CN105086961B - A kind of high-efficiency water-base drilling fluid and its synthetic method and application - Google Patents
A kind of high-efficiency water-base drilling fluid and its synthetic method and application Download PDFInfo
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Abstract
The present invention provides a kind of high-efficiency water-base drilling fluid and its synthetic method and application, the drilling fluid includes water, amphoteric ion polymer, anhydrous calcium chloride, native phase, flow pattern regulator, wherein, on the basis of the weight of water, amphoteric ion polymer dosage is 0.5 5wt% of water consumption, anhydrous calcium chloride dosage is 20 70wt% of water consumption, and native phase dosage is 0 6wt% of water consumption, and flow pattern regulator dosage is 0.1 0.4wt% of water consumption.The present invention also provides a kind of water-based drilling solution synthesis and application.Drilling fluid of the present invention makes drilling fluid have excellent rheological property, vena caval filter performance, rejection, sealing characteristics, greasy property by the synergy of calcium chloride and amphoteric ion polymer.
Description
Technical field
The present invention relates to a kind of drilling fluid, more particularly to a kind of drilling fluid containing amphoteric ion polymer.
Background technology
For shale gas stratum cranny development, water sensitivity is strong, leakage easily occurs, collapse, undergauge the features such as, in drilling process
It is middle to solve the problems such as wellbore stability, drop resistance antifriction just as the most important thing of drilling fluid selection.Current domestic shale gas horizontal well
Oil base drilling fluid mainly is used in drilling process, but the high cost of oil base drilling fluid, high pollution are its natural flaws.Water-base drilling fluid
It is very huge in the application prospect of shale gas horizontal well if can have breakthrough suppressing, block, lubricate, take rock sand removal etc.
Greatly.At present, the water-base drilling fluid with larger application potential has glucose glycoside drilling fluid, polyamine class drilling fluid, polymerization
Alcohol drilling fluid, drilling workers and silicate drilling fluid etc..These drilling fluid systems also need to continue on the basis of existing
In-depth research, develops supporting inorganic agent, meets the needs of shale gas development of resources, and can make drilling fluid system towards green
The direction of environmental protection is developed.
Chinese patent CN103146364A describes a kind of high inhibition water-base drilling fluid, and it includes water, polyamine inhibitor, bag
It is suppressed agent, hydrate inhibitor, tackifier, fluid loss additive and fluid lubricant.Drilling fluid is with can effectively suppressing deep water superficial part
Layer borehole well instability, its inhibition are suitable with oil base drilling fluid.Shale rolling rate of recovery is not higher than 95%.Drilling fluid can solve deep water
The generation problem of hydrate, is applicable in the drillng operation of the 3000m depth of waters in drilling well.Chinese patent CN102250595A is public
The drilling fluid for strong retraction activated clay stratum has been opened, it is fine by bentonite, partially hydrolyzed polyacrylamide (PHPA), low adhesive aggregation anion
Tie up element, co-polymer of sulfonate tackifier, potassium chloride, polymeric alcohol, amine based polymer, fatty alcohol ether phosphate, water composition, the drilling well
Liquid rejection and greasy property are close to oil base drilling fluid.Chinese patent CN103013470A discloses one kind and is used for ultra-deep side
Drilling well mud stone high inhibition drilling fluid system, by bentonite slurry, alkaline conditioner, shale control agent, metal ion polymer, lignite
Resin, sulfonated phenol formaldehyde resin, cationic emulsified bitumen, lubricant, emulsifying agent, crude oil and calcium carbonate superfine powder, the drilling fluid
System is to mud shale strong inhibition capability, and shale recovery ratio is up to 90.33%, and high temperature resistance is up to 150 DEG C；The coefficient of friction resistance is distinguished before and after aging
Less than 0.1.
The content of the invention
In view of the shortcomings of the prior art, the present invention provides a kind of high-efficiency water-base drilling fluid and its synthetic method and application.This
The synergy that invention drilling fluid passes through calcium chloride and amphoteric ion polymer so that drilling fluid have excellent rheological property,
Vena caval filter performance, rejection, sealing characteristics, greasy property etc..
The present invention provides a kind of water-base drilling fluid, the drilling fluid include water, amphoteric ion polymer, anhydrous calcium chloride,
Native phase, flow pattern regulator, wherein, on the basis of the weight of water, amphoteric ion polymer dosage is the 0.5-5wt% of water consumption, excellent
Elect 1.5-3wt% as；Anhydrous calcium chloride dosage is the 20-70wt%, preferably 30-60wt% of water consumption；Native phase dosage is water consumption
0-6wt%, preferably 1.5-4wt%, flow pattern regulator dosage are the 0.1-0.4wt%, preferably 0.2-0.3wt% of water consumption.
In water-base drilling fluid of the present invention, the soil is mutually sodium bentonite, in calcium-base bentonite, attapulgite, sepiolite
One or more.
In water-base drilling fluid of the present invention, the flow pattern regulator is xanthans, guar gum, one kind in welan gum or several
Kind.
In water-base drilling fluid of the present invention, heavy weight additive can also be included, the heavy weight additive is barite, lime stone, bloodstone,
Wustite, iron oxide, the one or more in magnesium carbonate, addition can be determined according to the requirement of drilling fluid density.
In water-base drilling fluid of the present invention, shale control agent can also be included, the shale control agent dosage is water consumption
0.1-2wt%, preferably 1-2wt%.The shale control agent can be with potassium chloride, potassium sulfate, potassium nitrate, ammonium chloride, ammonium sulfate, nitre
One or more in sour ammonium, polyethylene glycol, polypropylene glycol, polyethylene glycol propylene glycol block polymer.
Amphoteric ion polymer of the present invention is methylacryoyloxyethyl-N, N- dimethyl propylene sulfonate/propylene
Acid amides bipolymer, concrete structure are as follows：
The synthetic method of amphoteric ion polymer of the present invention comprises the following steps：
（1）Mass ratio is weighed respectively first as 2:1~9:1 dimethylaminoethyl methacrylate and 1, in 3-N-morpholinopropanesulfonic acid
Ester, and PS is added into dimethylaminoethyl methacrylate, then reacted at a temperature of 10~60 DEG C
0.5~4h, last filtered, extracting, dry obtained methylacryoyloxyethyl-N, N- dimethyl propylene sulfonate；
（2）According to（4~2）：（6~8）Mol ratio weigh step respectively（1）Obtained methylacryoyloxyethyl-
N, N- dimethyl propylene sulfonate and acrylamide, N is passed through after adding solvent dissolving20.5~1h of deoxygenation, while it is warming up to 50~
70 DEG C, 4~6h of initiator for reaction is added after 5~10min of constant temperature, gelatinous solid is obtained after reaction, is obtained with acetone precipitation white
Sediment；
（3）By step（2）Obtained sediment crushes after drying 16~24h at 100~120 DEG C, final both sexes from
Sub- copolymer.
In the synthetic method of amphoteric ion polymer of the present invention, step（1）Middle dimethylaminoethyl methacrylate and 1,
The mass ratio of 3-N-morpholinopropanesulfonic acid lactone is 2.5:1~8:1.
In the synthetic method of amphoteric ion polymer of the present invention, step（1）Middle PS is added drop-wise to methyl-prop
In olefin(e) acid dimethylaminoethyl or directly disposably it is added in dimethylaminoethyl methacrylate, preferably the side of being directly added into
Formula.Use the dimethylaminoethyl methacrylate weighed during directly disposable add and PS mass ratio for
5.2:1~7.8:1.Dimethylaminoethyl methacrylate and PS mass ratio is 2.5 when using the mode of dropwise addition:
1~5:1, PS can be heated and melted before dropwise addition.
In the synthetic method of amphoteric ion polymer of the present invention, step（1）Reaction condition be in 20~55 DEG C of temperature
1~3h of lower reaction.
In the synthetic method of amphoteric ion polymer of the present invention, step（1）Middle extraction solvent selects methanol or ethanol, preferably
Ethanol, extraction times are 1~3h.The drying is that 10~20h is dried under the conditions of 30~50 DEG C.
In the synthetic method of amphoteric ion polymer of the present invention, step（2）Described in solvent be deionized water or salt solution,
Monomer gross mass concentration is 20%~40% after adding solvent, and the NaCl concentration added in the salt solution is 0~0.5mol/L.
In the synthetic method of amphoteric ion polymer of the present invention, step（2）The middle initiator used is potassium peroxydisulfate, over cure
It is any in sour sodium, ammonium persulfate；The initiator amount accounts for the 0.3%~0.5% of monomer gross mass.
The synthetic method of water-base drilling fluid of the present invention comprises the following steps, is first according to ratio and weighs water, two respectively
Property ionomer, anhydrous calcium chloride, native phase, flow pattern regulator, then add native phase into water, abundant aquation or it is scattered after,
Flow pattern regulator is added, high-speed stirred makes it add anhydrous calcium chloride after fully dissolving, and temperature rises after adding anhydrous calcium chloride,
Amphoteric ion polymer is added after room temperature is down to, 24~48h of maintenance is stood after high-speed stirred is scattered, obtains drilling fluid.
, can be with now with the current in drilling process the present invention relates to a kind of application of water-base drilling fluid in drilling process.
Compared with prior art, drilling fluid of the present invention has the following advantages that：
（1）CaCl in water-base drilling fluid of the present invention2Played the role of a nucleus with amphoteric ion polymer, the two synergy plays
Multifunctional effect, including rheological property, vena caval filter, rejection, greasy property etc..The wherein viscosity of amphoteric ion polymer
With CaCl2The increase of content and gradually increase, embody obvious thickening and carry and cuts effect；Due to high content CaCl2Presence, shielding
Internal salt structure in amphoteric ion polymer structure so that contained sulfonic group and ammonium fully expose, and further act on
Native phase, enhance the filtrate reducing ability of system；High content CaCl2Stronger inhibition is respectively provided with amphoteric ion polymer itself
Can, their collaboration make it that the inhibition of system is stronger；The greasy property of system has met or exceeded oil base drilling fluid
It is horizontal；The overall excellent properties of the above are that current water-base drilling fluid is short of.
（2）PS is added to excessive methacrylic acid by amphoteric ion polymer synthetic method of the present invention
In dimethylaminoethyl, excessive dimethylaminoethyl methacrylate acts not only as raw material and participates in reaction, Er Qieneng
Enough play a part of solvent, it is solvent to avoid in conventional method using poisonous acetone, is a kind of green synthetic method.
（3）Amphoteric ion polymer synthetic method of the present invention is by controlling PS (PS) and methacrylic acid
The quality of dimethylamino (DM) when feeding mode, solves PS and dimethylaminoethyl according to normal
When rule method is directly reacted（Generally equimolar is than reaction）, it is impossible to obtain monomer methylacryoyloxyethyl-N, N-
The problem of dimethyl propylene sulfonate (DMAPS).
（4）Amphoteric ion copolymer prepared by the inventive method, because DMAPS is macromolecular polymeric monomer, it is copolymerized
To polymer there is long-chain branch.In aqueous due to the presence of long-chain branch, the steric hindrance of polymer is added, is increased
The hydrodynamic volume of polymer, cause polymer to be affected by temperature the trend of fracture hydrolysis and reduce, so as to improve its heatproof
Performance, heatproof is up to 150 DEG C.
（5）The inventive method prepare amphoteric ion copolymer category in salt form amphoteric ion polymer, with traditional both sexes from
Unlike sub- polymer, it is intermolecular because electrostatic attraction acts in fresh water, shows as strand and curls.And in high salt
In high calcium solution, due to the presence of small molecule salt, intermolecular association is shielded, intermolecular electrostatic attraction is changed
For electrostatic repulsion forces so that strand is more unfolded.Obvious " anti-polyelectrolyte " effect that it is shown makes the property of polymer
Can gradually it strengthen with the increase of salt amount.Can anti-NaCl saturations and CaCl2Saturation, this is current almost all of zwitterion polymerization
The anti-calcium and anti-salt performance that thing does not possess.Also contain substantial amounts of quaternary ammonium in amphoteric ion copolymer structure prepared by the inventive method
Cation group, enable polymer that there is superior shale inhibition.
Embodiment
The effect of the inventive method and effect are illustrated with reference to embodiment, but following examples are not formed to this
The limitation of scheme of the invention.
Embodiment 1
Methylacryoyloxyethyl-N, N- dimethyl propylene sulfonate (DMAPS) is prepared first
Weigh 630gDM to be put into reactor, be then placed in thermostat water bath, heat and start to stir.Weigh again
122gPS, it is added directly into DM, reaction temperature is 35 DEG C, and DMAPS crude product is obtained after stirring reaction 1.5h.By DMAPS
Crude product is transferred in large stretch of filter paper and wrapped, and is positioned in Soxhlet extraction device, the use of ethanol is solvent extraction 1h, and extracting finishes
Filter paper bag is placed in drying box afterwards, is dried at 40 DEG C, finally gives pure DMAPS monomers, yield 92.8%,（Yield
To actually obtain the quality of product and stoichiometrically reacting the obtained ratio of theoretical product quality）.
Comparative example 1（Directly react）
According to stoichiometric proportion DM：PS is 1:1 reaction.Weigh 157gDM to pour into reactor, be then placed in water bath with thermostatic control
In pot, heat and start to stir.122gPS is weighed again, is added directly into DM, and reaction temperature is 20 DEG C, after stirring reaction 0.5h
Mass polymerization product is obtained, without DMAPS monomers, yield 0.Produced during according to stoichiometric reaction, in reaction substantial amounts of
Heat can not disperse in time, and temperature moment steeply rises, and cause raw material DM and product DMAPS all to polymerize.
Comparative example 2（Conventional method, using acetone as solvent reaction）
Weigh 170gDM to pour into reactor, be then placed in thermostat water bath, heat and start to stir.Weigh again
122gPS is dissolved in 1170g acetone, and mixed solution is added directly into DM, and reaction temperature is 60 DEG C, is obtained after stirring reaction 4h
DMAPS crude product.DMAPS crude products are transferred in large stretch of filter paper and wrapped, are positioned in Soxhlet extraction device, use ethanol
For solvent extraction 2h, filter paper bag is placed in drying box after extracting, is dried at 35 DEG C, finally gives pure DMAPS
Monomer, yield 82.4%.
Embodiment 2
100gDMAPS, 60gAM are weighed respectively, and reactor, total monomer are transferred to after adding a certain amount of deionized water dissolving
For 40%.It is passed through N2Deoxygenation 1h, while 65 DEG C are warming up to, 0.5g potassium peroxydisulfates are added after keeping 30min, are coagulated after reacting 6h
Colloidal solid, white depositions are obtained with acetone precipitation.Crushed after drying 24h at 110 DEG C, it is final to obtain DMAPS/AM amphions
Copolymer.
Embodiment 3
130gDMAPS, 60gAM, 10gNaCl are weighed respectively, and reactor is transferred to after adding a certain amount of deionized water dissolving, it is single
Body total concentration is 30%.It is passed through N2Deoxygenation 1h, while 55 DEG C are warming up to, 0.9g ammonium persulfates are added after keeping 30min, react 5h
After obtain gelatinous solid, obtain white depositions with acetone precipitation.Crushed after drying 24h at 110 DEG C, it is final to obtain DMAPS-AM
Amphoteric ion copolymer.
Embodiment 4
350ml running water is weighed first, is added 6g attapulgites, is added 0.8g xanthans after high-speed stirred 10min, continue
High-speed stirred 10min, stand maintenance 2h；Add the anhydrous CaCl of 140g2, stand after high-speed stirred 10min and be cooled to room temperature；Add
Polymer prepared by 7g embodiments 2, high-speed stirred 10min, maintenance 24h is stood, obtains drilling fluid.
Embodiment 5
350ml running water is weighed first, is added 8g calcium-base bentonites, is added 1g welan gums after high-speed stirred 10min, continue
High-speed stirred 10min, stand maintenance 2h；Add the anhydrous CaCl of 200g2, stand after high-speed stirred 10min and be cooled to room temperature；Add
Polymer prepared by 8.5g embodiments 3, high-speed stirred 10min, maintenance 36h is stood, obtains drilling fluid.
Embodiment 6
Same as Example 4, difference is to be free of calcium chloride in drilling fluid.
Embodiment 7
Same as Example 4, difference is the 2wt% that calcium chloride dosage is water consumption in drilling fluid.
Embodiment 8
Same as Example 4, difference is the 5wt% that calcium chloride dosage is water consumption in drilling fluid.
Embodiment 9
Same as Example 4, difference is the 10wt% that calcium chloride dosage is water consumption in drilling fluid.
Embodiment 10
Same as Example 4, difference is the 25wt% that calcium chloride dosage is water consumption in drilling fluid.
Testing performance of drilling fluid：
Testing performance of drilling fluid includes the test of rheological property, vena caval filter, rejection, greasy property, test result
It is shown in Table 1~table 4.Wherein, rheological property is measured using six fast rotation viscometer of ZNN-D6 types, passes through obtained φ 600, φ
300th, each rheological parameter is calculated in φ 6, the data of φ 3；Filter loss is committed a breach of etiquette using the multi-joint middle press filtration of SD-6A types filters with HTHP
Commit a breach of etiquette and be measured, testing time 30min；Rejection is that shale rolls recovery test, and method is：By the shale of certain mass
Add in drilling fluid, aging 16h is rolled at 120 DEG C, take out and reclaimed with 0.42mm standard screens, calculate primary recovery.Recovery
Shale afterwards is positioned in clear water the rolling aging 2h at 120 DEG C, takes out and is reclaimed with 0.42mm standard screens, calculates secondary recovery
Rate；Greasy property is measured using extreme boundary lubrication instrument EP-B and sticking coefficient analyzer NF-2.
The rheological property of table 1
| PV/mPa•s | YP/Pa | Gel/Pa/Pa | Φ6/Φ3 | |
| Embodiment 4 | 29 | 11 | 5/7 | 5/4 |
| Embodiment 5 | 31 | 12 | 5/7 | 5/3 |
| Embodiment 6 | 14 | 3 | 2/2 | 1/1 |
| Embodiment 7 | 17 | 4 | 2/3 | 1/1 |
| Embodiment 8 | 19 | 5 | 2/3 | 2/1 |
| Embodiment 9 | 21 | 6 | 3/4 | 2/1 |
| Embodiment 10 | 25 | 7 | 4/5 | 3/2 |
The vena caval filter of table 2
| API filtration/ml（Normal temperature） | API filtration/ml（120℃） | HTHP filter losses/ml（80℃） | |
| Embodiment 4 | 2.9 | 3.0 | 5 |
| Embodiment 5 | 4.0 | 4.8 | 7.5 |
| Embodiment 6 | 8.6 | 9.0 | 11 |
| Embodiment 7 | 7.5 | 8.0 | 10 |
| Embodiment 8 | 6.5 | 8.0 | 8.5 |
| Embodiment 9 | 6.0 | 6.5 | 7.5 |
| Embodiment 10 | 4.3 | 5.0 | 6.5 |
The rejection of table 3
| Primary recovery/% | Secondary returning yield/% | |
| Embodiment 4 | 100 | 100 |
| Embodiment 5 | 100 | 100 |
| Clear water | 9.8 | -- |
| Embodiment 6 | 92.8 | 89.5 |
| Embodiment 7 | 93.4 | 89.0 |
| Embodiment 8 | 94.9 | 92.1 |
| Embodiment 9 | 95.8 | 92.7 |
| Embodiment 10 | 97.1 | 95.5 |
The greasy property of table 4
| Lubricating coefficient | Filter cake sticking coefficient | |
| Embodiment 4 | 0.077 | 0.00845 |
| Embodiment 5 | 0.045 | 0.02535 |
| Embodiment 6 | 0.122 | 0.1014 |
| Embodiment 7 | 0.108 | 0.0845 |
| Embodiment 8 | 0.103 | 0.0803 |
| Embodiment 9 | 0.087 | 0.0676 |
| Embodiment 10 | 0.080 | 0.0422 |
Claims (18)
1. a kind of water-base drilling fluid, it is characterised in that the drilling fluid includes water, amphoteric ion polymer, anhydrous calcium chloride, soil
Phase, flow pattern regulator, wherein, on the basis of the weight of water, amphoteric ion polymer dosage is the 0.5-5wt% of water consumption, anhydrous
Calcium chloride dosage is the 20-70wt% of water consumption, and native phase dosage is the 0-6wt% of water consumption, and flow pattern regulator dosage is water consumption
0.1-0.4wt%, the amphoteric ion polymer is methylacryoyloxyethyl-N, N- dimethyl propylene sulfonate/propylene
Acid amides bipolymer.
2. according to the water-base drilling fluid described in claim 1, it is characterised in that：On the basis of the weight of water, zwitterion polymerization
Thing dosage is the 1.5-3wt% of water consumption；Anhydrous calcium chloride dosage is the 30-60wt% of water consumption；Native phase dosage is water consumption
1.5-4wt%, flow pattern regulator dosage are the 0.2-0.3wt% of water consumption.
3. according to the water-base drilling fluid described in claim 1, it is characterised in that：The soil is mutually sodium bentonite, calcium base swelling
One or more in soil, attapulgite, sepiolite.
4. according to the water-base drilling fluid described in claim 1, it is characterised in that：The flow pattern regulator is xanthans, guar gum,
One or more in welan gum.
5. according to the water-base drilling fluid described in claim 1, it is characterised in that：The amphoteric ion polymer is as follows
Prepare：（1）Mass ratio is weighed respectively first as 2:1~9:1 dimethylaminoethyl methacrylate and PS,
And PS is added into dimethylaminoethyl methacrylate, then react 0.5 at a temperature of 10~60 DEG C
~4h, last filtered, extracting, dry obtained methylacryoyloxyethyl-N, N- dimethyl propylene sulfonate；（2）According to（4
~2）：（6~8）Mol ratio weigh step respectively（1）Obtained methylacryoyloxyethyl-N, N- dimethyl propylene sulphur
Hydrochlorate and acrylamide, N is passed through after adding solvent dissolving20.5~1h of deoxygenation, while 50~70 DEG C are warming up to, constant temperature 5~
4~6h of initiator for reaction is added after 10min, gelatinous solid is obtained after reaction, white depositions is obtained with acetone precipitation；（3）Will
Step（2）Obtained sediment crushes after drying 16~24h at 100~120 DEG C, obtains amphoteric ion polymer.
6. according to the water-base drilling fluid described in claim 5, it is characterised in that：Step（1）Middle dimethylaminoethyl second
The mass ratio of ester and PS is 2.5:1~8:1.
7. according to the water-base drilling fluid described in claim 5, it is characterised in that：Step（1）Middle PS is added drop-wise to
In dimethylaminoethyl methacrylate or directly disposably it is added in dimethylaminoethyl methacrylate.
8. according to the water-base drilling fluid described in claim 7, it is characterised in that：The methyl weighed during using directly disposable addition
Dimethylaminoethyl acrylate and PS mass ratio are 5.2:1~7.8:1.
9. according to the water-base drilling fluid described in claim 7, it is characterised in that：Using dimethylaminoethyl acrylate methyl ammonia during the mode of dropwise addition
Base ethyl ester and PS mass ratio are 2.5:1~5:1.
10. according to the water-base drilling fluid described in claim 5, it is characterised in that：Step（1）Described in extraction solvent select methanol
Or ethanol, extraction times are 1~3h.
11. according to the water-base drilling fluid described in claim 5, it is characterised in that：Step（2）Described in solvent be deionized water or
Person's salt solution, the NaCl concentration added in the salt solution is 0~0.5mol/L, and total monomer is 20%~40% after adding solvent.
12. according to the water-base drilling fluid described in claim 5, it is characterised in that：Step（2）The middle initiator used is persulfuric acid
Any in potassium, sodium peroxydisulfate, ammonium persulfate, the initiator amount accounts for the 0.3%~0.5% of monomer gross mass.
13. according to the water-base drilling fluid described in claim 1, it is characterised in that：The drilling fluid includes shale control agent, described
Shale control agent dosage is the 0.1-2wt% of water consumption.
14. according to the water-base drilling fluid described in claim 1, it is characterised in that：The drilling fluid includes shale control agent, described
Shale control agent dosage is the 1-2wt% of water consumption.
15. according to the water-base drilling fluid described in claim 13, it is characterised in that：The shale control agent is potassium chloride, sulfuric acid
In potassium, potassium nitrate, ammonium chloride, ammonium sulfate, ammonium nitrate, polyethylene glycol, polypropylene glycol, polyethylene glycol propylene glycol block polymer
It is one or more of.
16. according to the water-base drilling fluid described in claim 1, it is characterised in that：The drilling fluid includes heavy weight additive, the exacerbation
Agent is barite, lime stone, bloodstone, wustite, iron oxide, the one or more in magnesium carbonate, can be according to drilling fluid density
Requirement determine addition.
17. application of the water-base drilling fluid in claim 1 to 16 described in any claim in drilling process.
18. the preparation method of water-base drilling fluid described in any claim in claim 1 to 16, including following content, first
Water, amphoteric ion polymer, anhydrous calcium chloride, native phase, flow pattern regulator are proportionally weighed respectively, and soil is then added into water
Phase, abundant aquation or it is scattered after, add flow pattern regulator, high-speed stirred makes it add anhydrous calcium chloride after fully dissolving, and adds
Temperature rises after anhydrous calcium chloride, and amphoteric ion polymer is added after room temperature is down to, maintenance 24 is stood after high-speed stirred is scattered
~48h, obtains drilling fluid.
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| US11827837B2 (en) | 2019-04-02 | 2023-11-28 | King Fahd University Of Petroleum And Minerals | Water-based drilling, completion, and workover fluid composition with reduced barite sagging |
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| CN106544000A (en) * | 2016-07-13 | 2017-03-29 | 成都菲尔特技术开发有限公司 | A kind of slippery water fracturing fluid |
| CN106278962A (en) * | 2016-08-16 | 2017-01-04 | 黎明职业大学 | A kind of methylacryoyloxyethyl dimethyl propylene ichthyodin and preparation method thereof |
| CN109224884B (en) * | 2018-10-16 | 2021-10-01 | 东莞东阳光科研发有限公司 | Polymer film and preparation method and application thereof |
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