CN1325598C - Microcapsule degelling agent and its preparation method - Google Patents
Microcapsule degelling agent and its preparation method Download PDFInfo
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- CN1325598C CN1325598C CNB200410097105XA CN200410097105A CN1325598C CN 1325598 C CN1325598 C CN 1325598C CN B200410097105X A CNB200410097105X A CN B200410097105XA CN 200410097105 A CN200410097105 A CN 200410097105A CN 1325598 C CN1325598 C CN 1325598C
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- microcapsule degelling
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- 238000002360 preparation method Methods 0.000 title claims abstract description 30
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 20
- 239000003094 microcapsule Substances 0.000 title claims abstract description 20
- 239000002775 capsule Substances 0.000 claims abstract description 42
- 239000007921 spray Substances 0.000 claims abstract description 23
- 239000011230 binding agent Substances 0.000 claims abstract description 15
- JGJLWPGRMCADHB-UHFFFAOYSA-N hypobromite Chemical compound Br[O-] JGJLWPGRMCADHB-UHFFFAOYSA-N 0.000 claims abstract description 10
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 claims abstract description 8
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000654 additive Substances 0.000 claims abstract description 6
- 230000000996 additive effect Effects 0.000 claims abstract description 6
- 239000012286 potassium permanganate Substances 0.000 claims abstract description 5
- JRKICGRDRMAZLK-UHFFFAOYSA-L persulfate group Chemical group S(=O)(=O)([O-])OOS(=O)(=O)[O-] JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 claims abstract description 4
- 239000000243 solution Substances 0.000 claims description 20
- 239000011248 coating agent Substances 0.000 claims description 17
- 238000000576 coating method Methods 0.000 claims description 17
- 239000002216 antistatic agent Substances 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 16
- 230000004888 barrier function Effects 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 8
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 claims description 6
- 239000004925 Acrylic resin Substances 0.000 claims description 6
- 229920000178 Acrylic resin Polymers 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 4
- 239000006229 carbon black Substances 0.000 claims description 2
- 239000004568 cement Substances 0.000 claims description 2
- 235000015110 jellies Nutrition 0.000 claims description 2
- 239000008274 jelly Substances 0.000 claims description 2
- 239000011259 mixed solution Substances 0.000 claims description 2
- 235000013311 vegetables Nutrition 0.000 claims description 2
- 239000011162 core material Substances 0.000 abstract 2
- 239000011247 coating layer Substances 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 241001676635 Lepidorhombus whiffiagonis Species 0.000 description 14
- 230000004907 flux Effects 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 9
- 239000003292 glue Substances 0.000 description 9
- 238000010276 construction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000005538 encapsulation Methods 0.000 description 6
- 238000007906 compression Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 5
- 238000013270 controlled release Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- 239000004160 Ammonium persulphate Substances 0.000 description 4
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 4
- 235000019395 ammonium persulphate Nutrition 0.000 description 4
- 208000027418 Wounds and injury Diseases 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000000499 gel Substances 0.000 description 3
- 208000014674 injury Diseases 0.000 description 3
- 239000004159 Potassium persulphate Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 2
- 235000019394 potassium persulphate Nutrition 0.000 description 2
- 230000001603 reducing effect Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 244000241257 Cucumis melo Species 0.000 description 1
- 235000015510 Cucumis melo subsp melo Nutrition 0.000 description 1
- 229920002907 Guar gum Polymers 0.000 description 1
- FJJCIZWZNKZHII-UHFFFAOYSA-N [4,6-bis(cyanoamino)-1,3,5-triazin-2-yl]cyanamide Chemical compound N#CNC1=NC(NC#N)=NC(NC#N)=N1 FJJCIZWZNKZHII-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000009881 electrostatic interaction Effects 0.000 description 1
- 239000000665 guar gum Substances 0.000 description 1
- 229960002154 guar gum Drugs 0.000 description 1
- 235000010417 guar gum Nutrition 0.000 description 1
- 229920013818 hydroxypropyl guar gum Polymers 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 238000013268 sustained release Methods 0.000 description 1
- 239000012730 sustained-release form Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/70—Compositions for forming crevices or fractures characterised by their form or by the form of their components, e.g. foams
- C09K8/706—Encapsulated breakers
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing Of Micro-Capsules (AREA)
- Medicinal Preparation (AREA)
Abstract
The present invention discloses a microcapsule degelling agent and a preparation method thereof. The microcapsule degelling agent contains 85.5 to 91.2 wt% of capsule core material, 8 to 13 wt% of coating layer and 0.8 to 1.5 wt% of additive. The capsule core material contains persulphate, hypochlorite, hypobromite, potassium permanganate, potassium dichromate or combination of persulphate, hypochlorite, hypobromite, potassium permanganate and potassium dichromate. The preparation method comprises the following technical steps: raw materials are added into a side spray fluidized bed, binding agent solution is added, the side spray fluidized bed is turned on, etc., and the microcapsule degelling agent is prepared. The covered rate of a product can reach more than 99.8%, and the content of effective components can reach 90%. Simultaneously, within the range of 10 to 30 Mpa, the appropriate compressive strength for the product can be selected according to the closing pressure of different strata.
Description
Technical field
The present invention relates to the oil field with broken glue technology, in particular for the microcapsule degelling agent technology in the fracturing liquid.
Background technology
Oil-field development is to the middle and later periods, and waterfrac treatment is one of the most effective well stimulation, and capsule breaker plays the effect that makes the crosslinked and broken glue ability of fracturing liquid united and coordinating in measure is implemented.
Present widely used conventional gel breaker in the construction, all be by with the fracturing liquid hybrid reaction, destroy crosslinked condition and the degradation polymer macromole reaches brokenly the glue viscosity reducing effect.Gel breaker directly is dissolved in the fracturing liquid, and release rate is fast, and to the liquid properties influence greatly: excessive or constant adds, and cross-linking properties may occur and reduce rapidly, breaks glue in advance, causes the sand plug of constructing; The amount of owing adds, and gelled fracturing fluid may break the bad even broken glue of glue, will cause serious secondary injury to reservoir, causes easily that also the stratum tells sand, influences construction effect greatly.Capsule breaker relies on its good slow release, controlled-release function well to solve this problem.
Capsule breaker have good slow release, a controlled release properties.In the construction process, the capsule breaker of excessive adding is because its slow releasing function makes fracturing liquid keep better performance; After construction finishes, crack closure, capsule clothing slowly-releasing reaches distortion under reservoir stress, breaks, and capsule heart effective constituent discharges in a large number, makes fracturing liquid rapidly, thoroughly break glue, has improved the of the fracturing fluid row of returning and has led, and reduces the secondary injury to the stratum.Capsule breaker had both increased the stability of construction, had improved the validity of construction again.
Existing capsule breaker product mostly is two-layered coating, and is impervious material substantially, and bed thickness then slow-release time is long, and layer is thin, and then encapsulation ratio is low, is difficult for grasping its performance; And capsule breaker of the present invention is three layers of dressing: slow release layer, impervious barrier, supporting layer.The slow release layer of product, impervious barrier provide the good slow release ability, and the hardness by supporting layer, fragility is the ultimate compression strength of may command product again, makes product have good controlled-release function.Preparation technology's main body that currently available products adopts mostly is coating pan or similar technology, the top whitewashing, this kind technology is subjected to the influence of pot body rotating speed and whitewashing mode, product degree of sphericity low (coating effect will be given a discount), the product skin that obtains is loose, encapsulation ratio is 95～98% only, and sustained release performance is wayward.Adopting process of the present invention is the granulation of side jet flow, end jet flow dressing, whitewashing and particle motion basically identical, and bed body employing frequency conversion control speed, and the particle degree of sphericity height that obtains, coating effect is good, the controllability height.
Technology contents
The purpose of this invention is to provide a kind of microcapsule degelling agent and preparation technology thereof, under the prerequisite of the prop-carrying capacity of not losing fracturing fluid gel, in the excessive adding fracturing liquid, make its broken glue more thorough, and the timely row of returning, reducing secondary injury to the stratum, the raising measure is efficient.
Microcapsule degelling agent of the present invention comprises capsule heartwood material, coating and additive, its weight ratio is 85.5～91.2%:8～13%:0.8～1.5%, and capsule heartwood material package is drawn together one-component or its combination of persulphate, hypochlorite, hypobromite, potassium permanganate, potassium bichromate.The particle diameter of capsule heartwood material is 0.2～0.45mm, and its size-grade distribution value is narrow, and granularity is thinner, be more evenly distributed, and helps the raising of encapsulation ratio and ultimate compression strength, the controllability of the product performance that improve from capsule heart selection aspect.
Its coating is divided into three parts, i.e. slow release layer, impervious barrier and supporting layer.Wherein, supporting layer is by the acrylonitritrile-styrene resin preparation, and slow release layer is by the acrylic resin preparation, and impervious barrier is by poly-asymmetric Ethylene Dichloride preparation.
Its additive comprises binding agent, antistatic agent, increases crisp dose, and total content is 0.8～1.5%, directly is mixed during use in coating liquid, improves the parcel quality.Binding agent is vegetable jelly (as a guar gum) or derivatives thereof, consumption 2～4 ‰, and its effect is to improve weighting material viscosity degree when preparation capsule bulbus cordis grain; Antistatic agent is white carbon black or talcum powder, consumption 3～6 ‰, and its effect is to reduce the poly-heap phenomenon that is produced by electrostatic interaction in the preparation process; Increase crisp dose and be cement, consumption 3～5 ‰, the releasing degree with regulating product can effectively break product under locking pressure, discharge capsule heart composition.
The preparation method of microcapsule degelling agent of the present invention is:
(1) getting some amount joins in the side spray fluidized-bed through the capsule heart particle of the 0.20-0.45mm of screen analysis;
(2) binder solution of adding 2 ‰ in liquid supply vehicle, the ratio in 1% adds capsule heartwood material;
(3) open side spray fluidized-bed sprays to the binding agent mixed solution on the capsule heart particle after the screen analysis by spray gun; This process continued to capsule bulbus cordis grain length to 0.7mm;
(4) preparation slow release layer dressing solution:, add antistatic agent with the dissolve with ethanol acrylic resin;
(5) open end spray fluidized-bed, slow release layer all is sprayed on the capsule bulbus cordis grain;
(6) preparation impervious barrier dressing solution:, add antistatic agent with the poly-asymmetric Ethylene Dichloride of pimelinketone dissolving;
(7) spraying impervious barrier coating liquid on capsule bulbus cordis grain;
(8) preparation supporting layer solution: acrylonitritrile-styrene resin is dissolved in the pimelinketone, adds antistatic agent, increase crisp dose;
(9) to capsule bulbus cordis grain spraying supporting layer.
Device parameter in the preparation process is as follows:
The A pelletization:
Side spray fluidized-bed rotating speed: 55～75rpm
Angle: level
Temperature: room temperature
Whitewashing flow: 20～30ml/min
Whiff pressure: 0.15～0.35Mpa
Air blast flux: 300～600l/min
B dressing process:
Air blast flux: 300～600l/min
Angle: vertical
Temperature: 38-50 ℃
Whitewashing flow: 35～70ml/min
Whiff pressure: 0.25～0.5Mpa
The present invention proposes the preparation technology of side spray fluidized bed granulation, end spray fluidized bed coating, film controlled release and framework controlled release association mechanism, four-layer structure: the capsule heart, slow release layer, impervious barrier and supporting layer are adopted in the release of product effective constituent.The product encapsulation ratio can reach more than 99.8%, and active constituent content can reach 90%, in 10～30Mpa scope, can select suitable product ultimate compression strength according to the Different Strata locking pressure simultaneously.
Embodiment
Embodiment 1
(1) getting the 2Kg particle diameter is that the ammonium persulphate particle of 0.20-0.45mm joins in the side spray fluidized-bed;
(2) preparation 4L binder solution (melon glue+4L water of 6g) adds 40g ammonium persulphate pulvis;
(3) open side spray fluidized-bed is regulated rotating speed 55rpm, and the whitewashing flow is 20ml/min, whiff pressure 0.20Mpa, and air blast flux: 400L/min sprays to binding agent on the ammonium persulphate particle; When binder solution was sprayed onto 3.6L, the raising rotating speed was 70rpm, whitewashing flow 25ml/min, whiff pressure 0.25Mpa;
(4) preparation slow release layer solution:, add 3g antistatic agent talcum powder with 5L dissolve with ethanol 90g acrylic resin;
(5) open end spray fluidized-bed, air blast flux: 450L/min, 40 ℃ of temperature, whitewashing flow 40ml/min, whiff pressure 0.25Mpa is sprayed into the slow release layer coating liquid on the capsule bulbus cordis grain;
(6) preparation impervious barrier solution:, add the 3g antistatic agent with the poly-asymmetric Ethylene Dichloride of 10L pimelinketone dissolving 60g;
(7) air blast flux: 450L/min, 45 ℃ of temperature, whitewashing flow 40ml/min, whiff pressure 0.25Mpa, spraying impervious barrier coating liquid on capsule bulbus cordis grain;
(8) preparation supporting layer solution: with 10L pimelinketone dissolving 50g acrylonitritrile-styrene resin, adding 5g antistatic agent talcum powder, 8g increase crisp dose;
(9) air blast flux: 520L/min, 45 ℃ of temperature, whitewashing flow 45ml/min, whiff pressure 0.3Mpa is to capsule bulbus cordis grain spraying supporting layer; When supporting layer solution was sprayed onto 9.8L, regulating the whitewashing flow was 60ml/min, whiff pressure 0.4Mpa.Dry fully until product.
Product encapsulation ratio 99.9%, ultimate compression strength 20Mpa can be used in the waterfrac treatment measure of middle hot hole section.
Embodiment 2
(1) getting Potassium Persulphate particle and the 1Kg Losantin powder that the 1Kg particle diameter is 0.20-0.45mm joins in the side spray fluidized-bed;
(2) preparation 4L binder solution (hydroxypropyl guar gum of 5g+4L water) adds 40g ammonium persulphate pulvis;
(3) open side spray fluidized-bed is regulated rotating speed 60rpm, and the whitewashing flow is 23ml/min, whiff pressure 0.22Mpa, and air blast flux: 400L/min sprays to binding agent on the Potassium Persulphate particle; When binder solution was sprayed onto 3.6L, the raising rotating speed was 70rpm, whitewashing flow 28ml/min, whiff pressure 0.25Mpa;
(4) preparation slow release layer solution:, add the 3g antistatic agent with 5L dissolve with ethanol 110g acrylic resin;
(5) open end spray fluidized-bed, air blast flux: 450L/min, 41 ℃ of temperature, whitewashing flow 38ml/min, whiff pressure 0.25Mpa is sprayed into the slow release layer coating liquid on the capsule bulbus cordis grain;
(6) preparation impervious barrier solution:, add the 3g antistatic agent with the poly-asymmetric Ethylene Dichloride of 10L pimelinketone dissolving 40g;
(7) air blast flux: 450L/min, 45 ℃ of temperature, whitewashing flow 42ml/min, whiff pressure 0.27Mpa, spraying impervious barrier coating liquid on capsule bulbus cordis grain;
(8) preparation supporting layer solution: with 10L pimelinketone dissolving 35g acrylonitritrile-styrene resin, adding 4g antistatic agent, 10g increase crisp dose;
(9) air blast flux: 520L/min, 45 ℃ of temperature, whitewashing flow 48ml/min, whiff pressure 0.35Mpa is to capsule bulbus cordis grain spraying supporting layer; When supporting layer solution was sprayed onto 9.8L, regulating the whitewashing flow was 65ml/min, whiff pressure 0.4Mpa.Dry fully until product.
Product encapsulation ratio 99.8%, ultimate compression strength 13Mpa can be used in the waterfrac treatment measure of low hot-well section.
Claims (11)
1 one kinds of microcapsule degelling agents, comprise capsule heartwood material, coating and additive, its weight ratio is a capsule heartwood material: coating: additive is 85.5%～91.2%:8%～13%:0.8%～1.5%, and capsule heartwood material package is drawn together the one-component of the combination of persulphate, hypochlorite, hypobromite, potassium permanganate, potassium bichromate or oxymuriate, hypobromite, potassium permanganate, potassium bichromate.
The 2 described microcapsule degelling agents according to claim 1, the granularity of its capsule heartwood material is 0.2～0.45mm.
3 microcapsule degelling agents according to claim 1, described coating are three layers, i.e. supporting layer, slow release layer and impervious barrier.
4 microcapsule degelling agents according to claim 3, described supporting layer is prepared by acrylonitritrile-styrene resin.
5 microcapsule degelling agents according to claim 3, described slow release layer is by poly-asymmetric Ethylene Dichloride preparation.
6 microcapsule degelling agents according to claim 3, described impervious barrier is prepared by acrylic resin.
7 microcapsule degelling agents according to claim 1, described additive comprise binding agent, antistatic agent, increase crisp dose, and total content is 0.8%～1.5%.
8 microcapsule degelling agents according to claim 7, binding agent wherein are the vegetable jelly or derivatives thereof, and consumption is 2 ‰～4 ‰.
9 microcapsule degelling agents according to claim 7, antistatic agent wherein are talcum powder, consumption 3 ‰～6 ‰.
10 microcapsule degelling agents according to claim 7, wherein increase crisp dose for cement or white carbon black, consumption 3 ‰～5 ‰.
The preparation method of 11 1 kinds of microcapsule degelling agents as claimed in claim 1:
(1) getting some amount joins in the side spray fluidized-bed through the capsule heart particle of the 0.20-0.45mm of screen analysis;
(2) in reservoir, add a certain proportion of binder solution, add capsule heartwood material more by a certain percentage;
(3) open side spray fluidized-bed sprays to the binding agent mixed solution on the capsule heart particle after the screen analysis by spray gun; This process continued to capsule bulbus cordis grain length to 0.7mm;
(4) preparation slow release layer dressing solution:, add antistatic agent with the dissolve with ethanol acrylic resin;
(5) open end spray fluidized-bed, slow release layer all is sprayed on the capsule bulbus cordis grain;
(6) preparation impervious barrier dressing solution:, add antistatic agent with the poly-asymmetric Ethylene Dichloride of pimelinketone dissolving;
(7) spraying impervious barrier coating liquid on capsule bulbus cordis grain;
(8) preparation supporting layer solution: acrylonitritrile-styrene resin is dissolved in the pimelinketone, adds antistatic agent, increase crisp dose;
(9) to capsule bulbus cordis grain spraying supporting layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410097105XA CN1325598C (en) | 2004-12-09 | 2004-12-09 | Microcapsule degelling agent and its preparation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410097105XA CN1325598C (en) | 2004-12-09 | 2004-12-09 | Microcapsule degelling agent and its preparation method |
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| CN1786101A CN1786101A (en) | 2006-06-14 |
| CN1325598C true CN1325598C (en) | 2007-07-11 |
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| CNB200410097105XA Expired - Fee Related CN1325598C (en) | 2004-12-09 | 2004-12-09 | Microcapsule degelling agent and its preparation method |
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| CN102627959B (en) * | 2012-03-26 | 2013-10-09 | 中国石油化工股份有限公司 | Gel breaker microcapsule controlled to release concentratedly in 2-3 h and preparation method thereof |
| CN102627958B (en) * | 2012-03-26 | 2013-10-09 | 中国石油化工股份有限公司 | Efficient microcapsule gel breaker and preparation method thereof |
| US10000681B2 (en) | 2012-12-21 | 2018-06-19 | Halliburton Energy Services, Inc. | Hollow hydrogel capsules and methods of using the same |
| CN105860952B (en) * | 2016-03-26 | 2018-10-23 | 北京化工大学 | A kind of processing method of gel breaker |
| CN106223923B (en) * | 2016-10-17 | 2019-03-19 | 平安煤炭开采工程技术研究院有限责任公司 | Coal bed fracturing method |
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| CN106522880A (en) * | 2016-11-17 | 2017-03-22 | 烟台智本知识产权运营管理有限公司 | Controllable temporary plugging method applied during water plugging and profile control conducted through gel plugging agent |
| CN108822816A (en) * | 2018-06-25 | 2018-11-16 | 中国石油集团渤海钻探工程有限公司 | A kind of molten GEL USED FOR PLUGGING WELL LOST CIRCULATION of loose sand theobromine and preparation method thereof |
| CN109319913B (en) * | 2018-10-11 | 2022-07-01 | 仲恺农业工程学院 | Slow-release potassium hydrogen persulfate preparation and preparation method thereof |
| CN116426262A (en) * | 2022-01-04 | 2023-07-14 | 中国石油天然气股份有限公司 | Delayed gel breaker with double-shell structure and preparation method thereof |
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- 2004-12-09 CN CNB200410097105XA patent/CN1325598C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1303463A (en) * | 1998-05-29 | 2001-07-11 | 3M创新有限公司 | Encapsulated breaker slurry compositions and methods of use |
Non-Patent Citations (1)
| Title |
|---|
| 石油钻采工艺 刘建权，55页1.2节，中温胶囊过破胶技术 2004 * |
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| CN1786101A (en) | 2006-06-14 |
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