CN112796660A - Construction method of double-parallel-branch horizontal communication well - Google Patents
Construction method of double-parallel-branch horizontal communication well Download PDFInfo
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- CN112796660A CN112796660A CN202110098242.9A CN202110098242A CN112796660A CN 112796660 A CN112796660 A CN 112796660A CN 202110098242 A CN202110098242 A CN 202110098242A CN 112796660 A CN112796660 A CN 112796660A
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- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/046—Directional drilling horizontal drilling
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- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
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- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/30—Specific pattern of wells, e.g. optimising the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimising the spacing of wells comprising at least one inclined or horizontal well
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- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/06—Deflecting the direction of boreholes
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Earth Drilling (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a construction method of a double-parallel-branch horizontal communication well, which comprises the following steps: (1) completing drilling of a vertical well section, an inclined section and a horizontal section of the horizontal well A; (2) completing drilling of a straight well section and an inclined section of the horizontal well B, wherein the well mouth distance L of the double horizontal wells is adaptive to the size of a well field of the double horizontal wells; (3) drilling the horizontal section of the horizontal well B continuously, and pulling out the drill and replacing the drill with a drilling tool assembly with a strong magnetic joint when the drill is 80m away from the communicated target point of the horizontal well A; (4) jacking a magnetic guide instrument to a communication target point of the horizontal well A; (5) and adjusting the well track of the horizontal well B to reach the communication target point of the horizontal well A, and then lowering the completion pipe column after communication is completed. The invention has the following beneficial effects: the land acquisition area is reduced when the well position is deployed on the ground, the two horizontal wells are communicated through the tail ends, the horizontal length is doubled, the coal bed contact area is increased, the coal bed gas drainage rate is improved, and the single well yield is improved.
Description
Technical Field
The invention belongs to the field of coal bed gas exploitation and coal gasification, and particularly relates to a construction method of a double-parallel-branch horizontal communication well.
Background
With the increasing demand for energy and the increasing shortage of conventional oil and gas resources due to the continuous development of economy, countries in the world are actively seeking to develop new energy to make up for the gap of conventional oil and gas resources. The coal bed gas resources are reasonably developed, so that the occurrence of mine accidents can be greatly reduced, and the dependence of national economy on conventional oil gas resources is reduced.
China coal bed gas resources are rich, but the coal bed gas resources have geological characteristics of low permeability, low pressure, low saturation, structural coal development, strong heterogeneity of coal reservoirs and the like, and the development of the coal bed gas through conventional ground vertical wells and directional wells is not a development technology particularly suitable for the characteristics of the China coal bed gas reservoir.
The existing well type which is developed relatively mature is a U-shaped well, and the U-shaped well is often difficult to land acquisition, shallow coal seam burial, incapable of being effectively covered by one well, low in drilling rate, small in area of coal seam contact and the like in the actual coal bed gas drilling process.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the problems in the prior art, the invention discloses a construction method of a double-parallel-branch horizontal communication well, which is used for enriching the well type of the coal bed gas drainage and production completion and overcomes the defects that one horizontal well has small area with a coal bed contact layer and cannot completely cover a drainage and production surface.
The technical scheme is as follows: a construction method of a double-parallel branch horizontal communication well comprises the following steps:
(1) completing drilling of a vertical well section, an inclined section and a horizontal section of the horizontal well A;
(2) completing drilling of a straight well section and an inclined section of the horizontal well B, wherein the well mouth distance L of the double horizontal wells is adaptive to the size of a well field of the double horizontal wells;
(3) the drilling of the horizontal section of the horizontal well B is continued, and when the distance from the position of 80m of the communicated target point of the horizontal well A is short, the drilling tool is pulled out and replaced by a drilling tool assembly with a strong magnetic joint, wherein:
the horizontal distance H of the horizontal section of the double horizontal well is 50-100 m;
(4) jacking a magnetic guide instrument to a communication target point of the horizontal well A;
(5) and adjusting the well track of the horizontal well B to reach the communication target point of the horizontal well A, and then lowering the completion pipe column after communication is completed.
Further, the step (1) comprises the following steps:
(11) completing the drilling of the vertical well section of the horizontal well A, and setting a first vertical well section casing in the vertical well section of the horizontal well A, wherein: the bottom end of the vertical well section of the horizontal well A is lowered to be at least 20m below bedrock;
(12) the drilling of the deflecting section of the horizontal well A is completed, and a first deflecting section sleeve is put into the deflecting section of the horizontal well A, wherein: the bottom of the deflecting section of the horizontal well A is landed to a target layer;
(13) completing drilling of a horizontal section of the horizontal well A, and setting a first horizontal section sleeve in the horizontal section of the horizontal well A, wherein a glass fiber reinforced plastic sleeve is sleeved at the front end of the first horizontal section sleeve, and the region where the glass fiber reinforced plastic sleeve is located is a communicated target point;
furthermore, in the step (1), the drilling of the vertical well section, the deflecting section and the horizontal section of the horizontal well A, the drilling of the vertical well section and the deflecting section of the horizontal well B in the step (2) and part of the horizontal section of the horizontal well B are all directional drilling tools which are a drill bit, a screw rod, a non-magnetic joint and a drill rod which are sequentially connected.
Further, in the step (12), the target layer is in a coal seam, or a coal seam roof and a coal seam floor.
Further, the inner diameter of the completion pipe string of the horizontal well A in the step (1) is larger than 90 mm.
Further, the step (2) comprises the following steps:
(21) completing the drilling of the straight well section of the horizontal well B, and setting a second straight well section sleeve in the straight well section of the horizontal well B, wherein: the bottom end of the vertical well section of the horizontal well B is lowered to be at least 20m below bedrock;
(12) the drilling of the deflecting section of the horizontal well B is completed, and a second deflecting section sleeve is put into the deflecting section of the horizontal well B, wherein: and the bottom of the deflecting section of the horizontal well B is landed to a target layer.
Further, in the step (4), the jacking tool selects an oil pipe and a non-magnetic drill collar, the magnetic guide instrument is placed in the non-magnetic drill collar and is sent to the communicated target point of the horizontal well A along the first horizontal section of the casing pipe, and the instrument is prevented from being damaged when the magnetic guide instrument is jacked.
Further, in the step (5), in the drilling process of the connected section, track measurement is carried out every 3m of drilling, and the measuring process is as follows:
51) after drilling for 3m, lifting the drilling tool;
52) the magnetic guide instrument is placed down at a constant speed, and one point is collected every 0.5 m;
53) and analyzing after data is collected, adjusting the tool surface according to the analysis result, and drilling towards the communicated target point.
Further, in the step (4), the magnetic guide instrument is jacked into the glass fiber reinforced plastic sleeve by the through cable and the protection device at the joint of the through cable through an oil pipe and is placed 5m below the top of the glass fiber reinforced plastic sleeve.
Furthermore, two non-magnetic drill collars are required to be added at the bottom of the oil pipe, so that the magnetic steering instrument is prevented from being blocked in the jacking process.
Further, the horizontal well A is well-cemented by casing or open hole, and the horizontal well B is well-cemented by casing or open hole.
Has the advantages that: the invention discloses a construction method of a double parallel branch horizontal communication well, which has the following beneficial effects:
the land acquisition area is reduced when the well position is deployed on the ground, the two horizontal wells are communicated through the tail ends, the horizontal length is doubled, the coal bed contact area is increased, the coal bed gas drainage rate is improved, and the single well yield is improved.
Drawings
FIG. 1 is a schematic diagram of a dual horizontal well configuration.
FIG. 2 is a schematic view of a magnetic guide instrument in a deployed position.
Wherein:
1-A horizontal well
11-first straight well section casing 12-first deflecting section casing
13-first horizontal segment casing
2-B horizontal well
21-second straight well section casing 22-second deflecting section casing
23-second horizontal section casing 24-drill change-over point
3-communicating target 31-glass fiber reinforced plastic sleeve
4-oil pipe
5-nonmagnetic joint
6-magnetic guide instrument
7-feedthrough cable
Horizontal distance of horizontal section of H-double horizontal well
Well head distance of L-double horizontal well
The specific implementation mode is as follows:
the following describes in detail specific embodiments of the present invention.
Detailed description of the preferred embodiment 1
As shown in fig. 1 and 2, a construction method of a double parallel branch horizontal communication well comprises the following steps:
(1) completing drilling of a vertical well section, an inclined section and a horizontal section of the horizontal well A;
(2) completing drilling of a straight well section and an inclined section of the horizontal well B, wherein the well mouth distance L of the double horizontal wells is adaptive to the size of a well field of the double horizontal wells;
(3) and continuing to drill the horizontal section of the horizontal well B, and when the distance from the 80m position (namely a drilling tool replacement point 24) of the communication target point 3 of the horizontal well A1 to the drilling tool replacement point, tripping and replacing the drilling tool assembly with a drilling tool with a strong magnetic joint, wherein:
the horizontal distance H of the horizontal section of the double horizontal well is 50 m;
(4) jacking a magnetic guide instrument 6 to a communicated target point 3 of the horizontal well 1A;
(5) and adjusting the borehole trajectory of the horizontal well 2B to reach the communication target point 3 of the horizontal well 1A, and completing the communication and then lowering a completion pipe string (a second horizontal section casing 23).
The communication basis of the horizontal well 1A and the horizontal well 2B is as follows: and a magnetic steering instrument 6 in the horizontal well 1A analyzes the azimuth, the vertical depth deviation and the residual distance of a communication target point 3 of the horizontal well drill bit B and the horizontal well 1A according to the signal intensity of the rotating magnetic field of the strong magnetic joint in the horizontal well drill tool assembly B, so that the relative spatial position of the drill bit and the butt joint target point is calculated, and the track direction of the horizontal well drill bit 2B is adjusted according to the prompted azimuth deviation and vertical depth deviation, so that the communication purpose is achieved.
Further, the step (1) comprises the following steps:
(11) completing the drilling of the vertical well section of the horizontal well A, and setting a first vertical well section casing 11 in the vertical well section of the horizontal well A, wherein: the bottom end of the vertical well section of the horizontal well A is lowered to be at least 20m below bedrock;
(12) the drilling of the deflecting section of the horizontal well A is completed, and a first deflecting section casing pipe 12 is put into the deflecting section of the horizontal well A, wherein: the bottom of the deflecting section of the horizontal well A is landed to a target layer;
(13) completing drilling of the horizontal section of the horizontal well A, and setting a first horizontal section sleeve 13 in the horizontal section of the horizontal well A, wherein a glass steel sleeve 31 (providing a communicating nonmagnetic environment) is sleeved at the front end of the first horizontal section sleeve 13, and the region where the glass steel sleeve 31 is located is a communicating target point 3;
further, in the step (1), the drilling of the vertical well section, the deflecting section and the horizontal section of the horizontal well A, the drilling of the vertical well section and the deflecting section of the horizontal well B in the step (2) and part of the horizontal section of the horizontal well B are all directional drilling tools which are a drill bit, a screw rod, a non-magnetic joint 5 and a drill rod which are sequentially connected.
Further, the target layer in the step (12) is a coal seam.
Further, the inner diameter of the completion pipe string of the horizontal well 1A in the step (1) is larger than 90 mm.
Further, the step (2) comprises the following steps:
(21) completing the drilling of the straight well section of the horizontal well B, and setting a second straight well section casing 21 in the straight well section of the horizontal well B, wherein: the bottom end of the vertical well section of the horizontal well B is lowered to be at least 20m below bedrock;
(12) completing drilling of a deflecting section of the B horizontal well, and setting a second deflecting section casing 22 in the deflecting section of the B horizontal well, wherein: and the bottom of the deflecting section of the horizontal well B is landed to a target layer.
Further, in the step (4), the jacking tool selects an oil pipe 4 and a non-magnetic drill collar, the magnetic guide instrument 6 is placed in the non-magnetic drill collar and is sent to the position of the communicated target point 3 of the horizontal well 1A along the first horizontal section casing 13, and the instrument is prevented from being damaged by resistance when the magnetic guide instrument 6 is jacked.
Further, in the step (5), in the drilling process of the connected section, track measurement is carried out every 3m of drilling, and the measuring process is as follows:
51) after drilling for 3m, lifting the drilling tool;
52) the device is placed at a constant speed, and a magnetic guide instrument 6 collects one point every 0.5 m;
53) and analyzing after data are collected, adjusting the tool surface according to the analysis result, and drilling towards the communicated target point 3.
Further, in the step (4), the magnetic guide instrument 6 is jacked into the glass fiber reinforced plastic sleeve 31 through the through cable 7 and the protection device at the joint of the through cable 7 by using the oil pipe 4 and is placed 5m below the top of the glass fiber reinforced plastic sleeve 31.
Furthermore, two non-magnetic drill collars are required to be added at the bottom of the oil pipe 4 to prevent the magnetic steering instrument 6 from being blocked in the jacking process;
further, the horizontal well 1A is used for casing well cementation and completion, and the horizontal well 2B is used for casing well cementation and completion.
Specific example 2
Substantially the same as in example 1, except that:
the horizontal distance H of the horizontal section of the double horizontal well is 100 m;
in the step (12), the target layer is a coal seam roof;
a, completing a horizontal well 1 by an open hole; horizontal well 2B is an open hole completion.
Specific example 2
Substantially the same as in example 1, except that:
the horizontal distance H of the horizontal section of the double horizontal well is 70 m;
in the step (12), the target layer is a coal seam floor;
a, a horizontal well 1 is a casing well cementation and completion well; and the horizontal well 2B is completed by an open hole.
The embodiments of the present invention have been described in detail. However, the present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
Claims (10)
1. A construction method of a double-parallel branch horizontal communication well is characterized by comprising the following steps:
(1) completing drilling of a vertical well section, an inclined section and a horizontal section of the horizontal well A;
(2) completing drilling of a straight well section and an inclined section of the horizontal well B, wherein the well mouth distance L of the double horizontal wells is adaptive to the size of a well field of the double horizontal wells;
(3) the drilling of the horizontal section of the horizontal well B is continued, and when the distance from the position of 80m of the communicated target point of the horizontal well A is short, the drilling tool is pulled out and replaced by a drilling tool assembly with a strong magnetic joint, wherein:
the horizontal distance H of the horizontal section of the double horizontal well is 50-100 m;
(4) jacking a magnetic guide instrument to a communication target point of the horizontal well A;
(5) and adjusting the well track of the horizontal well B to reach the communication target point of the horizontal well A, and then lowering the completion pipe column after communication is completed.
2. The construction method of the double parallel branch horizontal communication well as claimed in claim 1, wherein the step (1) comprises the steps of:
(11) completing the drilling of the vertical well section of the horizontal well A, and setting a first vertical well section casing in the vertical well section of the horizontal well A, wherein: the bottom end of the vertical well section of the horizontal well A is lowered to be at least 20m below bedrock;
(12) the drilling of the deflecting section of the horizontal well A is completed, and a first deflecting section sleeve is put into the deflecting section of the horizontal well A, wherein: the bottom of the deflecting section of the horizontal well A is landed to a target layer;
(13) and drilling the horizontal section of the horizontal well A, and putting a first horizontal section sleeve into the horizontal section of the horizontal well A, wherein the front end of the first horizontal section sleeve is sleeved with a glass fiber reinforced plastic sleeve, and the region where the glass fiber reinforced plastic sleeve is located is a communicated target point.
3. The construction method of the double parallel branch horizontal communication well as defined in claim 2, wherein the target layer in the step (12) is a coal seam or a coal seam roof and a coal seam floor.
4. The construction method of the double-parallel-branch horizontal communication well according to claim 1, wherein directional drilling tools are adopted in the step (1) for drilling the vertical well section, the deflecting section and the horizontal section of the A horizontal well, the step (2) for drilling the vertical well section and the deflecting section of the B horizontal well and part of the horizontal section of the B horizontal well, and the directional drilling tools are a drill bit, a screw rod, a non-magnetic joint and a drill rod which are sequentially connected.
5. The construction method of the double-parallel-branch horizontal communication well as defined in claim 1, wherein in the step (1), the inner diameter of the completion pipe string of the A horizontal well is larger than 90mm, the A horizontal well is casing cementing completion or open hole completion, and the B horizontal well is casing cementing completion or open hole completion.
6. The construction method of the double parallel branch horizontal communication well as claimed in claim 1, wherein the step (2) comprises the steps of:
(21) completing the drilling of the straight well section of the horizontal well B, and setting a second straight well section sleeve in the straight well section of the horizontal well B, wherein: the bottom end of the vertical well section of the horizontal well B is lowered to be at least 20m below bedrock;
(12) the drilling of the deflecting section of the horizontal well B is completed, and a second deflecting section sleeve is put into the deflecting section of the horizontal well B, wherein: and the bottom of the deflecting section of the horizontal well B is landed to a target layer.
7. The construction method of the double-parallel-branch horizontal communication well as claimed in claim 1, wherein in the step (4), the jacking tool is selected from an oil pipe and a non-magnetic drill collar, and the magnetic guide instrument is placed in the non-magnetic drill collar and sent to the communication target point of the horizontal well A along the first horizontal section of casing pipe, so that the instrument is prevented from being damaged by resistance when the magnetic guide instrument is jacked.
8. The construction method of the double parallel branch horizontal communication well as defined in claim 1, wherein in the step (5), during the drilling process of the communication section, the track measurement is performed every 3m drilled, and the measurement process is as follows:
51) after drilling for 3m, lifting the drilling tool;
52) the magnetic guide instrument is placed down at a constant speed, and one point is collected every 0.5 m;
53) and analyzing after data is collected, adjusting the tool surface according to the analysis result, and drilling towards the communicated target point.
9. The method for constructing the double parallel branch horizontal communication well according to claim 1, wherein in the step (4), the magnetic guide instrument is jacked into the glass fiber reinforced plastic sleeve by the through cable and the protection device at the joint of the through cable through the oil pipe and is placed 5m below the top of the glass fiber reinforced plastic sleeve.
10. The method for constructing the horizontal communication well with the double parallel branches as claimed in claim 9, wherein two non-magnetic drill collars are added at the bottom of the oil pipe to prevent the magnetic guide instrument from being blocked during the jacking process.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113156534A (en) * | 2021-04-19 | 2021-07-23 | 广州探霸仪器有限公司 | Control method, device and equipment of detection system and storage medium |
| CN114909119A (en) * | 2022-04-29 | 2022-08-16 | 大庆辰平钻井技术服务有限公司 | Drilling method for converting original vertical well or inclined well into U-shaped geothermal well with ultra-short radius |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1515783A (en) * | 2003-08-29 | 2004-07-28 | 化工部长沙设计研究院 | Method for exploiting natural alkali mineral by utilizing horizontal butt well |
| US20080000686A1 (en) * | 2006-06-30 | 2008-01-03 | Vector Magnetics Llc | Elongated cross coil assembly for use in borehole location determination |
| CN103216234A (en) * | 2013-04-23 | 2013-07-24 | 中国地质科学院勘探技术研究所 | Horizontal branch multi-well-group butted well and construction method thereof |
| CN104196453A (en) * | 2014-08-29 | 2014-12-10 | 富地柳林燃气有限公司 | Coalbed methane development well |
| CN110043229A (en) * | 2019-04-02 | 2019-07-23 | 广州海洋地质调查局 | A kind of more well group connection convergence recovery methods of Gas Hydrate In Sea Areas |
-
2021
- 2021-01-25 CN CN202110098242.9A patent/CN112796660B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1515783A (en) * | 2003-08-29 | 2004-07-28 | 化工部长沙设计研究院 | Method for exploiting natural alkali mineral by utilizing horizontal butt well |
| US20080000686A1 (en) * | 2006-06-30 | 2008-01-03 | Vector Magnetics Llc | Elongated cross coil assembly for use in borehole location determination |
| CN103216234A (en) * | 2013-04-23 | 2013-07-24 | 中国地质科学院勘探技术研究所 | Horizontal branch multi-well-group butted well and construction method thereof |
| CN104196453A (en) * | 2014-08-29 | 2014-12-10 | 富地柳林燃气有限公司 | Coalbed methane development well |
| CN110043229A (en) * | 2019-04-02 | 2019-07-23 | 广州海洋地质调查局 | A kind of more well group connection convergence recovery methods of Gas Hydrate In Sea Areas |
Non-Patent Citations (1)
| Title |
|---|
| 姜汝德等: "煤层气水平多分支井连通技术", 《现代商贸工业》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113156534A (en) * | 2021-04-19 | 2021-07-23 | 广州探霸仪器有限公司 | Control method, device and equipment of detection system and storage medium |
| CN114909119A (en) * | 2022-04-29 | 2022-08-16 | 大庆辰平钻井技术服务有限公司 | Drilling method for converting original vertical well or inclined well into U-shaped geothermal well with ultra-short radius |
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| CN112796660B (en) | 2023-06-16 |
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