 claims description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 239000011265 semifinished product Substances 0.000 claims description 2
- FKOZPUORKCHONH-UHFFFAOYSA-N 2-methylpropane-1-sulfonic acid Chemical compound CC(C)CS(O)(=O)=O FKOZPUORKCHONH-UHFFFAOYSA-N 0.000 claims 1
- 239000006071 cream Substances 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract description 20
- 238000005553 drilling Methods 0.000 abstract description 18
- 239000000654 additive Substances 0.000 abstract description 13
- 230000000996 additive effect Effects 0.000 abstract description 13
- 239000000706 filtrate Substances 0.000 abstract description 5
- 101100373011 Drosophila melanogaster wapl gene Proteins 0.000 abstract description 3
- 210000004483 pasc Anatomy 0.000 abstract description 3
- 238000000518 rheometry Methods 0.000 abstract description 3
- 230000001603 reducing effect Effects 0.000 abstract description 2
- 150000003839 salts Chemical class 0.000 description 8
- 238000006277 sulfonation reaction Methods 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 239000004021 humic acid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical group C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000005445 natural material Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Abstract
The present invention relates to fluid loss additive technical fields, and disclose a kind of production method of third ethylene copolymer, the preparation method specific implementation step are as follows: by acrylic acid, acrylamide, 2- acrylamide-2-methyl propane sulfonic, quaternary ammonium salt monomer, active crosslinker, extraordinary these raw material of emulsifier, carry out weighing by a certain percentage and select；The raw material of pro rate after step 1 is weighed, are sequentially placed into reaction kettle, are stirred, and accelerate dissolution, and mixing time 20min-30min allows raw material uniform dissolution.And the fluid loss additive for boring fluid prepared in the present invention, specially a kind of third ethylene copolymer (Pasc), have temperature resistance ability strong in actual drilling fluid system, and filtrate reducing effect is good, dosage is few simultaneously, the small feature of rheology impact most importantly in drilling fluid, solves the problems, such as existing in similar-type products in the specific use process.
Description
Technical field
The present invention relates to fluid loss additive technical field, specially a kind of production method of third ethylene copolymer.
Background technique
Country's fluid loss additive for boring fluid is mainly lost with natural macromolecular material and its modified product, humic acids drop at present
Aqua, polymerize based on species fluid loss additive sulfonation class fluid loss agent, and most widely used, the preferable high-temperature salt-resistant drop of application effect
Fluid loss agents are sulfonated-pheno-formoldehyde resins.All kinds of drilling fluid systems around the product are preferable using for many years, having at home
Resistant to high temperatures, saline-alkaline tolerance.
The fluid loss additive that existing market is adapted to drilling fluid is broadly divided into following a few classes: natural material and its modified production
Product: the type product is in the case that in temperature slightly higher (more than 150 DEG C), drilling fluid salinity is big, filtrate-loss control can sharply under
Drop, and will affect drilling fluid rheology；Humic acids fluid loss agent: such product is no more than 180 DEG C in temperature, has centainly
Heat-resisting property, and it is cheap.But with the increase of drilling fluid salinity, filtrate-loss control can be also with decrease.The country is modified
Humic acid fluid loss additive majority contains heavy metal, there is certain pollution to water body and environment；Sulfonation class fluid loss agent: such product
It has applied at home for many years, sulfonated-pheno-formoldehyde resin is representative, forms drilling fluid system of more sets based on it.But sulfonation
There are the substances such as certain free phenol, aldehyde in product always, and phenolic resin itself has due to its technological reason in class product
Stronger stability, it is not degradable in ground end, therefore have certain pollution to environment.With the continuous progress of technology, domestic current
It constantly explores and is phased out sulfonation class product as drilling fluid additive；It polymerize species fluid loss additive: such drop dehydration
Agent is domestic focus development direction at present.Although most of to have preferable heatproof anti-in the research of polymer filtrate reducer
Salt performance, but the difference between all kinds of polymer performances is small, and most researchs only rest on the laboratory lab scale stage, due to this
Quasi polymer viscosity is big, reaction amplification effect is obvious, and the example of product successful commercialization and field application is few.
Summary of the invention
For the above-mentioned technical problems in the prior art, the embodiment provides a kind of New drilling fluid use
The production method of fluid loss additive.
In order to solve the above technical problems, the embodiment of the present invention the technical solution adopted is that:
A kind of production method of third ethylene copolymer, including acrylic acid, acrylamide, 2- acrylamide -2- methyl-prop sulphur
Acid, quaternary ammonium salt monomer, active crosslinker, extraordinary emulsifier, and the raw material in the present invention is distinguished by weight ratio specifically:
Acrylic acid 25%-35%, acrylamide 22%-30%, 2- acrylamide-2-methyl propane sulfonic 18%-25%, quaternary ammonium salt monomer
10%-15%, active crosslinker 5%-9%, extraordinary emulsifier 3%-5%.
Preferably, needing equipment to be used in production process is respectively reaction kettle, polymerization tank, fluidized bed, pulverizer.
Preferably, described by raw material propylene acid, acrylamide, 2- acrylamide-2-methyl propane sulfonic, quaternary ammonium salt list
Body, active crosslinker, extraordinary emulsifier, are put in proportion into reaction kettle after weighing, and the advanced 300r/min that crosses is carried out quickly
Then rotational speed regulation to 120r/min is stirred by stirring, mixing time 5min-10min, keep raw material adequately equal
Even mixing, mixing time 25min-30min.
Preferably, the product that will be stirred is transferred to polymerization tank, and initiator is added, and is carried out with 200r/min
Stirring, carries out sudden and violent poly- reaction, then time 30min-40min stops being cooled down.
Preferably, the substance that will have been cooled down is transferred on fluidized bed, by the work of fluidized bed, successively carry out
The process of threshing, drying, and shifted by conveyer belt.
Preferably, the semi-finished product for shifting threshing by transmission belt carry out pulverization process, then pack to pulverizer
It stacks.
Preferably, concrete operations process is as follows:
By acrylic acid, acrylamide, 2- acrylamide-2-methyl propane sulfonic, quaternary ammonium salt monomer, active crosslinker, special type
These raw material of emulsifier carry out weighing by a certain percentage and select；
It is sequentially placed into the raw material of the pro rate after weighing in reaction kettle, is stirred, accelerates dissolution, when stirring
Between be 20min-30min, allow raw material uniform dissolution；
The raw material that will sufficiently dissolve are transferred to inside polymerization tank through draw-off pump inside reaction kettle, continue to stir,
Increase initiator while agitating and carry out sudden and violent poly- reaction, the sudden and violent poly- reaction time is 30min-40min；
Stop polymerization tank work, the product after cruelly poly- reaction is stood into cooling, time 15min-20min；
Product after cooling is transferred on fluidized bed, carries out being granulated the processing with drying process；
By granulation after dry finished product be transferred in pulverizer, after being crushed by pulverizer, continue to weigh
Packaging, is then transferred in factory library and is stored.
Compared with prior art, the production method of the third ethylene copolymer of one kind provided by the embodiment of the present invention, preparation
Fluid loss additive for boring fluid, mainly the third ethylene copolymer (Pasc), it is a kind of multiple copolymer, and the characteristic of product is
It is strong with product temperature resistance ability, it, can anti-saturation salt, complex salt under 220 DEG C of situations in drilling fluid system；Product saline-alkaline tolerance
By force, it under the Various Complexes situation such as salt water, sylvite, calcium salt, remains to play fabulous filtrate loss controllability；Product dosage is small, conventional
Dosage 0.2%-0.5%, 0.6% or more dosage under high temperature and high salt situation, the correlated performance that can greatly improve drilling fluid refer to
Product safety, environmental protection are marked, is suitable for various environmentally friendly system drilling liquid under the new situation, and product of the present invention is adaptable to new situations
Under environmentally friendly drilling fluid system in, can be used as the substitute of sulfonation type high temp salt resistant filter loss reduction agent；The product is also applicable simultaneously
In domestic high-temperature salt-resistant drilling fluid systems all kinds of at this stage, filter loss regulator, drilling fluid flow pattern regulator, shale suppression can be used as
The multiple functions additive applications such as preparation, mud cake quality improver are in petroleum drilling technology.
It should be appreciated that foregoing general description and it is described in detail below be merely exemplary with it is illustrative, rather than use
In the limitation disclosure.
Present specification provides the various realizations or exemplary general introduction of technology described in the disclosure, is not disclosed skill
The comprehensive disclosure of the full scope of art or all features.
Detailed description of the invention
Fig. 1 is flow diagram of the invention.
Specific embodiment
So that the purposes, technical schemes and advantages of the embodiment of the present disclosure are clearer, below in conjunction with the embodiment of the present disclosure
Attached drawing, the technical solution of the embodiment of the present disclosure is clearly and completely described.Obviously, described embodiment is this public affairs
The a part of the embodiment opened, instead of all the embodiments.Based on described embodiment of the disclosure, ordinary skill
Personnel's every other embodiment obtained under the premise of being not necessarily to creative work, belongs to the range of disclosure protection.
Unless otherwise defined, the technical term or scientific term that the disclosure uses should be tool in disclosure fields
The ordinary meaning for thering is the personage of general technical ability to be understood.The similar word meaning such as " comprising " or "comprising" used in the disclosure
Point out that element or object before the existing word are covered the element for appearing in the word presented hereinafter or object and its be equal, without
Exclude other elements or object." connection " either the similar word such as " connected " is not limited to physics or mechanical company
It connects, can also include electrical connection, it is either direct or indirect."upper", "lower", "left", "right" etc. are only used for table
Show relative positional relationship, after the absolute position for being described object changes, then the relative positional relationship may also correspondingly change.
A kind of production method of third ethylene copolymer provided by the invention, the raw material needed are sieved by way of weighing
Choosing, specific ratio are as follows: acrylic acid 25%-35%, acrylamide 22%-30%, 2- acrylamide-2-methyl propane sulfonic 18%-
25%, quaternary ammonium salt monomer 10%-15%, active crosslinker 5%-9%, extraordinary emulsifier 3%-5%.
Meanwhile needing the equipment to be used arrived by process in a kind of production method of third ethylene copolymer provided by the invention
Step is successively reaction kettle, polymerization tank, fluidized bed, pulverizer.
Process in referring to Fig.1, the preparation method concrete operation step of the polymer filtrate reducer of offer of the invention are as follows:
1. putting the raw materials into reaction kettle, the advanced 300r/min that crosses quickly is stirred, and allows raw material to mix, mixing time
Then rotational speed regulation to 120r/min is stirred by specially 5min-10min, mixing time 25min-30min, allows original
Material is adequately uniformly mixed, in order to the quality of product in subsequent processing；
2. the raw material after stirring is transferred to the inside of polymerization tank by draw-off pump, and be stirred with 200r/min, then
Initiator is added allows initiator to play a role in stirring, the sudden and violent poly- reaction of progress, and handles the time as 30min-40min；
3. the mass temperature after sudden and violent poly- reaction is very high, it is therefore desirable to process can be just further processed in cooling,
Therefore after cruelly poly- reaction terminates, static 15min-20min makes product cooling；
4. we are transferred in fluidized bed at this point, the product after supercooling, threshing and drying process are carried out；
5. product after threshing, is transported by conveyer belt to pulverizer, packed into crossing after pulverization process, and be transported to
Factory is stored in library.
And further illustrate the fluid loss additive prepared in production procedure of the present invention, a kind of specifically multiple copolymer,
Mainly the third ethylene copolymer (Pasc) is being added inside wellbore fluid, reaches filtrate reducing, and, drop strong with temperature resistance ability
Filtration effect is good, dosage is few, the small feature of rheology impact in drilling fluid.
Above embodiments are only exemplary embodiment of the present invention, are not used in the limitation present invention, protection scope of the present invention
It is defined by the claims.Those skilled in the art can within the spirit and scope of the present invention make respectively the present invention
Kind modification or equivalent replacement, this modification or equivalent replacement also should be regarded as being within the scope of the present invention.
Claims (6)
1. a kind of production method of third ethylene copolymer, the preparation method specific implementation step are as follows:
1), by acrylic acid, acrylamide, 2- acrylamide-2-methyl propane sulfonic, quaternary ammonium salt monomer, active crosslinker, extraordinary cream
These raw material of agent carry out weighing by a certain percentage and select；
2) raw material of the pro rate after, step 1 is weighed are sequentially placed into reaction kettle, are stirred, and are accelerated dissolution, are stirred
Mixing the time is 20min-30min, allows raw material uniform dissolution；
3), the raw material sufficiently dissolved that will be obtained in step 2 are transferred in polymerization tank by draw-off pump from reaction kettle, are continued
Stirring increases initiator while agitating and carries out sudden and violent poly- reaction, and the sudden and violent poly- reaction time is 30min-40min；
4), stop polymerization tank work, the product in step 3 after cruelly poly- reaction is stood into cooling, time 15min-
20min；
5), product after cooling in step 4 is transferred on fluidized bed, carries out being granulated the processing with drying process；
6), finished product dry after the granulation in step 5 is transferred in pulverizer, after being crushed by pulverizer, continue into
Row weighing packaging, is then transferred in factory library and is stored.
2. a kind of production method of third ethylene copolymer according to claim 1, it is characterised in that: the raw material include
Acrylic acid, acrylamide, 2- acrylamide-2-methyl propane sulfonic, quaternary ammonium salt monomer, active crosslinker, extraordinary emulsifier, it is special
Sign is: the raw material is respectively as follows: acrylic acid 25%-35%, acrylamide 22%-30%, 2- acrylamide-by weight ratio
2- methyl propane sulfonic acid 18%-25%, quaternary ammonium salt monomer 10%-15%, active crosslinker 5%-9%, extraordinary emulsifier 3%-
5%.
It is respectively reaction kettle, polymerization tank, fluidized bed, pulverizer that equipment to be used is needed in production process.
3. a kind of production method of third ethylene copolymer according to claim 1, it is characterised in that: described by raw material propylene
Acid, acrylamide, 2- acrylamide-2-methyl propane sulfonic, quaternary ammonium salt monomer, active crosslinker, extraordinary emulsifier, by weighing
After be put in proportion into reaction kettle, it is advanced cross 300r/min quickly stirred, mixing time 5min-10min, then will turn
Speed is adjusted to 120r/min and is stirred, and mixes raw material adequately uniformly, mixing time 25min-30min.
4. a kind of production method of third ethylene copolymer according to claim 1, it is characterised in that: it is described will be in step 2
The product being stirred is transferred to polymerization tank, and adds initiator, and is stirred with 200r/min, carries out sudden and violent poly- reaction, time
For 30min-40min, then stop being cooled down.
5. a kind of production method of third ethylene copolymer according to claim 1, it is characterised in that: in the step 3
The substance cooled down is transferred on fluidized bed, by the work of fluidized bed, successively carries out the process of threshing, drying, and pass through
Conveyer belt is shifted.
6. a kind of production method of third ethylene copolymer according to claim 1, it is characterised in that: lead in the step 6
The semi-finished product of transmission belt transfer threshing are crossed to pulverizer, carry out pulverization process, then pack is stacked.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910192556.8A CN109867742A (en) | 2019-03-14 | 2019-03-14 | A kind of production method of third ethylene copolymer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910192556.8A CN109867742A (en) | 2019-03-14 | 2019-03-14 | A kind of production method of third ethylene copolymer |
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Family
ID=66920417
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102643632A (en) * | 2012-04-06 | 2012-08-22 | 茂名市三元化工有限公司 | High-temperature salt-resistant fluid loss agent and production method thereof |
| CN104263329A (en) * | 2014-09-19 | 2015-01-07 | 中国石油集团渤海钻探工程有限公司 | High-temperature resistant and salt-tolerance filtrate reducer for drilling fluid and preparation method thereof |
| CN104497995A (en) * | 2014-12-16 | 2015-04-08 | 北京奥凯立科技发展股份有限公司 | Salt-resistant and calcium-resistant filtrate reducer applied to drilling fluid and preparation method of filtrate reducer |
| CN104762068A (en) * | 2015-03-25 | 2015-07-08 | 新疆贝肯能源工程股份有限公司 | Emulsion type fluid loss agent for drilling liquid and preparation method of emulsion type fluid loss agent |
| CN105237679A (en) * | 2015-10-30 | 2016-01-13 | 卫辉市化工有限公司 | Preparation method of oil well cement emulsion polymer fluid loss agent |
| CN108641683A (en) * | 2018-03-30 | 2018-10-12 | 中国石油大学(华东) | A kind of high temperature resistance high salinity high-density water-based drilling fluid and its application |
-
2019
- 2019-03-14 CN CN201910192556.8A patent/CN109867742A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102643632A (en) * | 2012-04-06 | 2012-08-22 | 茂名市三元化工有限公司 | High-temperature salt-resistant fluid loss agent and production method thereof |
| CN104263329A (en) * | 2014-09-19 | 2015-01-07 | 中国石油集团渤海钻探工程有限公司 | High-temperature resistant and salt-tolerance filtrate reducer for drilling fluid and preparation method thereof |
| CN104497995A (en) * | 2014-12-16 | 2015-04-08 | 北京奥凯立科技发展股份有限公司 | Salt-resistant and calcium-resistant filtrate reducer applied to drilling fluid and preparation method of filtrate reducer |
| CN104762068A (en) * | 2015-03-25 | 2015-07-08 | 新疆贝肯能源工程股份有限公司 | Emulsion type fluid loss agent for drilling liquid and preparation method of emulsion type fluid loss agent |
| CN105237679A (en) * | 2015-10-30 | 2016-01-13 | 卫辉市化工有限公司 | Preparation method of oil well cement emulsion polymer fluid loss agent |
| CN108641683A (en) * | 2018-03-30 | 2018-10-12 | 中国石油大学(华东) | A kind of high temperature resistance high salinity high-density water-based drilling fluid and its application |
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