CN115746804B - Lipophilic inert material for plugging oil-based drilling fluid and preparation method thereof - Google Patents
Lipophilic inert material for plugging oil-based drilling fluid and preparation method thereof Download PDFInfo
- Publication number
- CN115746804B CN115746804B CN202111027489.8A CN202111027489A CN115746804B CN 115746804 B CN115746804 B CN 115746804B CN 202111027489 A CN202111027489 A CN 202111027489A CN 115746804 B CN115746804 B CN 115746804B
- Authority
- CN
- China
- Prior art keywords
- plugging
- oil
- inert
- based drilling
- drilling fluid
- 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.)
- Active
Links
- 239000000463 material Substances 0.000 title claims abstract description 94
- 238000005553 drilling Methods 0.000 title claims abstract description 45
- 239000012530 fluid Substances 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 18
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 17
- 229920000642 polymer Polymers 0.000 claims abstract description 11
- 238000012545 processing Methods 0.000 claims abstract description 8
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 15
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 9
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 4
- 239000004113 Sepiolite Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 229910052624 sepiolite Inorganic materials 0.000 claims description 3
- 235000019355 sepiolite Nutrition 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims 1
- 238000001816 cooling Methods 0.000 abstract description 8
- 238000009740 moulding (composite fabrication) Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 239000011435 rock Substances 0.000 abstract description 6
- 238000011031 large-scale manufacturing process Methods 0.000 abstract 1
- 238000012986 modification Methods 0.000 description 8
- 230000004048 modification Effects 0.000 description 8
- 238000003756 stirring Methods 0.000 description 5
- 229920002943 EPDM rubber Polymers 0.000 description 3
- JZCCFEFSEZPSOG-UHFFFAOYSA-L copper(II) sulfate pentahydrate Chemical compound O.O.O.O.O.[Cu+2].[O-]S([O-])(=O)=O JZCCFEFSEZPSOG-UHFFFAOYSA-L 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 description 3
- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 description 3
- 239000006004 Quartz sand Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 229910000366 copper(II) sulfate Inorganic materials 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 1
- 229910052601 baryte Inorganic materials 0.000 description 1
- 239000010428 baryte Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000009918 complex formation Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052878 cordierite Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000007909 melt granulation Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention provides a preparation method of an oleophilic inert material for plugging oil-based drilling fluid, which comprises the steps of mixing the inert plugging material with an oleophilic thermoplastic high polymer, adsorbing the high polymer by the plugging material at high temperature, cooling, processing and forming to obtain the plugging material with oleophilic surface. The inert plugging material has strong hydrophilicity, is not easy to reside in the oil-based drilling fluid, has poor stability of a plugging layer and has unsatisfactory plugging effect. The modified inert material prepared by the invention has the advantages that on the premise of keeping the original plugging performance, the surface polymer absorbs oil and expands, has cohesiveness, can bond the rock of the plugging layer and the auxiliary plugging material, improves the residence property of the plugging material and the stability of the plugging layer, solves the problems of backflow, re-plugging and the like of the plugging material, and meets the plugging requirement of the oil-based drilling fluid. The preparation method provided by the invention adopts a high-temperature mixing method of the high polymer, is safe and simple, and is convenient for large-scale production. The invention also provides an oleophilic inert material for plugging the oil-based drilling fluid.
Description
Technical Field
The invention belongs to the technical field of oilfield chemistry, and particularly relates to a lipophilic inert material for plugging oil-based drilling fluid and a preparation method thereof.
Background
Along with the increasing number of complex formations in which oil-based drilling fluid is used for drilling, the cracks and pores of the formations are developed, the oil-based drilling fluid is seriously lost, and the development and application of the oil-based drilling fluid plugging material are slow. For oil-based drilling fluid leakage, the on-site common plugging material is mainly water-based drilling fluid plugging material. However, the plugging materials have strong hydrophilicity and poor compatibility in oil-based drilling fluid, so that the plugging materials have insufficient residence capacity and poor anti-damage capacity of a plugging layer, are easy to return and re-leak, and have unsatisfactory plugging effect. The plugging material in the prior art has no lipophilicity and oil absorption cohesiveness, and can not solve the problems of difficult material residence, poor stability of a plugging layer and the like in plugging of oil-based drilling fluid.
Disclosure of Invention
In view of the above, the invention aims to provide the lipophilic inert material for plugging the oil-based drilling fluid and the preparation method thereof.
The invention provides a preparation method of an oleophylic inert material for plugging oil-based drilling fluid, which comprises the following steps:
And mixing the inert plugging material with the oleophilic thermoplastic polymer, and then processing and forming to obtain the oleophilic inert material for plugging the oil-based drilling fluid.
Preferably, the inert plugging material is selected from one or more of calcium carbonate, green stone powder, shell powder, quartz sand, glass fiber and sepiolite fiber.
Preferably, the oleophilic thermoplastic polymer is selected from one or more of polyethylene-vinyl acetate, polyethylene-butyl acrylate, polystyrene-butadiene-styrene, SBS, ethylene propylene diene monomer and styrene butadiene rubber.
Preferably, the mass ratio of the inert plugging material to the lipophilic thermoplastic polymer is (50-99): 1-50.
Preferably, the temperature of the mixing is 60 ℃ to 300 ℃.
Preferably, the mixing time is 10 min-120 min.
Preferably, the mixing method is mixing.
Preferably, the particle size of the oleophilic thermoplastic polymer is from 1 μm to 5,000 μm.
The invention provides the lipophilic inert material for plugging the oil-based drilling fluid, which is prepared by the method.
The invention uses the lipophilic thermoplastic high polymer to modify the conventional inert plugging material through high-temperature blending, and the modified material still has the original plugging characteristic; the surface of the material absorbs oil, swells and becomes sticky at the temperature of the leakage layer, has cohesiveness, can bond the leakage layer rock and the plugging material, improves the residence property of the plugging material and the stability of the plugging layer, effectively solves the problems of backflow, re-leakage and the like of the plugging material, and has important significance for plugging oil-based drilling.
The invention is based on the lipophilic modification of the surface of the plugging material, and the acting force among the plugging material, the plugging layer rock and the plugging material is improved by the modification, so that the purposes of improving the residence capacity of the plugging material and the stability of the plugging layer are realized, and the problems of difficult residence of the plugging material, easy return and re-leakage and the like are solved. The method provided by the invention does not contain lipophilic monomers in the modification process, and has the advantages of simple equipment and preparation process, safety, environmental protection and convenience for mass production.
The product prepared by the invention is an inert plugging material with the surface modified by oleophylic property, and a layer of oleophylic polymer is adsorbed on the surface of the inert material; the main body is made of conventional inert plugging materials and still has the original plugging capability; the oil-based drilling fluid is solid at normal temperature, has small influence on rheological property of the oil-based drilling fluid, and is convenient to pump to a leakage layer; under the temperature and pressure of the leakage layer, the polymer on the surface of the material absorbs oil and expands and slowly becomes sticky; the surface bonded by the plugging material can effectively bond the rock of the plugging layer, so that the residence capacity is improved; the stability of the plugging layer is improved by self-bonding and other plugging materials; the plugging material provided by the invention can effectively solve the problems of difficult residence, poor stability of a plugging layer and the like of the conventional plugging material in an oil phase environment, so that the problems of returning and re-leaking of the plugging material are solved, and the plugging requirement of oil-based drilling fluid is met.
Drawings
FIG. 1 is a picture of a plugging layer taken out after plugging the product prepared in example 1 of the present invention;
FIG. 2 is a photograph of the plugging layer taken after plugging with the product prepared in example 1 according to the present invention after applying pressure;
FIG. 3 is a graph showing the relationship between the pressure after plugging and the deformation of the plugging layer of the product prepared in example 1 of the present invention.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other examples of modifications and alterations will be apparent to those skilled in the art based on the examples herein, and are intended to be within the scope of the invention. It should be understood that the embodiments of the present invention are only used for illustrating the technical effects of the present invention, and are not used for limiting the scope of the present invention. In the examples, the methods used are conventional methods unless otherwise specified.
The invention provides a preparation method of an oleophylic inert material for plugging oil-based drilling fluid, which comprises the following steps:
And mixing the inert plugging material with the oleophilic thermoplastic polymer, and then processing and forming to obtain the oleophilic inert material for plugging the oil-based drilling fluid.
In the invention, the inert plugging material is preferably one or more selected from calcium carbonate, green stone powder, shell powder, quartz sand, glass fiber and sepiolite fiber.
In the present invention, the oleophilic thermoplastic polymer is preferably selected from one or more of polyethylene-vinyl acetate (EVA), polyethylene-butyl acrylate (EBA), polystyrene-butadiene-styrene (SBS), saturated SBS (SEBS), ethylene Propylene Diene Monomer (EPDM) and general Styrene Butadiene Rubber (SBR).
In the present invention, the particle size of the oleophilic thermoplastic polymer is preferably 1 μm to 5,000. Mu.m, more preferably 10 to 4000. Mu.m, more preferably 50 to 3000. Mu.m, more preferably 100 to 2000. Mu.m, more preferably 500 to 1500. Mu.m, more preferably 800 to 1200. Mu.m, and most preferably 1000. Mu.m.
In the invention, the mass ratio of the inert plugging material to the lipophilic thermoplastic polymer is preferably (50-99): (1-50), more preferably (60-90): (5 to 40), more preferably (70 to 80): (10 to 30), most preferably 75:20.
In the present invention, the mixing is preferably performed under stirring; the method of mixing is preferably mixing; the temperature of the mixing is preferably 60-300 ℃, more preferably 100-250 ℃, more preferably 150-200 ℃, most preferably 160-180 ℃; the mixing time is preferably 10 to 120 minutes, more preferably 20 to 100 minutes, still more preferably 50 to 80 minutes, and most preferably 60 to 70 minutes.
In the present invention, the mixed solution preferably further comprises:
And cooling the mixed product, and then processing and forming.
In the present invention, the temperature of the cooling is preferably less than 60 ℃.
In the present invention, it is preferable that the granulation is performed by extrusion granulation, melt granulation, crushing granulation, or the like in accordance with the characteristics of the lipophilic thermoplastic polymer in the process of molding.
In the present invention, the particle diameter of the pellets is preferably 160 to 600. Mu.m, more preferably 200 to 550. Mu.m, still more preferably 250 to 500. Mu.m, still more preferably 300 to 450. Mu.m, and most preferably 350 to 400. Mu.m.
In the invention, the product is preferably kept similar to the appearance of the inert plugging material in the process of processing and forming, and the invention aims to carry out surface modification on the inert material and keep the original appearance of the inert material as much as possible.
In the invention, the preparation method of the lipophilic inert material for plugging the oil-based drilling fluid preferably comprises the following steps:
mixing the inert plugging material with the oleophilic thermoplastic polymer, and stirring at high temperature to adsorb the polymer, cooling and molding to obtain the surface oleophilic plugging material.
In the present invention, the preparation method of the lipophilic inert material for plugging the oil-based drilling fluid more preferably comprises the following steps:
Adding an oleophilic thermoplastic polymer powder or particles to the container;
adding an inert plugging material into the container, and fully stirring;
Mixing the obtained mixture;
and cooling the mixed product, and processing and forming to obtain the plugging material with the surface modified by oleophylic property.
The invention provides the lipophilic inert material for plugging the oil-based drilling fluid, which is prepared by the method.
In the present invention, the particle size of the lipophilic inert material for plugging of oil-based drilling fluid is preferably 160 to 600. Mu.m, more preferably 200 to 550. Mu.m, more preferably 250 to 500. Mu.m, more preferably 300 to 450. Mu.m, and most preferably 350 to 400. Mu.m.
The main body of the oleophylic inert material provided by the invention is a conventional inert plugging material, and still has the original plugging capability; the oil-based drilling fluid is solid at normal temperature, has small influence on rheological property of the oil-based drilling fluid, and is convenient to pump to a leakage layer; under the temperature and pressure of the leakage layer, the polymer on the surface of the material absorbs oil and expands and slowly becomes sticky; the surface bonded by the plugging material can effectively bond the rock of the plugging layer, so that the residence capacity is improved; the stability of the plugging layer is improved by self-bonding and other plugging materials; the plugging material can effectively solve the problems of difficult residence, poor stability of a plugging layer and the like of the conventional plugging material in an oil phase environment, so that the problems of spitting back, re-leakage and the like of the plugging material are solved, and the requirement of plugging of oil-based drilling fluid is met.
Example 1
Mixing 30g of polyethylene-vinyl acetate (EVA) powder and 70g of calcium carbonate powder, fully stirring, mixing for 10-20 min at 150 ℃, cooling, granulating, and obtaining the surface oleophylic modified calcium carbonate powder with the particle size of 160-600 mu m.
Example 2
Mixing 30gSBS g of blue stone powder with 70g of blue stone powder, fully stirring, mixing for 10-20 min at 180 ℃, cooling, processing and forming to obtain the surface oleophylic modified blue stone powder with the particle size of 160-600 mu m.
Example 3
Mixing 30g Styrene Butadiene Rubber (SBR) and 70g diatomite uniformly, mixing for 10-20 min at 180 ℃, cooling, granulating and obtaining the surface oleophylic modified diatomite with the particle size of 160-600 mu m.
Performance detection
(1) Evaluation of blocking Property
The product prepared by the embodiment of the invention is subjected to related performance evaluation, and the result is as follows:
Oil-based drilling fluid (density 1.5g/cm 3): diesel oil (oil-water ratio=80:20) +3wt% organic soil+3wt% main emulsion (provided by middle petrochemical middle and primary engineering drilling institute) +3wt% auxiliary emulsion (provided by middle petrochemical middle and primary engineering drilling institute) +CaCl 2 solution (mass concentration is 20%) +barite, and aging at 150 ℃ for 16 hours for standby.
The plugging slurry formula comprises the following components: oil-based drilling fluid + conventional inert lost circulation material with modified surface oleophilic prepared in the example.
5G, 10g and 15g of the inert plugging material with the surface modified by oleophylic property prepared in the embodiment are respectively added into 200mL of oil-based drilling fluid, stirred uniformly, kept stand and sealed, and kept stand for 2 hours at 80 ℃.
Adopting river sand with 20-40 meshes, and drying at 80 ℃ for 0.5h. The sand bed cylinder is preheated in advance, 15cm of preheated river sand is added, the plugging slurry is added while the sand bed cylinder is hot, the sand bed cylinder is pressurized to 0.69MPa, and the plugging condition of the plugging slurry is observed. To better illustrate the effect of the plugging material, a comparative experiment was performed using unmodified calcium carbonate powder and a cordierite powder instead of the modified material in the examples, respectively, and the experimental results are shown in table 1.
Table 1 results of the product leakage measurement prepared in the examples
As can be seen from Table 1, the modified plugging material prepared by the embodiment of the invention can effectively plug the pores in the sand bed, and has a good plugging effect. The plugging effect of the conventional plugging material is poor, which indicates that the plugging performance of the plugging material can be effectively improved through lipophilic modification of the conventional plugging material.
(2) Evaluation of stability of blocking layer
Taking out the plugging layer after plugging (oil-based drilling fluid+10g of example 1), observing the change of the plugging layer under the action of pressure as shown in figure 1, and compressing 80% of the plugging layer as shown in figure 2; and the relationship between the recorded pressure and the deformation of the plugging layer is shown in figure 3.
As can be seen from fig. 1 and 2, the plugging layer containing the modified plugging material can be effectively bonded with river sand to form an integral plugging layer; under the action of external force, river sand particles in the plugging layer are not dispersed and still form a whole. The invention can effectively improve the stability of the plugging layer through oleophylic modification, thereby solving the problems of return spitting, re-leakage and the like of the oil-based drilling fluid plugging material.
As can be seen from the above examples, the main body of the product provided by the invention is a conventional inert plugging material and still has the original plugging capability; the oil-based drilling fluid is solid at normal temperature, has small influence on rheological property of the oil-based drilling fluid, and is convenient to pump to a leakage layer; under the temperature and pressure of the leakage layer, the polymer on the surface of the material absorbs oil and expands and slowly becomes sticky; the surface bonded by the plugging material can effectively bond the rock of the plugging layer, so that the residence capacity is improved; the stability of the plugging layer is improved by self-bonding and other plugging materials; the plugging material can effectively solve the problems of difficult residence, poor stability of a plugging layer and the like of the conventional plugging material in an oil phase environment, so that the problems of spitting back, re-leakage and the like of the plugging material are solved, and the requirement of plugging of oil-based drilling fluid is met.
While the invention has been described with respect to the preferred embodiments, it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention and are intended to be within the scope of the present invention.
Claims (8)
1. A preparation method of an oleophilic inert material for plugging oil-based drilling fluid comprises the following steps:
Mixing the inert plugging material with the oleophylic thermoplastic high polymer, and then processing and forming to obtain the oleophylic inert material for plugging the oil-based drilling fluid;
The oleophilic thermoplastic polymer is selected from polyethylene-vinyl acetate.
2. The method of claim 1, wherein the inert plugging material is selected from one or more of calcium carbonate, green stone powder, shell powder, silica sand, glass fiber, and sepiolite fiber.
3. The method of claim 1, wherein the mass ratio of inert lost circulation material to lipophilic thermoplastic polymer is from (50 to 99): from (1 to 50).
4. The method of claim 1, wherein the temperature of the mixing is from 60 ℃ to 300 ℃.
5. The method of claim 1, wherein the mixing is for a period of time ranging from 10 minutes to 120 minutes.
6. The method of claim 1, wherein the method of mixing is mixing.
7. The method of claim 1, wherein the oleophilic thermoplastic polymer has a particle size of 1 μm to 5,000 μm.
8. An oleophilic inert material for plugging of oil-based drilling fluids prepared by the method of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111027489.8A CN115746804B (en) | 2021-09-02 | 2021-09-02 | Lipophilic inert material for plugging oil-based drilling fluid and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111027489.8A CN115746804B (en) | 2021-09-02 | 2021-09-02 | Lipophilic inert material for plugging oil-based drilling fluid and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115746804A CN115746804A (en) | 2023-03-07 |
| CN115746804B true CN115746804B (en) | 2024-07-12 |
Family
ID=85332251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111027489.8A Active CN115746804B (en) | 2021-09-02 | 2021-09-02 | Lipophilic inert material for plugging oil-based drilling fluid and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115746804B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106634898A (en) * | 2015-07-15 | 2017-05-10 | 中国石油化工股份有限公司 | Drill-feeding plugging agent used for oil-based drilling fluid, preparation method and application thereof |
| CN107987807A (en) * | 2017-11-28 | 2018-05-04 | 中国石油集团渤海钻探工程有限公司 | Shell core formula oil base drilling fluid leak stopping bridge formation particle and preparation method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108219332A (en) * | 2017-12-29 | 2018-06-29 | 中海石油(中国)有限公司湛江分公司 | A kind of oil suction expanding material and its preparation method and application |
| CN111849431B (en) * | 2020-07-29 | 2022-10-28 | 长江大学 | Composite plugging material for well drilling and application thereof |
| CN112375394A (en) * | 2020-11-08 | 2021-02-19 | 北京化工大学 | Lipophilic easily-deformable high-blocking deformation particles and preparation |
| CN112724946A (en) * | 2021-02-03 | 2021-04-30 | 库尔勒同益工贸有限责任公司 | Fiber polymer plugging agent for drilling fluid and preparation method thereof |
-
2021
- 2021-09-02 CN CN202111027489.8A patent/CN115746804B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106634898A (en) * | 2015-07-15 | 2017-05-10 | 中国石油化工股份有限公司 | Drill-feeding plugging agent used for oil-based drilling fluid, preparation method and application thereof |
| CN107987807A (en) * | 2017-11-28 | 2018-05-04 | 中国石油集团渤海钻探工程有限公司 | Shell core formula oil base drilling fluid leak stopping bridge formation particle and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115746804A (en) | 2023-03-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5407879A (en) | Method of improving the contaminant resistance of a smectite clay by rewetting and impregnating the clay with a water-soluble polymer, and redrying the polymer-impregnated clay | |
| US4836940A (en) | Composition and method of controlling lost circulation from wellbores | |
| CN104388067B (en) | Composite leak-proof agent for oil-based drilling fluid | |
| US3319716A (en) | Fluid loss additive for well fluids, composition and process | |
| CN104650829B (en) | Container horizon protective agent composition and for the drilling fluid of middle permeable reservoir strata and application thereof | |
| CN104650823B (en) | Height ooze extra-high ooze reservoir protective material composition and drilling fluid and application thereof | |
| CN113355069B (en) | High-temperature-resistant modified nano-silica plugging agent and oil-based drilling fluid | |
| CN110358513B (en) | Bridging leak stoppage slurry and preparation method thereof | |
| WO2004109053A2 (en) | Lost circulation material blend offering high fluid loss with minimum solids | |
| CN103409118B (en) | A kind of synthetic method of water-base drilling fluid ultrahigh-temperature stablizer | |
| CN111363525B (en) | Amphoteric graphene oxide plugging anti-collapse agent, and preparation method and application thereof | |
| US20090018036A1 (en) | Conformance improvement additive, conformance treatment fluid made therefrom, method of improving conformance in a subterranean formation | |
| CN111808224B (en) | Copolymer and preparation method thereof, application of copolymer as plugging agent, oil-based drilling fluid and application of oil-based drilling fluid | |
| US20220267162A1 (en) | Modified montmorillonite self-repairing agent and preparation method and use thereof | |
| CN115746804B (en) | Lipophilic inert material for plugging oil-based drilling fluid and preparation method thereof | |
| CN113122199A (en) | Medium-high temperature strong-plugging hard rubber micro-foam drilling fluid and preparation method thereof | |
| CN115505070A (en) | High-temperature-resistant expansion fiber resin plugging material, preparation method thereof and application thereof in leak prevention and plugging of well cementation cement slurry | |
| CN105441046A (en) | Hydrogen-bonding hydrogel suitable for plugging cracks and caves | |
| CN114456780B (en) | High-temperature high-density anti-sloughing drilling fluid composition and drilling fluid, preparation method and application thereof | |
| CN111778000A (en) | Modified plant fiber while-drilling plugging agent for drilling fluid and preparation method thereof | |
| CN115893911B (en) | Clay-loaded crosslinked polymer flexible impermeable barrier material and preparation method thereof | |
| CN113122200B (en) | Medium-high temperature hard rubber recyclable foam drilling fluid and preparation method thereof | |
| CN116059964A (en) | Oleophilic adsorptive graphite, preparation method thereof and plugging agent for oil-based drilling fluid | |
| CN115873178A (en) | Hydrophobic flocculant and preparation method and application thereof | |
| CN116262799A (en) | Oil-based drilling fluid, thermal adhesion plugging material 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 |