CN112745819A - Degradable temporary plugging agent and preparation method thereof - Google Patents
Degradable temporary plugging agent and preparation method thereof Download PDFInfo
- Publication number
- CN112745819A CN112745819A CN202110159979.7A CN202110159979A CN112745819A CN 112745819 A CN112745819 A CN 112745819A CN 202110159979 A CN202110159979 A CN 202110159979A CN 112745819 A CN112745819 A CN 112745819A
- Authority
- CN
- China
- Prior art keywords
- plugging agent
- temporary plugging
- polyester material
- degradable
- polyglycolide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/5086—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Biological Depolymerization Polymers (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a degradable temporary plugging agent and a preparation method and application thereof, relating to the technical field of oil and gas development; the temporary plugging agent comprises a polyester material and inorganic nanoparticles added in the polyester material, wherein the addition amount of the inorganic nanoparticles in the polyester material is 1-5%. The invention also discloses a preparation method of the degradable temporary plugging agent, which is to melt, blend and mold the polyester material and the inorganic nano-particles to obtain temporary plugging agent particles with the particle size of 286.3-525.7 microns. The degradable temporary plugging agent disclosed by the invention is prepared by dispersing inorganic nanoparticles into a polyester material, so that the temporary plugging agent which is strong in plugging capability, rapid in plugging removal and free from environmental pollution is formed.
Description
Technical Field
The invention belongs to the technical field of oil and gas development, and particularly relates to a degradable temporary plugging agent and a preparation method thereof.
Background
After the water injection oil well enters the middle and later stages of development, the comprehensive water content of the oil field rises, a part of main oil layers are completely flooded, and relatively low-permeability oil layers with higher oil saturation cannot be used, so that the development difficulty of the oil field is increased, and the comprehensive water content rises rapidly. In order to reduce the water content of the oil well and provide recovery from the oil field, the prior art generally adopts two methods of selectively plugging a high permeability zone and directing a development destination layer to a low permeability layer to increase the oil production.
In the well killing, well washing, acidizing and well drilling processes, because the bottom layer has heterogeneity, the treatment fluid preferentially enters a high permeable layer or a large crack with relatively small resistance, so that the oil layer is greatly damaged. Therefore, temporary plugging by using a temporary plugging agent is needed before operation and construction, so that the leakage of working fluid can be effectively reduced, and the effect of protecting an oil-gas reservoir is achieved. The jelly formed by the temporary plugging agent has strong plugging capability, so that other working fluids cannot enter the stratum, and the purpose of temporary plugging is achieved. After the operation is finished, the gel breaks and scratches water, and the blockage is automatically removed, so that the oil well recovers the capacity, and the purpose of protecting the oil-gas layer is achieved.
The temporary plugging agent has the characteristics of plugging and plugging removal materials. Firstly, the gel strength is required to be achieved during plugging, sandstone and stratum with different pores are required to be plugged in a relatively short time, and the gel needs to be rapidly expanded underground to fill the pores so as to plug liquid flow; after plugging, the material is gradually degraded to slowly become flowable liquid, the pores of the stratum can be recovered under the action of pressure, and neither the material gel nor the material liquefy the stratum is polluted, so that the development of a proper temporary plugging agent has important significance for the recovery ratio of the oil field.
Disclosure of Invention
The invention provides a degradable temporary plugging agent aiming at the problems that the plugging capability of the conventional temporary plugging agent is strong, the deblocking speed cannot be achieved simultaneously, and the environmental pollution is serious.
The invention also discloses a preparation method of the degradable temporary plugging agent, which is simple and easy to popularize and use.
The specific technical scheme of the invention is as follows: the degradable temporary plugging agent comprises a polyester material and inorganic nanoparticles added in the polyester material, wherein the addition amount of the inorganic nanoparticles in the polyester material is 1-5%.
In the technical scheme, the inorganic nanoparticles are added into the polyester material through melting and blending and are used as a dispersed phase and a catalyst in the copolymerization process of the polyester material to form the degradable copolyester inorganic nanoparticle composite temporary plugging agent, wherein the selected polyester material has good degradability, and the nanoparticles with good reinforcing property and strong environmental friendliness are selected, so that the composite temporary plugging agent can better cope with the conditions of complex strata.
Further, the polyester material is at least two of polylactic acid ester, polyglycolide and polybutylene succinate. The molecular weight of the polylactic acid ester adopted in the polyester material is 40000-65000; the molecular weight of the polyglycolide is 2500-5000; the molecular weight of the poly (butylene succinate) is 28600-75500.
The polyester material is polylactic acid ester with the mass ratio of 5-7: 1-3, is a novel environment-friendly material, has good biodegradability, biocompatibility and absorbability, and can be recycled from raw materials to wastes; polyglycolide has no toxicity and good biocompatibility, the intermediate product of hydrolysis is glycolic acid, and the final products are carbon dioxide and water which meet the requirement of environmental protection; the poly (butylene succinate) is a novel aliphatic biodegradable polyester material, has low price, good physical and mechanical properties, easy processing and forming and the like. Preferably, the mass ratio of the polylactic acid ester to the polyglycolide to the polybutylene succinate is as follows: 3:1:1, and the polyester material obtained in the proportion has the best water absorption swelling performance which can reach 39 times.
Further, the inorganic nano-particles are at least one of nano-silicon dioxide, nano-titanium dioxide and nano-zirconium dioxide, preferably nano-titanium dioxide, and have good dispersibility and weather resistance and no biotoxicity. .
Further, the particle size of the inorganic nano-particles is 27nm to 143 nm.
The invention also discloses a preparation method of the degradable temporary plugging agent, which is mainly to melt, blend and form the polyester material and the inorganic nano-particles to obtain temporary plugging agent particles with the particle size of 286.3-525.7 microns.
The preparation method specifically comprises the following steps:
s1: preparation of polyester Material
Selecting at least two of polylactic acid ester, polyglycolide and polybutylene succinate, and mixing uniformly in advance according to a formula;
s2: melting and blending the polyester material and the inorganic nano particles;
s3: the polyester material was processed to melt using a two-roll mixer and the nanoparticles were sprinkled evenly between the two rolls during melting.
S4: and forming the cooled temporary plugging agent by using a ball mill.
Further, the S2 specifically includes the following steps:
s21: and opening the double-roller mixing mill, setting the rotating speed to be 10-25 r/min, setting the temperature, and placing the polyester material on a double roller after the set temperature is reached.
S22: the nanoparticles prepared in advance were slowly and uniformly sprinkled between the twin rolls in the molten state of the polyester material.
Further, in the step S22, the polyester material is processed by a two-roll mixing mill and is open-milled for 0.5 to 2.5 hours at the temperature of 180 to 240 ℃, and after the nano particles are uniformly sprinkled between two rolls, the polyester material is cooled;
further, in S3: and (4) setting the rotating speed of a ball milling barrel to be 200-500 r/min by using a ball mill to ball mill and form the cooled temporary plugging agent.
Further, in the S3, the temporary plugging agent is shaped into particles of 286.3 μm to 525.7 μm by ball mill pulverization after cooling.
The invention provides a degradable temporary plugging agent which has strong plugging capability, quick unblocking and serious environmental pollution, and is dispersed into a polyester material by adopting inorganic nano particles through a melt blending method.
The degradable temporary plugging agent disclosed by the invention adopts at least two polyester materials to form a copolymer, and the polylactic acid ester is a novel environment-friendly material, has good biodegradability, biocompatibility and absorbability, and can be recycled from raw materials to wastes; polyglycolide has no toxicity and good biocompatibility, the intermediate product of hydrolysis is glycolic acid, and the final products are carbon dioxide and water which meet the requirement of environmental protection; the poly (butylene succinate) is a novel aliphatic biodegradable polyester material, has low price, good physical and mechanical properties, easy processing and forming and the like.
The invention also discloses a method for preparing the degradable temporary plugging agent by melt blending, no solvent or additive is added, compared with the traditional solvent method, the method has the advantages of simple process and short processing time, and the prepared reagent can be directly used in engineering.
The viscosity of the degradable temporary plugging agent disclosed by the invention can reach 79 mPa.s, the expansion multiple can reach 32 times, the temporary plugging strength can reach 7.9kPa, and the degradation rate can reach 98.3% at the temperature of 100 ℃.
Detailed Description
Example 1
The present embodiment prepares a degradable temporary plugging agent, and the formula thereof comprises the following components by mass: 70% of polylactic acid ester, 29% of polyglycolide and 1% of nano silicon dioxide.
The specific preparation method comprises the following steps:
s1: preparation of polyester Material
Weighing polylactic acid ester and polyglycolide according to the formula, and mixing uniformly in advance according to the formula.
S21: the two-roll mixer was switched on, the temperature set at 240 ℃ and, after reaching the set temperature, the polyester material was open-milled on two rolls at 15 r/min.
S22: slowly and uniformly sprinkling the prepared nano particles between two rollers in a molten state of the polyester material; stopping mixing after mixing for 1.5h, and cooling;
s3: after cooling, the temporary plugging agent is crushed into temporary plugging agent powder A by setting the rotating speed of a ball milling tank to be 300r/min and using a ball mill, and the particle size D50 is as follows: 347.5 μm.
Example 2
The present embodiment prepares a degradable temporary plugging agent, and the formula thereof comprises the following components by mass: 68% of polylactic acid ester, 27% of polyglycolide and 5% of nano silicon dioxide.
The specific preparation method comprises the following steps:
s1: preparation of polyester Material
Weighing polylactic acid ester and polyglycolide according to the formula, and mixing uniformly in advance according to the formula.
S21: the two-roll mixer was turned on, the temperature set at 240 ℃ and, after reaching the set temperature, the polyester material was scoured on two rolls for 1.5h at 15 r/min.
S22: slowly and uniformly sprinkling the prepared nano particles between two rollers in a molten state of the polyester material; stopping mixing after mixing for 1.5h, and cooling;
s3: after cooling, the temporary plugging agent is crushed into temporary plugging agent powder A by setting the rotating speed of a ball milling tank to be 300r/min and using a ball mill, and the particle size D50 is as follows: 342.7 μm.
Example 3
The present embodiment prepares a degradable temporary plugging agent, and the formula thereof comprises the following components by mass: 65% of polylactic acid ester, 32% of polyglycolide and 3% of nano silicon dioxide.
The specific preparation method comprises the following steps:
s1: preparation of polyester Material
Weighing polylactic acid ester and polyglycolide according to the formula, and mixing uniformly in advance according to the formula.
S21: the two-roll mixer was turned on, the temperature set at 240 ℃ and, after reaching the set temperature, the polyester material was scoured on two rolls for 1.5h at 15 r/min.
S22: slowly and uniformly sprinkling the prepared nano particles between two rollers in a molten state of the polyester material; stopping mixing after mixing for 1.5h, and cooling;
s3: after cooling, the temporary plugging agent is crushed into temporary plugging agent powder A by setting the rotating speed of a ball milling tank to be 300r/min and using a ball mill, and the particle size D50 is as follows: 328.1 μm.
Example 4
The present embodiment prepares a degradable temporary plugging agent, and the formula thereof comprises the following components by mass: the formula comprises the following components in percentage by mass: 57.6 percent of polylactic acid ester, 19.2 percent of polyglycolide, 19.2 percent of polybutylene succinate, 2 percent of nano silicon dioxide and 2 percent of nano titanium dioxide.
The specific preparation method comprises the following steps:
s1: preparation of polyester Material
Weighing polylactic acid ester and polyglycolide according to the formula, and mixing uniformly in advance according to the formula.
S21: the two-roll mixer was turned on, the temperature set at 180 ℃ was reached, and after the set temperature was reached, the polyester material was scoured on the two rolls at 10r/min for 0.5 h.
S22: slowly and uniformly sprinkling the prepared nano particles between two rollers in a molten state of the polyester material; stopping mixing after 0.5h of mixing, and cooling; s3: the polyester material was processed to melt using a two-roll mixer and the nanoparticles were sprinkled evenly between the two rolls during melting.
S3: after cooling, the temporary plugging agent is crushed into temporary plugging agent powder A by setting the rotating speed of a ball milling tank to be 200r/min and using a ball mill, and the particle size D50 is as follows: 525.7 μm.
Example 5
The present embodiment prepares a degradable temporary plugging agent, and the formula thereof comprises the following components by mass: the formula comprises the following components in percentage by mass: 57.6 percent of polylactic acid ester, 19.2 percent of polyglycolide, 19.2 percent of polybutylene succinate, 2 percent of nano silicon dioxide and 2 percent of nano titanium dioxide.
The specific preparation method comprises the following steps:
s1: preparation of polyester Material
Weighing polylactic acid ester and polyglycolide according to the formula, and mixing uniformly in advance according to the formula.
S21: the two-roll mixer was turned on, the temperature set at 240 ℃ was reached, and after the set temperature was reached, the polyester material was slit on the two rolls at 25r/min for 2.5 h.
S22: slowly and uniformly sprinkling the prepared nano particles between two rollers in a molten state of the polyester material; stopping mixing after 2.5h of mixing, and cooling;
s4: after cooling, the temporary plugging agent is crushed into temporary plugging agent powder A by setting the rotating speed of a ball milling tank to be 500r/min and using a ball mill, and the particle size D50 is as follows: 286.3 μm.
Example 6
The present embodiment prepares a degradable temporary plugging agent, and the formula thereof comprises the following components by mass: the formula comprises the following components in percentage by mass: 57.6 percent of polylactic acid ester, 19.2 percent of polyglycolide, 19.2 percent of polybutylene succinate, 2 percent of nano silicon dioxide and 2 percent of nano titanium dioxide.
The specific preparation method comprises the following steps:
s1: preparation of polyester Material
Weighing polylactic acid ester and polyglycolide according to the formula, and mixing uniformly in advance according to the formula.
S21: the two-roll mixer was turned on, the temperature set at 220 ℃ and, after reaching the set temperature, the polyester material was slit on the two rolls at 20r/min for 2 h.
S22: slowly and uniformly sprinkling the prepared nano particles between two rollers in a molten state of the polyester material; stopping mixing after mixing for 2h, and cooling;
s3: after cooling, the temporary plugging agent is crushed into temporary plugging agent powder A by setting the rotating speed of a ball milling tank to be 350r/min and using a ball mill, and the particle size D50 is as follows: 315.9 μm.
Comparative example 1
The polyester material was selected only from polylactic acid ester, and the amounts of other components added and the production method were substantially the same as in example 6, to obtain comparative sample 1.
Comparative example 2
Comparative sample 2 was obtained according to the formulation in example 6, using nanosilica as nanoparticles.
Respectively measuring the viscosity at 80 ℃ of products A to F obtained in examples 1 to 6 and comparative examples 1 to 2 and comparative samples 1 to 2; and measuring the expansion times and the compressive strengths of the products A to F and the comparison samples 1 to 2 and the final degradation rate at 100 ℃ at room temperature; the test results are as follows:
from the evaluation results, the viscosity of the temporary plugging agent prepared by the application document can reach 1248.6 mPa.S, the expansion multiple can reach 38 times, the temporary plugging strength can reach 33MPa, the degradation rate at 100 ℃ can reach 99.3%, the plugging capability is strong, the plugging removal is rapid, and the polyester material can be decomposed into small molecular compounds which can be absorbed by the environment after the plugging removal, so that the environment is not polluted.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.
Claims (9)
1. The degradable temporary plugging agent is characterized by comprising a polyester material and inorganic nanoparticles added in the polyester material, wherein the addition amount of the inorganic nanoparticles in the polyester material is 1-5%.
2. The degradable temporary plugging agent according to claim 1, wherein said polyester material is at least two of polylactic acid ester, polyglycolide and polybutylene succinate.
3. The degradable temporary plugging agent according to claim 2, wherein the polyester material is polylactic acid ester, polyglycolide and polybutylene succinate in a mass ratio of 5-7: 1-3.
4. The degradable temporary plugging agent according to claim 3, wherein the molecular weight of the polylactic acid ester is 40000-65000; the molecular weight of the polyglycolide is 2500-5000; the molecular weight of the poly (butylene succinate) is 28600-75500.
5. The degradable temporary plugging agent according to claim 1, wherein the inorganic nanoparticles are at least one of nano silicon dioxide, nano titanium dioxide and nano zirconium dioxide.
6. The degradable temporary plugging agent of claim 5, wherein said inorganic nanoparticles have a particle size of 0.850 μm to 5.251 μm.
7. A preparation method of a degradable temporary plugging agent is characterized in that the temporary plugging agent is prepared by melting, blending and molding a polyester material and inorganic nanoparticles according to the formula of the temporary plugging agent disclosed by any one of claims 1-5.
8. The method of claim 7, comprising the steps of:
s1: preparation of polyester Material
Selecting at least two of polylactic acid ester, polyglycolide and polybutylene succinate, and mixing uniformly in advance according to a formula;
s2: melting and blending the polyester material and the inorganic nano particles;
processing the polyester material by a double-roller mixing roll, open-milling for 0.5-2.5 h at the temperature of 180-240 ℃, uniformly spraying the nano particles between the double rollers, and cooling after milling;
s3: and (4) setting the rotating speed of a ball milling barrel to be 200-500 r/min by using a ball mill to ball mill and form the cooled temporary plugging agent.
9. The production method according to claim 8, wherein in S3, the temporary plugging agent is formed into particles of 286.3 μm to 525.7 μm by ball mill pulverization after cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110159979.7A CN112745819B (en) | 2021-02-05 | 2021-02-05 | Degradable temporary plugging agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110159979.7A CN112745819B (en) | 2021-02-05 | 2021-02-05 | Degradable temporary plugging agent and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112745819A true CN112745819A (en) | 2021-05-04 |
| CN112745819B CN112745819B (en) | 2022-04-22 |
Family
ID=75651858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110159979.7A Active CN112745819B (en) | 2021-02-05 | 2021-02-05 | Degradable temporary plugging agent and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112745819B (en) |
Citations (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070197738A1 (en) * | 2006-01-20 | 2007-08-23 | Deepak Ramaraju | Process for making polyesters |
| CN101314666A (en) * | 2007-06-01 | 2008-12-03 | 东丽纤维研究所（中国）有限公司 | Polylactic acid blend and uses thereof |
| US20080315453A1 (en) * | 2007-06-22 | 2008-12-25 | Michael Joseph Molitor | Process for the production of polyester nanocomposites |
| CN101735583A (en) * | 2009-12-15 | 2010-06-16 | 中国科学院长春应用化学研究所 | Completely biodegraded polylactic acid nanometer composite material and preparation method thereof |
| CN101875765A (en) * | 2010-07-14 | 2010-11-03 | 华东理工大学 | Plasticized polylactic acid/inorganic nano composite material and preparation method thereof |
| CN102108196A (en) * | 2010-12-30 | 2011-06-29 | 广东上九生物降解塑料有限公司 | Method for preparing polylactic acid degradable material |
| CN102585465A (en) * | 2012-01-05 | 2012-07-18 | 南京航空航天大学 | Hollow microsphere reinforced polylactic acid (PLA)-based composite foaming material and preparation method thereof |
| US20130081821A1 (en) * | 2011-10-04 | 2013-04-04 | Feng Liang | Reinforcing Amorphous PLA with Solid Particles for Downhole Applications |
| CN104962052A (en) * | 2015-07-13 | 2015-10-07 | 中国石油大学(北京) | Degradable resin nano-composite material for oil and gas field operation and preparation method thereof |
| CN104987682A (en) * | 2015-07-13 | 2015-10-21 | 中国石油大学(北京) | Biodegradable resin material applied to oil and gas fields and preparation method for biodegradable resin material |
| CN105086969A (en) * | 2015-07-13 | 2015-11-25 | 中国石油大学(北京) | Degradable resin material for operation of oil and gas field and preparation method thereof |
| CN105348761A (en) * | 2015-12-11 | 2016-02-24 | 河南工程学院 | Polylactic acid material for fused deposition molding and preparation method of polylactic acid material |
| CN107722958A (en) * | 2017-08-24 | 2018-02-23 | 中国石油天然气股份有限公司 | A kind of water-soluble diversion agent of 60~90 DEG C of dissolvings and preparation method thereof |
| CN108384520A (en) * | 2018-04-02 | 2018-08-10 | 中国石油天然气集团有限公司 | A kind of degradable fiber sealing agent and preparation method thereof of drilling fluid |
| CN108659491A (en) * | 2018-06-07 | 2018-10-16 | 中国科学院长春应用化学研究所 | A kind of lactic acid composite material of activeness and quietness and preparation method thereof |
| CN109021511A (en) * | 2018-05-25 | 2018-12-18 | 哈尔滨工程大学 | A method of polylactic acid mechanical property is improved using rigid-flexible core shell nanoparticles |
| CN109233773A (en) * | 2018-11-06 | 2019-01-18 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | The non-linear self-degradation diverting agent of more cluster fracturing reforms and preparation method in a kind of section |
| CN109370179A (en) * | 2018-09-28 | 2019-02-22 | 中国科学院长春应用化学研究所 | A kind of polylactic acid multilevel hole material and preparation method thereof |
| US20190352556A1 (en) * | 2018-05-17 | 2019-11-21 | Saudi Arabian Oil Company | Method and composition for sealing a subsurface formation |
| CN111019619A (en) * | 2019-11-26 | 2020-04-17 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Liquid rubber plug temporary plugging slug for shaft isolation and preparation method |
| CN111621272A (en) * | 2020-04-30 | 2020-09-04 | 中国石油大学(华东) | Self-cleaning degradable fracturing temporary plugging agent, preparation method and application thereof |
| CN111997560A (en) * | 2020-10-28 | 2020-11-27 | 山东科兴化工有限责任公司 | Completely degradable temporary plug for oil-gas well fracturing and preparation method thereof |
-
2021
- 2021-02-05 CN CN202110159979.7A patent/CN112745819B/en active Active
Patent Citations (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070197738A1 (en) * | 2006-01-20 | 2007-08-23 | Deepak Ramaraju | Process for making polyesters |
| CN101314666A (en) * | 2007-06-01 | 2008-12-03 | 东丽纤维研究所（中国）有限公司 | Polylactic acid blend and uses thereof |
| US20080315453A1 (en) * | 2007-06-22 | 2008-12-25 | Michael Joseph Molitor | Process for the production of polyester nanocomposites |
| CN101735583A (en) * | 2009-12-15 | 2010-06-16 | 中国科学院长春应用化学研究所 | Completely biodegraded polylactic acid nanometer composite material and preparation method thereof |
| CN101875765A (en) * | 2010-07-14 | 2010-11-03 | 华东理工大学 | Plasticized polylactic acid/inorganic nano composite material and preparation method thereof |
| CN102108196A (en) * | 2010-12-30 | 2011-06-29 | 广东上九生物降解塑料有限公司 | Method for preparing polylactic acid degradable material |
| US20130081821A1 (en) * | 2011-10-04 | 2013-04-04 | Feng Liang | Reinforcing Amorphous PLA with Solid Particles for Downhole Applications |
| CN102585465A (en) * | 2012-01-05 | 2012-07-18 | 南京航空航天大学 | Hollow microsphere reinforced polylactic acid (PLA)-based composite foaming material and preparation method thereof |
| CN105086969A (en) * | 2015-07-13 | 2015-11-25 | 中国石油大学(北京) | Degradable resin material for operation of oil and gas field and preparation method thereof |
| CN104987682A (en) * | 2015-07-13 | 2015-10-21 | 中国石油大学(北京) | Biodegradable resin material applied to oil and gas fields and preparation method for biodegradable resin material |
| CN104962052A (en) * | 2015-07-13 | 2015-10-07 | 中国石油大学(北京) | Degradable resin nano-composite material for oil and gas field operation and preparation method thereof |
| CN105348761A (en) * | 2015-12-11 | 2016-02-24 | 河南工程学院 | Polylactic acid material for fused deposition molding and preparation method of polylactic acid material |
| CN107722958A (en) * | 2017-08-24 | 2018-02-23 | 中国石油天然气股份有限公司 | A kind of water-soluble diversion agent of 60~90 DEG C of dissolvings and preparation method thereof |
| CN108384520A (en) * | 2018-04-02 | 2018-08-10 | 中国石油天然气集团有限公司 | A kind of degradable fiber sealing agent and preparation method thereof of drilling fluid |
| US20190352556A1 (en) * | 2018-05-17 | 2019-11-21 | Saudi Arabian Oil Company | Method and composition for sealing a subsurface formation |
| CN109021511A (en) * | 2018-05-25 | 2018-12-18 | 哈尔滨工程大学 | A method of polylactic acid mechanical property is improved using rigid-flexible core shell nanoparticles |
| CN108659491A (en) * | 2018-06-07 | 2018-10-16 | 中国科学院长春应用化学研究所 | A kind of lactic acid composite material of activeness and quietness and preparation method thereof |
| CN109370179A (en) * | 2018-09-28 | 2019-02-22 | 中国科学院长春应用化学研究所 | A kind of polylactic acid multilevel hole material and preparation method thereof |
| CN109233773A (en) * | 2018-11-06 | 2019-01-18 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | The non-linear self-degradation diverting agent of more cluster fracturing reforms and preparation method in a kind of section |
| CN111019619A (en) * | 2019-11-26 | 2020-04-17 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Liquid rubber plug temporary plugging slug for shaft isolation and preparation method |
| CN111621272A (en) * | 2020-04-30 | 2020-09-04 | 中国石油大学(华东) | Self-cleaning degradable fracturing temporary plugging agent, preparation method and application thereof |
| CN111997560A (en) * | 2020-10-28 | 2020-11-27 | 山东科兴化工有限责任公司 | Completely degradable temporary plug for oil-gas well fracturing and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| MUNTHA ST: "Functional polymeric membrane containing inorganic nanoparticle：recent advances and applications", 《POLYMER-PLASTIC TECHNOLOGY AND ENGINEERING》 * |
| 魏泽昌: "生物可降解高分子增韧聚乳酸的研究进展", 《材料工程》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112745819B (en) | 2022-04-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Agi et al. | Synthesis and application of rice husk silica nanoparticles for chemical enhanced oil recovery | |
| CN105622132B (en) | A kind of sponge urban environmental protection regeneration aggregate pervious concrete and preparation method thereof | |
| CN102926211A (en) | Shear thickening fluid based on molecular colloid and preparation method and application of shear thickening fluid | |
| CN106883838A (en) | A kind of vitreous china ball proppant of extremely-low density high intensity and preparation method thereof | |
| CN111621272A (en) | Self-cleaning degradable fracturing temporary plugging agent, preparation method and application thereof | |
| CN110551401B (en) | Asphalt regenerant with slow release function and preparation method thereof | |
| CN106633899A (en) | Environment-friendly plastic macromolecular nano additive with flame retarding function | |
| CN112852398B (en) | High-temperature foam profile control agent for offshore heavy oil steam flooding and application thereof | |
| CN105086969A (en) | Degradable resin material for operation of oil and gas field and preparation method thereof | |
| CN108504118B (en) | RAP asphalt softening fusion regenerant and application thereof | |
| CN112745819B (en) | Degradable temporary plugging agent and preparation method thereof | |
| CN104910427A (en) | Double-degradable plastic film with high tensile strength, and preparation method thereof | |
| CN110229304B (en) | Flame-retardant graphene polyurethane composite foam material and preparation method thereof | |
| CN105541202B (en) | A kind of Grouting Cement mortar of composite toughening and preparation method thereof | |
| CN102775969B (en) | Multifunctional filtrate reducer and preparation method thereof | |
| CN115977604B (en) | Shale oil nano imbibition energy-increasing fracturing method | |
| CN107287673A (en) | A kind of soluble thick denier PVA fibers and application thereof | |
| CN115216283B (en) | Temporary blocking steering agent and preparation method thereof | |
| CN104194400A (en) | High-dispersibility modified calcium carbonate filler and preparation method thereof | |
| CN103965859A (en) | Oilwell gemini surfactant fracturing fluid and preparation method thereof | |
| CN113666730A (en) | High-strength oil fracturing magnesium aluminum silicate proppant and preparation method thereof | |
| CN104177908A (en) | Castor oil derivative anti-settling agent production method | |
| CN104927094A (en) | High-starch-content polyvinyl alcohol-blended full-degradable plastic film and preparation method thereof | |
| CN112795373A (en) | Soluble temporary plugging agent and temporary plugging ball suitable for fracturing at different temperatures and preparation method thereof | |
| CN115584252B (en) | Temporary plugging agent for fracturing operation well repair and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |