CN113323601A - Radial adjustment type sucker rod centralizer - Google Patents
Radial adjustment type sucker rod centralizer Download PDFInfo
- Publication number
- CN113323601A CN113323601A CN202110732904.3A CN202110732904A CN113323601A CN 113323601 A CN113323601 A CN 113323601A CN 202110732904 A CN202110732904 A CN 202110732904A CN 113323601 A CN113323601 A CN 113323601A
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- radial
- positioning
- rod
- driving
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- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 239000002893 slag Substances 0.000 claims description 11
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 230000035515 penetration Effects 0.000 claims description 3
- 238000005086 pumping Methods 0.000 description 5
- 239000003921 oil Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Classifications
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1071—Wear protectors; Centralising devices, e.g. stabilisers specially adapted for pump rods, e.g. sucker rods
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a radial adjusting type sucker rod centralizer, which comprises an annular cylinder, a roller mechanism and a radial driving assembly, wherein the annular cylinder is provided with a plurality of radial driving rollers; the invention changes the structure of the traditional centralizer, a plurality of roller mechanisms which can be stretched and floated are uniformly arranged on the radial periphery of an annular cylinder of a centralizer body, when one end of a driving screw is screwed in the internal thread of a positioning threaded cylinder, a driving ring is driven to axially move, so that the driving ring is pressed against a driven inclined plate to radially move outwards, and finally a radial floating block, a radial floating rod and the roller mechanism are driven to radially move outwards to realize the expansion of the radial centralizing width.
Description
Technical Field
The invention relates to a radial adjusting type sucker rod centralizer.
Background
At present, the pumping unit is widely used in oil fields, crude oil is pumped out of the ground by connecting pumping rods and driving a plunger piston positioned in the deep part of the oil well, when in use, a plurality of sections of pumping rods are connected by a connector for use, because the pumping rods are slender rods, the stability of the sucker rod is poor during the reciprocating oil pumping movement, so in order to increase the telescopic stability of the sucker rod, and the axial position of the sucker rod is ensured, the sucker rod is generally provided with a centralizer to improve the movement stability of the sucker rod, the existing centralizer is generally centered by mounting a plurality of rollers which are axially distributed and have different angles on a centralizer body, but the centralizer with the structure can not adjust the radial position of the roller, so the centralizer can not adjust the different centralizing intervals according to the radial sizes of different deep wells, therefore, the centralizer is not flexible to use, and the radial centralizing distance cannot be adjusted according to the actual situation.
Disclosure of Invention
Aiming at the defects of the prior art, the invention solves the problems that: provides a radial adjusting type sucker rod centralizer which can adjust different centralizing intervals according to the radial size of a deep well.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
a radial adjusting type sucker rod centralizer comprises an annular cylinder, a roller mechanism and a radial driving assembly; a plurality of through connecting grooves are uniformly formed in the periphery of the middle of the annular column body; a roller mechanism is respectively arranged in the cross connecting grooves; the radial driving component comprises a positioning threaded barrel, a driving screw, a driving ring, a driven inclined plate, a radial floating block, a radial floating rod and a pressing elastic body; a positioning threaded cylinder is arranged in one end of the annular cylinder; the inner sides of the roller mechanisms are respectively provided with a radial floating rod; the radial floating rod radially slides to penetrate through the penetrating groove and then extends to the inside of the annular column body; the inner ends of the radial floating rods are respectively provided with a radial floating block; the radial floating rods are respectively sleeved with a pressing elastic body; the pressing elastic body elastically presses the radial floating block outwards; one end of each radial floating block is provided with a driven inclined plate which is distributed in an inclined way; one end of the driving screw is in threaded rotary connection with the inside of the positioning threaded cylinder at one end of the annular cylinder, and the other end of the driving screw extends to the other end of the annular cylinder; a driving ring is arranged on the outer side of the periphery of the driving screw rod; when the driving ring rotates and moves axially, the driving ring drives the plurality of driven inclined plates to move radially.
Further, the roller mechanism comprises a separated roller, a positioning shaft, a cross-connecting screw rod, a positioning ring and a fastening threaded ring; the cross-connecting screw rod is arranged at the outer end of the radial floating rod and is positioned in the cross-connecting groove; a positioning ring is arranged on the cross-connecting screw rod; the cross-connecting screw rod is connected with a positioning shaft in a cross-connecting mode, and the positioning shaft abuts against the outer side of the positioning ring; two ends of the positioning shaft are respectively rotatably clamped with a separate roller; a slag channel is arranged between the separated rollers; the fastening thread ring is in threaded rotary connection with the penetrating screw rod and abuts against the outer side of the positioning shaft.
Furthermore, a through hole is arranged in the middle of the positioning shaft; the positioning shaft is connected to the cross-connecting screw rod in a cross-connecting mode through a cross-connecting through hole in the middle.
Furthermore, the inner sides of the separated rollers are respectively provided with a rotary clamping groove; two sides of the positioning shaft are respectively provided with a rotary clamping tooth; the separating type idler wheel is rotationally clamped on the rotational clamping teeth at two sides of the positioning shaft through the rotational clamping grooves at the inner side.
Furthermore, a cross-connecting channel is arranged in the driving screw rod and communicated with the positioning thread cylinder.
Furthermore, two sliding clamping grooves are respectively arranged at two ends of the inner side of the through connecting groove; sliding clamping teeth are arranged on two sides of the radial floating rod; the radial floating rod is connected to the sliding clamping groove in a sliding clamping mode through sliding clamping teeth on two sides.
Furthermore, the positioning threaded cylinder is fixed on the inner axis of the annular column body through an upper positioning rod and a lower positioning rod.
The invention has the advantages of
1. The invention changes the structure of the traditional centralizer, a plurality of roller mechanisms which can be stretched and floated are uniformly arranged on the radial periphery of an annular cylinder of a centralizer body, when one end of a driving screw is screwed in the internal thread of a positioning threaded cylinder, a driving ring is driven to axially move, so that the driving ring is pressed against a driven inclined plate to radially move outwards, and finally a radial floating block, a radial floating rod and the roller mechanism are driven to radially move outwards to realize the expansion of the radial centralizing width.
2. The roller mechanism is designed to be of a separated structure, two ends of the positioning shaft are respectively and rotatably clamped with one separated roller, a slag channel is arranged between the separated rollers, so that when the separated rollers roll on the inner wall of a well, slag blocks can pass through the slag channel when encountering the slag blocks on the wall of the well, and the rolling and righting smoothness of the rollers is improved.
Drawings
Fig. 1 is a schematic axial structure of the present invention.
Fig. 2 is a schematic view of the radial structure of the present invention.
Fig. 3 is a partially enlarged structural view of fig. 1 according to the present invention.
Fig. 4 is a partially enlarged structural view of fig. 2 according to the present invention.
Fig. 5 is a partially enlarged structural view of fig. 4 according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 5, a radial adjusting type sucker rod centralizer comprises an annular cylinder 1, a roller mechanism 3 and a radial driving assembly 2; a plurality of through connecting grooves 11 are uniformly formed in the periphery of the middle of the annular column body 1; the roller mechanisms 3 are respectively arranged in the penetration grooves 11; the radial driving component 2 comprises a positioning threaded barrel 21, a driving screw 22, a driving ring 23, a driven inclined plate 24, a radial slider 25, a radial floating rod 26 and a pressing elastic body 27; a positioning threaded cylinder 21 is arranged in one end of the annular column body 1; a radial floating rod 26 is respectively arranged on the inner sides of the roller mechanisms 3; the radial floating rod 26 radially slides to penetrate through the through groove 11 and then extends to the inside of the annular column body 1; the inner ends of the radial floating rods 26 are respectively provided with a radial floating block 25; the radial floating rods 26 are respectively sleeved with a pressing elastic body 27; the pressing elastic body 27 elastically presses the radial floating block 25 towards the outside; one end of each radial floating block 25 is respectively provided with a driven inclined plate 24 which is distributed in an inclined way; one end of the driving screw 22 is in threaded rotary connection with the inside of the positioning threaded cylinder 21 at one end of the annular cylinder 1, and the other end of the driving screw 22 extends to the other end of the annular cylinder 1; a driving ring 23 is arranged on the outer side of the periphery of the driving screw 22; when the driving ring 23 rotates and moves axially, the plurality of driven swash plates 24 are driven to move radially.
As shown in fig. 1 to 5, it is further preferable that the roller mechanism 3 includes a separation roller 35, a positioning shaft 32, a threaded screw 31, a positioning ring 33, and a fastening threaded ring 34; the penetrating screw rod 31 is arranged at the outer end of the radial floating rod 26 and is positioned in the penetrating groove 11; a positioning ring 33 is arranged on the cross-over screw rod 31; a positioning shaft 32 is connected to the penetrating screw rod 31 in a penetrating manner, and the positioning shaft 32 abuts against the outer side of the positioning ring 33; two ends of the positioning shaft 32 are respectively rotatably clamped with a separate roller 35; a slag channel 36 is arranged between the separated rollers 35; the fastening screw ring 34 is screwed on the threaded screw 31 and pressed against the outside of the positioning shaft 32. Further, a through hole 322 is provided in the middle of the positioning shaft 32; the positioning shaft 32 is threaded on the threaded screw 31 through a middle through hole 322. Further, a rotary clamping groove 351 is respectively arranged on the inner side of the separate roller 35; two sides of the positioning shaft 32 are respectively provided with a rotary clamping tooth 321; the separable roller 35 is rotatably engaged with the rotation engaging teeth 321 on both sides of the positioning shaft 32 through the rotation engaging groove 351 on the inner side. Further, a penetration passage 221 is provided inside the drive screw 22 and is provided to penetrate the positioning threaded cylinder 21. Further, two sliding clamping grooves 12 are respectively arranged at two ends of the inner side of the through connecting groove 11; sliding clamping teeth 261 are arranged on two sides of the radial floating rod 26; the radial floating rod 26 is radially and slidably clamped on the sliding clamping groove 12 through the sliding clamping teeth 261 on the two sides. Further, the positioning threaded cylinder 21 is fixed to the inner axis of the annular column 1 by upper and lower positioning rods 211.
The invention changes the structure of the traditional centralizer, a plurality of roller mechanisms 3 which can be stretched and floated are uniformly arranged on the radial periphery of an annular cylinder 1 of a centralizer body, when one end of a driving screw 22 is screwed in the internal thread of a positioning thread cylinder 21, the driving ring 23 is driven to move axially, so that the driving ring 23 is pressed against a driven inclined plate to move outwards in the radial direction 24, and finally a radial floating block 25, a radial floating rod 26 and the roller mechanisms 3 are driven to move outwards in the radial direction, thereby realizing the expansion of the radial centralizing width, when one end of the driving screw 22 is screwed out of the internal thread of the positioning thread cylinder 21, the driving ring 23 is separated from the driven inclined plate 24, and at the moment, the radial floating block 25 is pressed inwards by a pressing elastic body 27, thereby realizing the reduction of the radial centralizing width and realizing the flexible adjustment.
The roller mechanism 3 is designed to be of a separated structure, two ends of the positioning shaft 32 are respectively provided with the separated rollers 35 in a rotating and clamping mode, the slag passing channel 36 is arranged between the separated rollers 35, when the separated rollers 35 roll on the inner wall of a well, slag blocks can pass through the slag passing channel 36 when encountering the slag blocks on the wall of the well, and the rolling and righting smoothness of the rollers is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A radial adjustment type sucker rod centralizer is characterized by comprising an annular cylinder, a roller mechanism and a radial driving assembly; a plurality of through connecting grooves are uniformly formed in the periphery of the middle of the annular column body; a roller mechanism is respectively arranged in the cross connecting grooves; the radial driving component comprises a positioning threaded barrel, a driving screw, a driving ring, a driven inclined plate, a radial floating block, a radial floating rod and a pressing elastic body; a positioning threaded cylinder is arranged in one end of the annular cylinder; the inner sides of the roller mechanisms are respectively provided with a radial floating rod; the radial floating rod radially slides to penetrate through the penetrating groove and then extends to the inside of the annular column body; the inner ends of the radial floating rods are respectively provided with a radial floating block; the radial floating rods are respectively sleeved with a pressing elastic body; the pressing elastic body elastically presses the radial floating block outwards; one end of each radial floating block is provided with a driven inclined plate which is distributed in an inclined way; one end of the driving screw is in threaded rotary connection with the inside of the positioning threaded cylinder at one end of the annular cylinder, and the other end of the driving screw extends to the other end of the annular cylinder; a driving ring is arranged on the outer side of the periphery of the driving screw rod; when the driving ring rotates and moves axially, the driving ring drives the plurality of driven inclined plates to move radially.
2. The radially adjustable sucker rod centralizer of claim 1, wherein the roller mechanism comprises a split roller, a positioning shaft, a cross-over screw, a positioning ring, a fastening threaded ring; the cross-connecting screw rod is arranged at the outer end of the radial floating rod and is positioned in the cross-connecting groove; a positioning ring is arranged on the cross-connecting screw rod; the cross-connecting screw rod is connected with a positioning shaft in a cross-connecting mode, and the positioning shaft abuts against the outer side of the positioning ring; two ends of the positioning shaft are respectively rotatably clamped with a separate roller; a slag channel is arranged between the separated rollers; the fastening thread ring is in threaded rotary connection with the penetrating screw rod and abuts against the outer side of the positioning shaft.
3. The radially adjustable sucker rod centralizer of claim 2, wherein the positioning shaft is provided with a through hole in the middle; the positioning shaft is connected to the cross-connecting screw rod in a cross-connecting mode through a cross-connecting through hole in the middle.
4. The radial adjustable sucker rod centralizer of claim 2, wherein the inner sides of the separate rollers are respectively provided with a rotary clamping groove; two sides of the positioning shaft are respectively provided with a rotary clamping tooth; the separating type idler wheel is rotationally clamped on the rotational clamping teeth at two sides of the positioning shaft through the rotational clamping grooves at the inner side.
5. The radially adjustable sucker rod centralizer of claim 1, wherein the drive screw has a passage defined therein and is disposed in communication with the set screw barrel.
6. The radial adjustable sucker rod centralizer according to claim 1, wherein the inner ends of the penetration grooves are respectively provided with a sliding clamping groove; sliding clamping teeth are arranged on two sides of the radial floating rod; the radial floating rod is connected to the sliding clamping groove in a sliding clamping mode through sliding clamping teeth on two sides.
7. The radial adjustable sucker rod centralizer of claim 1, wherein the positioning threaded cylinder is fixed to the inner core of the annular cylinder by two positioning rods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110732904.3A CN113323601A (en) | 2021-06-30 | 2021-06-30 | Radial adjustment type sucker rod centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110732904.3A CN113323601A (en) | 2021-06-30 | 2021-06-30 | Radial adjustment type sucker rod centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113323601A true CN113323601A (en) | 2021-08-31 |
Family
ID=77423404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110732904.3A Withdrawn CN113323601A (en) | 2021-06-30 | 2021-06-30 | Radial adjustment type sucker rod centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113323601A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113983044A (en) * | 2021-10-25 | 2022-01-28 | 领胜城科技（江苏）有限公司 | Correction regulation formula nanocrystalline hot pressing laminating device |
| CN114165173A (en) * | 2021-12-14 | 2022-03-11 | 江苏和信石油机械有限公司 | Quick assembly type drill rod and drill bit structure for rescue |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2039199C1 (en) * | 1993-02-11 | 1995-07-09 | Научно-производственная фирма "Эридан-Экспо" | Hydraulic centralizer |
| US20050098353A1 (en) * | 2003-11-07 | 2005-05-12 | Halliburton Energy Services, Inc. | Variable gauge drilling apparatus and method of assembly thereof |
| CN101435314A (en) * | 2008-12-19 | 2009-05-20 | 中国海洋石油总公司 | Non-rotating outer liner stabilizing device of rotating guide drilling tool |
| CN201943610U (en) * | 2011-01-11 | 2011-08-24 | 江苏力克石油机械有限公司 | Sucker rod wear-resisting idler wheel centering device |
| CN205370466U (en) * | 2016-01-12 | 2016-07-06 | 胜利油田高原石油装备有限责任公司 | Ocean is bored and is repaiied all -in -one centralizer |
| CN205840807U (en) * | 2016-07-04 | 2016-12-28 | 西南石油大学 | A kind of reducing rolling wheel centralizer |
| GB2545914A (en) * | 2015-12-30 | 2017-07-05 | Huyton Stuart | Adjustable roller centralizer |
| CN106939767A (en) * | 2017-05-15 | 2017-07-11 | 西南石油大学 | A kind of telescopic tool face stabilizer |
| CN108756775A (en) * | 2018-06-13 | 2018-11-06 | 大庆市晟威机械制造有限公司 | A kind of elastic oil pumping rod centering device in oil field |
| CN208267786U (en) * | 2018-04-13 | 2018-12-21 | 中国石油大学(华东) | A kind of down-hole oil tube flexibility centralizer |
| CN109505534A (en) * | 2018-12-10 | 2019-03-22 | 盐城庆隆机械有限公司 | A kind of novel elastic centralizer |
| CN208777919U (en) * | 2018-07-31 | 2019-04-23 | 大庆市晟威机械制造有限公司 | A kind of oil pumping rod centering device being oriented to |
| CN209892118U (en) * | 2019-04-15 | 2020-01-03 | 杨波 | Be applied to righting device of logging construction instrument |
| CN111363292A (en) * | 2020-04-24 | 2020-07-03 | 陕西欣宏氟塑机电工贸有限公司 | Modified nylon and centralizer produced by same |
| CN211174010U (en) * | 2020-06-30 | 2020-08-04 | 胜利方兰德石油装备股份有限公司 | Oil field horizontal well sand washing pipe |
| CN112012662A (en) * | 2020-10-20 | 2020-12-01 | 胜利油田固邦石油装备有限责任公司 | Lengthened PDC drill bit with centralizer |
| CN212225138U (en) * | 2020-05-27 | 2020-12-25 | 天津山远石油工具有限公司 | Telescopic casing centralizer |
-
2021
- 2021-06-30 CN CN202110732904.3A patent/CN113323601A/en not_active Withdrawn
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2039199C1 (en) * | 1993-02-11 | 1995-07-09 | Научно-производственная фирма "Эридан-Экспо" | Hydraulic centralizer |
| US20050098353A1 (en) * | 2003-11-07 | 2005-05-12 | Halliburton Energy Services, Inc. | Variable gauge drilling apparatus and method of assembly thereof |
| CN101435314A (en) * | 2008-12-19 | 2009-05-20 | 中国海洋石油总公司 | Non-rotating outer liner stabilizing device of rotating guide drilling tool |
| CN201943610U (en) * | 2011-01-11 | 2011-08-24 | 江苏力克石油机械有限公司 | Sucker rod wear-resisting idler wheel centering device |
| GB2545914A (en) * | 2015-12-30 | 2017-07-05 | Huyton Stuart | Adjustable roller centralizer |
| CN205370466U (en) * | 2016-01-12 | 2016-07-06 | 胜利油田高原石油装备有限责任公司 | Ocean is bored and is repaiied all -in -one centralizer |
| CN205840807U (en) * | 2016-07-04 | 2016-12-28 | 西南石油大学 | A kind of reducing rolling wheel centralizer |
| CN106939767A (en) * | 2017-05-15 | 2017-07-11 | 西南石油大学 | A kind of telescopic tool face stabilizer |
| CN208267786U (en) * | 2018-04-13 | 2018-12-21 | 中国石油大学(华东) | A kind of down-hole oil tube flexibility centralizer |
| CN108756775A (en) * | 2018-06-13 | 2018-11-06 | 大庆市晟威机械制造有限公司 | A kind of elastic oil pumping rod centering device in oil field |
| CN208777919U (en) * | 2018-07-31 | 2019-04-23 | 大庆市晟威机械制造有限公司 | A kind of oil pumping rod centering device being oriented to |
| CN109505534A (en) * | 2018-12-10 | 2019-03-22 | 盐城庆隆机械有限公司 | A kind of novel elastic centralizer |
| CN209892118U (en) * | 2019-04-15 | 2020-01-03 | 杨波 | Be applied to righting device of logging construction instrument |
| CN111363292A (en) * | 2020-04-24 | 2020-07-03 | 陕西欣宏氟塑机电工贸有限公司 | Modified nylon and centralizer produced by same |
| CN212225138U (en) * | 2020-05-27 | 2020-12-25 | 天津山远石油工具有限公司 | Telescopic casing centralizer |
| CN211174010U (en) * | 2020-06-30 | 2020-08-04 | 胜利方兰德石油装备股份有限公司 | Oil field horizontal well sand washing pipe |
| CN112012662A (en) * | 2020-10-20 | 2020-12-01 | 胜利油田固邦石油装备有限责任公司 | Lengthened PDC drill bit with centralizer |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113983044A (en) * | 2021-10-25 | 2022-01-28 | 领胜城科技（江苏）有限公司 | Correction regulation formula nanocrystalline hot pressing laminating device |
| CN113983044B (en) * | 2021-10-25 | 2023-03-24 | 领胜城科技（江苏）有限公司 | Correction regulation formula nanocrystalline hot pressing laminating device |
| CN114165173A (en) * | 2021-12-14 | 2022-03-11 | 江苏和信石油机械有限公司 | Quick assembly type drill rod and drill bit structure for rescue |
| CN114165173B (en) * | 2021-12-14 | 2023-07-25 | 江苏和信石油机械有限公司 | Quick assembly type drill rod and drill bit structure for rescue |
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Application publication date: 20210831 |
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