CN110593809B - Fully-soluble bridge plug sealing rubber cylinder and preparation method and application thereof - Google Patents
Fully-soluble bridge plug sealing rubber cylinder and preparation method and application thereof Download PDFInfo
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- CN110593809B CN110593809B CN201810603400.XA CN201810603400A CN110593809B CN 110593809 B CN110593809 B CN 110593809B CN 201810603400 A CN201810603400 A CN 201810603400A CN 110593809 B CN110593809 B CN 110593809B
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- sealing rubber
- rubber cylinder
- thermoplastic polyurethane
- polyurethane elastomer
- bridge plug
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 69
- 238000007789 sealing Methods 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims abstract description 22
- 239000000806 elastomer Substances 0.000 claims abstract description 22
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 16
- 229920006346 thermoplastic polyester elastomer Polymers 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000012856 packing Methods 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 9
- 238000004090 dissolution Methods 0.000 claims description 6
- 238000005469 granulation Methods 0.000 claims description 4
- 230000003179 granulation Effects 0.000 claims description 4
- 238000001746 injection moulding Methods 0.000 claims description 4
- 229920000728 polyester Polymers 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 229920000570 polyether Polymers 0.000 claims description 2
- 238000005453 pelletization Methods 0.000 claims 2
- 230000008569 process Effects 0.000 abstract description 12
- 238000005553 drilling Methods 0.000 abstract description 6
- 238000000227 grinding Methods 0.000 abstract description 6
- 230000007062 hydrolysis Effects 0.000 description 11
- 238000006460 hydrolysis reaction Methods 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 9
- 238000005086 pumping Methods 0.000 description 8
- 239000000565 sealant Substances 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 239000003921 oil Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 239000002775 capsule Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000012802 nanoclay Substances 0.000 description 3
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 229940021013 electrolyte solution Drugs 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229920000747 poly(lactic acid) Polymers 0.000 description 2
- 239000004626 polylactic acid Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- -1 alkyl quaternary ammonium salt Chemical class 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 150000004714 phosphonium salts Chemical group 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000003079 shale oil Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/78—Measuring, controlling or regulating of temperature
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/134—Bridging plugs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76531—Temperature
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sealing Material Composition (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention provides a fully soluble bridge plug sealing rubber barrel, a preparation method and application thereof, wherein the sealing rubber barrel comprises 30-70 parts of thermoplastic polyurethane elastomer and 70-30 parts of thermoplastic polyester elastomer by weight of the total weight of the sealing rubber barrel. When the temperature exceeds a certain value, the fully soluble bridge plug sealing rubber cylinder provided by the invention can be quickly and completely dissolved in flowback liquid even clear water, so that the bridge plug drilling and grinding process in a staged fracturing process is avoided; in addition, when the sealing rubber cylinder is used, the requirement of bearing the pressure of 55MPa) at the high temperature of 93 ℃ can be met within a certain time.
Description
Technical Field
The invention relates to the technical field of exploitation of unconventional oil and gas resources (such as shale gas, shale oil, compact oil and gas and the like), in particular to a bridge plug sealing rubber cylinder for a pumping bridge plug horizontal well staged fracturing technology, and a preparation method and application thereof.
Background
The shale gas revolution, which is dominated by the united states, has largely transformed the global energy and strategic pattern, shale gas has brought this originally largest oil importing country in the united states closer to energy autonomy, and the price of crude oil has been reduced from over $ 100/barrel two years ago to near $ 50/barrel recently, with a recognized dominant force being a large increase in the production of shale gas in the united states. According to the measurement and calculation, the global shale gas resource amount is about 456 multiplied by 1012m3Wherein the shale gas resource amount of the United states is close to 30 multiplied by 1012m3While the potential resource quantity of the shale gas in China exceeds 30 multiplied by 1012m3. For China in which more than 60% of crude oil depends on import and exceeds the United states, which is the largest oil import country, the exploitation of shale gas can reduce import dependence on energy, and has great significance on energy safety.
The shale gas reservoir has low pore characteristics and extremely low matrix permeability, so that fracturing is the main technology of shale gas exploitation, and the shale gas reservoir is generally transformed by adopting a horizontal well staged fracturing technology to obtain higher productivity. Compared with other horizontal well staged fracturing technologies, the pumping bridge plug horizontal well staged fracturing technology can inject sand-carrying liquid from the sleeve, so that the pumping bridge plug horizontal well staged fracturing technology has the advantages of small friction, large displacement and large liquid quantity construction, no restriction on staged fracturing stages and the like, and a seam net formed after the pumping bridge plug horizontal well staged fracturing technology is more complex, the effective modification volume is larger, a better yield-increasing effect is achieved, and the pumping bridge plug horizontal well staged fracturing technology is a current shale gas exploitation main technology.
The specific construction steps of the pumping bridge plug horizontal well staged fracturing process comprise: (1) carrying out Tubing Conveyed Perforation (TCP for short) and fracturing on the 1 st fracturing section; (2) a cable is put into a perforating gun and a fracturing bridge plug and is pumped to a position; (3) setting the bridge plug and removing the hand; (4) lifting the perforating gun to the 2 nd fracturing section and perforating; (5) pulling out the perforating gun and the bridge plug setting tool; (6) throwing a plugging ball and pumping to a proper position to plug a fracturing bridge plug; (7) fracturing the 2 nd fracturing section; (8) repeating the above steps to realize multi-stage partial pressure; (9) drilling and grinding all bridge plugs and plugging balls to the bottom of the well; (10) and (6) draining liquid and obtaining yield.
The conventional pumping bridge plug needs drilling and grinding, influences the production time and effect, and has the following defects and limitations: 1) the oil well needs to be well-killing, the gas well needs to use coiled tubing or pressurized well repairing equipment, and the cost is high; 2) the construction risk is high, and deep wells and ultra-deep well bridge plugs are difficult to drill and grind; 3) the construction time is long, the flowback of the fracturing fluid and the construction of productivity are influenced, and the stratum is polluted.
The defects of the traditional horizontal well drilling and grinding process are detailed in the patents with the publication numbers of CN103201453A and CN105840166A, the soluble bridge plug can greatly reduce the process cost and the construction time, and the soluble bridge plug has important significance for the exploitation of unconventional oil and gas resources.
The patent publication No. CN105672492 and CN103201453A disclose the composition of metal-based soluble bridge plugs, which are soluble in specific electrolyte solutions, and the patent publication No. CN105672492 mentions that a small amount (3.5% -4.5%) of polylactic acid, a bio-based degradable material, is added to copper-aluminum alloy, but does not describe how to alloy polylactic acid, which is easily degraded at high temperature, with copper-aluminum with high melting point. Also, dissolution of the metal-based soluble bridge plug still requires injection of a specific electrolyte solution downhole, which increases process difficulty and time.
In addition, the sealing rubber cylinder is an important component of the bridge plug, and the traditional sealing rubber cylinder uses fully-vulcanized insoluble infusible rubber materials (such as nitrile rubber), so that the traditional sealing rubber cylinder is very unfavorable for dissolving the bridge plug and cannot meet the requirement of rapid hydrolysis.
Therefore, a new sealant cartridge for fitting a soluble bridge plug is needed.
Disclosure of Invention
In order to solve the problems, the invention provides a fully soluble bridge plug sealing rubber cylinder, a preparation method and an application thereof, wherein the sealing rubber cylinder can be rapidly and completely dissolved when the temperature of a medium (such as return liquid or clear water) exceeds a certain value, so that a bridge plug drilling and grinding process in a staged fracturing process is avoided; in addition, when the sealing rubber cylinder is used, the requirement of bearing the pressure of 55MPa at the high temperature of 93 ℃ within a certain time can be met.
The invention provides the following technical scheme:
a fully soluble bridge plug sealant barrel comprises 30-70 parts of thermoplastic polyurethane elastomer and 70-30 parts of thermoplastic polyester elastomer by total weight of the sealant barrel.
The packing rubber cartridge within the above composition and content ranges has a balanced sealing property and high-temperature hydrolysis property. Experiments show that when the content of the thermoplastic polyurethane elastomer is lower than 30 parts (or the content of the thermoplastic polyester elastomer is higher than 70 parts), the hydrolysis speed of the sealing rubber cylinder at high temperature is too low to meet the requirement of rapid hydrolysis in a backflow environment; when the content of the thermoplastic polyurethane elastomer is higher than 70 parts (or the content of the thermoplastic polyester elastomer is lower than 30 parts), the sealing performance of the sealing rubber cylinder at high temperature is reduced, and the sealing requirement in a backflow environment cannot be met.
According to the present invention, the thermoplastic polyurethane elastomer includes at least one of a polyether type thermoplastic polyurethane elastomer and a polyester type thermoplastic polyurethane elastomer.
Preferably, the thermoplastic polyurethane elastomer is a polyester type thermoplastic polyurethane elastomer. The reason for this is that the polyester type thermoplastic polyurethane elastomer has better hydrolysis properties.
According to the invention, the Shore hardness of the thermoplastic polyurethane elastomer is 70-95A. Experiments show that when the Shore hardness is lower than 70A, the sealing rubber cylinder cannot meet the pressure bearing requirement at high temperature; when the shore hardness is higher than 95A, the sealing rubber cylinder can exceed the requirement of the fracturing process due to too high initial setting pressure.
According to the invention, the Shore hardness of the thermoplastic polyester elastomer is 30D-50D. Experiments show that when the Shore hardness is lower than 30D, the sealing rubber cylinder cannot meet the pressure bearing requirement at high temperature, and when the Shore hardness is higher than 50D, the sealing rubber cylinder exceeds the requirement of a fracturing process due to too high initial setting pressure.
According to the invention, the packing rubber sleeve further comprises not more than 5 parts of hydrolysis regulator by the total weight of the packing rubber sleeve, and the total weight of the packing rubber sleeve meets 100 parts. The hydrolysis regulator can regulate the hydrolysis performance of the sealing rubber cylinder.
According to the present invention, the hydrolysis modifier includes, but is not limited to, nanoclay and/or polycarbodiimide. Wherein, the nano clay can accelerate the high-temperature hydrolysis of the sealing rubber cylinder, and the polycarbodiimide can reduce the high-temperature hydrolysis speed of the sealing rubber cylinder.
Preferably, the nanoclay refers to an organoclay intercalated with an alkyl quaternary ammonium salt or an alkyl quaternary phosphonium salt.
According to the invention, the packing sleeve can withstand pressures of up to 55MPa (e.g. 35-55MPa) at elevated temperatures of up to 93 ℃ (e.g. 60-93 ℃).
Preferably, the exposure time is 10-5000 minutes, such as 1000-.
According to the invention, the dissolution temperature of the packing capsules in the medium is above 95 ℃, for example 95-100 ℃.
According to the invention, the packing capsules begin to dissolve after being immersed in the medium for more than 48 hours, for example between 48 and 115 hours.
Preferably, the medium is a flowback liquid or clean water.
The invention also provides a preparation method of the sealing rubber cylinder, which comprises the following steps: and (2) granulating a blend of 30-70 parts of thermoplastic polyurethane elastomer and 70-30 parts of thermoplastic polyester elastomer according to the total weight of the sealing rubber cylinder, and then carrying out injection molding on the obtained blend granules according to the required size of the sealing rubber cylinder to obtain the sealing rubber cylinder.
According to the invention, the granulation temperature is 170-240 ℃.
According to the invention, the granulation is carried out by extrusion through a twin-screw extruder.
Preferably, the rotation speed of the twin screw is 100-400 rpm.
Experiments show that when the granulating temperature is lower than 170 ℃ or the rotating speed of the twin screw is lower than 100rpm, the obtained blend is difficult to plasticize, and when the granulating temperature is higher than 240 ℃ or the rotating speed of the twin screw is higher than 400rpm, the obtained blend is easy to thermally degrade.
According to the invention, the molding temperature is 170-240 ℃.
The invention also provides a bridge plug which comprises the sealing rubber cylinder.
Advantageous effects
When the temperature exceeds a certain value, the fully soluble bridge plug sealing rubber cylinder provided by the invention can be quickly and completely dissolved in flowback liquid even clear water, so that the bridge plug drilling and grinding process in a staged fracturing process is avoided; in addition, when the sealing rubber cylinder is used, the requirement of bearing the pressure of 55MPa) at the high temperature of 93 ℃ can be met within a certain time.
Drawings
FIG. 1 is a picture of the sample of example 1 before dissolution;
FIG. 2 is a photograph of the sample of example 1 after being soaked for 48 hours;
fig. 3 is a picture of the sample of example 1 after soaking for 115 hours.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that various changes or modifications can be made by those skilled in the art after reading the disclosure of the present invention, and such equivalents also fall within the scope of the invention.
The experimental methods used in the following examples are all conventional methods unless otherwise specified; reagents, materials and the like used in the following examples are commercially available unless otherwise specified.
Example 1
Preparing a sealing rubber cylinder
Uniformly mixing 30 parts by weight of thermoplastic polyurethane elastomer WHT1570 and 70 parts by weight of thermoplastic polyester elastomer hytrel 4032 based on the total weight of the sealant barrel, granulating by using a double-screw extruder, and performing injection molding on the obtained blend particles according to the size required by the sealant barrel to form the sealant barrel, wherein the processing temperature of the extrusion granulation and the injection molding is 220 ℃.
Example 2
The sealing rubber cylinder in example 1 was subjected to a high-temperature pressure-bearing performance test and a solubility test, respectively.
The solubility test and results for the packing capsules of example 1 are as follows:
a small sample of the packing cylinder was sawn out with a saw and weighed separately. After weighing, 2 samples are respectively put into 2 heating boxes, and then clear water is added to heat the samples to 95 ℃. The dissolution of the sample was observed, and the hardness and volume of the sample did not change significantly in the first 48 hours, as shown in fig. 2. After 48 hours, the sample began to soften and could be easily punctured with chopsticks. Over time, the sample began to break itself into pieces after 115 hours, with the hardness continuing to diminish. The pictures of the samples before dissolution and after 115 hours of soaking are shown in fig. 1 and fig. 3, respectively. According to the test experiments, the conclusion is drawn that the sealing rubber cylinder is soluble in clear water and can meet the requirement of flowback after being dissolved.
The sealant cartridge of example 1 was subjected to a high temperature pressure performance test, and the test results are shown in table 1.
TABLE 1 high temperature bearing performance of packing element
The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. The fully soluble bridge plug sealing rubber barrel is characterized by being prepared from 30 parts of thermoplastic polyurethane elastomer and 70 parts of thermoplastic polyester elastomer by weight of the total weight of the sealing rubber barrel;
the Shore hardness of the thermoplastic polyurethane elastomer is 70A-95A;
the Shore hardness of the thermoplastic polyester elastomer is 30D-50D;
the sealing rubber cylinder simultaneously meets the following performances:
(1) can bear the pressure of 55MPa at the high temperature of 93 ℃; the bearing time is 10-5000 minutes;
(2) the dissolving temperature of the sealing rubber cylinder in the medium is more than 95 ℃; the medium is return liquid or clear water;
(3) the sealing rubber cylinder begins to dissolve after being soaked in the medium for more than 48 hours.
2. The packing rubber cartridge of claim 1, wherein the thermoplastic polyurethane elastomer comprises at least one of a polyether type thermoplastic polyurethane elastomer and a polyester type thermoplastic polyurethane elastomer.
3. The packing box of claim 2, wherein the thermoplastic polyurethane elastomer is a polyester-type thermoplastic polyurethane elastomer.
4. The packing cartridge as claimed in claim 1, wherein the time period is 1000-2000 minutes.
5. The packing box of claim 1, wherein the dissolution temperature is 95-100 ℃.
6. The packing unit of claim 1, wherein the soaking time is 48 to 115 hours.
7. A method of making the packing sleeve of any one of claims 1-6, comprising the steps of: granulating a blend of 30 parts of thermoplastic polyurethane elastomer and 70 parts of thermoplastic polyester elastomer according to the total weight of the sealing rubber cylinder, and then carrying out injection molding on the obtained blend particles according to the size required by the sealing rubber cylinder to obtain the sealing rubber cylinder;
the Shore hardness of the thermoplastic polyurethane elastomer is 70A-95A;
the Shore hardness of the thermoplastic polyester elastomer is 30D-50D.
8. The method as claimed in claim 7, wherein the granulation temperature is 170-240 ℃.
9. The method of claim 7, wherein the pelletizing is extrusion pelletizing via a twin screw extruder.
10. The method as claimed in claim 9, wherein the twin screw rotation speed is 100-400 rpm.
11. The method as claimed in any one of claims 7 to 10, wherein the molding temperature is 170-240 ℃.
12. A bridge plug comprising a bridge plug packing sleeve according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810603400.XA CN110593809B (en) | 2018-06-12 | 2018-06-12 | Fully-soluble bridge plug sealing rubber cylinder and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810603400.XA CN110593809B (en) | 2018-06-12 | 2018-06-12 | Fully-soluble bridge plug sealing rubber cylinder and preparation method and application thereof |
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| Publication Number | Publication Date |
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| CN110593809A CN110593809A (en) | 2019-12-20 |
| CN110593809B true CN110593809B (en) | 2021-12-14 |
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| CN111961315B (en) * | 2020-08-28 | 2022-06-10 | 上海浦景化工技术股份有限公司 | Degradable elastic functional material and product and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1398347A1 (en) * | 2002-09-16 | 2004-03-17 | The Goodyear Tire & Rubber Company | Tire with tread of cis 1,4-polybutadiene-rich rubber composition which contains a functional styrene/butadiene elastomer, silica and coupling agent |
| EP2027360A1 (en) * | 2006-06-09 | 2009-02-25 | Halliburton Energy Services, Inc. | Methods and devices for treating multiple-interval well bores |
| JP2013234269A (en) * | 2012-05-09 | 2013-11-21 | Yokohama Rubber Co Ltd:The | Rubber composition for high damping rubber support and high damping rubber support |
| CN105593463A (en) * | 2013-12-26 | 2016-05-18 | 株式会社吴羽 | Downhole tool or downhole tool member, degradable resin composition, and method for recovering hydrocarbon resources |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050171248A1 (en) * | 2004-02-02 | 2005-08-04 | Yanmei Li | Hydrogel for use in downhole seal applications |
| US20070112139A1 (en) * | 2005-11-14 | 2007-05-17 | Ellul Maria D | Peroxide-cured thermoplastic vulcanizates and process for making the same |
| CN101230184A (en) * | 2008-02-01 | 2008-07-30 | 北京市化学工业研究院 | Polyester elastomer composition and method of making the same |
| CN101857720B (en) * | 2010-03-10 | 2013-01-23 | 上海锦湖日丽塑料有限公司 | High-strength heat-resistant thermoplastic polyurethane composition and preparation method thereof |
| US10240427B2 (en) * | 2014-07-07 | 2019-03-26 | Halliburton Energy Services, Inc. | Downhole tools comprising aqueous-degradable sealing elements |
| CN108104765A (en) * | 2018-02-09 | 2018-06-01 | 四机赛瓦石油钻采设备有限公司 | A kind of solvable bridge plug of single deck tape-recorder whole pottery |
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- 2018-06-12 CN CN201810603400.XA patent/CN110593809B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1398347A1 (en) * | 2002-09-16 | 2004-03-17 | The Goodyear Tire & Rubber Company | Tire with tread of cis 1,4-polybutadiene-rich rubber composition which contains a functional styrene/butadiene elastomer, silica and coupling agent |
| EP2027360A1 (en) * | 2006-06-09 | 2009-02-25 | Halliburton Energy Services, Inc. | Methods and devices for treating multiple-interval well bores |
| JP2013234269A (en) * | 2012-05-09 | 2013-11-21 | Yokohama Rubber Co Ltd:The | Rubber composition for high damping rubber support and high damping rubber support |
| CN105593463A (en) * | 2013-12-26 | 2016-05-18 | 株式会社吴羽 | Downhole tool or downhole tool member, degradable resin composition, and method for recovering hydrocarbon resources |
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| CN110593809A (en) | 2019-12-20 |
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