CN109403881B - Stabilizer with replaceable straight wings - Google Patents
Stabilizer with replaceable straight wings Download PDFInfo
- Publication number
- CN109403881B CN109403881B CN201811602368.XA CN201811602368A CN109403881B CN 109403881 B CN109403881 B CN 109403881B CN 201811602368 A CN201811602368 A CN 201811602368A CN 109403881 B CN109403881 B CN 109403881B
- Authority
- CN
- China
- Prior art keywords
- straight
- dovetail
- wing
- stabilizer
- pin shaft
- 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.)
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- 239000003381 stabilizer Substances 0.000 title claims abstract description 39
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 25
- 238000005553 drilling Methods 0.000 claims abstract description 17
- 230000000694 effects Effects 0.000 claims abstract description 5
- 230000002035 prolonged effect Effects 0.000 claims abstract description 4
- 238000005299 abrasion Methods 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 2
- 241000397426 Centroberyx lineatus Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
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
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
Landscapes
- 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 relates to a replaceable straight wing stabilizer, which can effectively solve the problems that a righting wing of a drill string stabilizer can only be used and can not be maintained and replaced on site, and the drilling period is prolonged. The device body is an inner through hole cylinder, the upper part is an inner thread buckle and is connected with the upper part of the drill column, the lower part is an outer thread buckle and is connected with the lower part of the drill column, the outer circle of the middle part is a cylindrical convex body with the outer expansion diameter larger than that of the cylinders at two ends, three to four straight dovetail grooves which are uniformly distributed at intervals are formed in the peripheral wall of the cylindrical convex body, the straight dovetail wings are inserted into the grooves and are tightly fixed with the device body, the lower part is in a dovetail form and is matched with the dovetail grooves, the upper part is provided with two chamfer angles to present a trapezoid shape, the opening end of the straight dovetail groove of the device body is provided with a traversing hole for inserting a stabilizing pin shaft to block the withdrawal channel of the straight dovetail wing, the bottom of the straight dovetail groove is provided with a screw hole of a fixing bolt, the stabilizing pin shaft is cylindrical, and the middle is provided with a thin neck, and the fixing bolt closely penetrates through the thin neck. The invention has good use effect, improves the safety of tools and prolongs the service life.
Description
Technical Field
The invention relates to petroleum drilling equipment, in particular to a replaceable straight wing stabilizer.
Background
In the drilling construction process, in order to ensure that the drilled hole forms a borehole according to engineering design requirements, a proper drill string stabilizer can be connected into the drill string according to the design requirements, the existing drill string stabilizer can be roughly divided into a fixed spiral stabilizer, a straight wing stabilizer, a roller stabilizer and a replaceable sleeve stabilizer, and the fixed wing stabilizer and the straight wing stabilizer are not replaceable.
Disclosure of Invention
Aiming at the situation, the invention aims to solve the defects of the prior art, and the invention aims to provide the replaceable straight wing stabilizer which can effectively solve the problems that the righting wing of the drill string stabilizer can only be used and can not be maintained and replaced on site, after drilling is used, tool inspection is started, and only if the abrasion of a product is found to be substandard, the on-site replacement can be performed, and the problem that the drilling quality is substandard or the drilling parameters can not be optimally implemented due to the fact that the tool cost is high is solved, so that the drilling period is prolonged.
The invention solves the technical scheme that the replaceable straight wing stabilizer comprises a stabilizer body, a stabilizing pin shaft and a straight Yan Weiyi, wherein the stabilizer body is a cylinder with an inner through hole, the upper part is an inner thread buckle connected with the upper part of a drill column, the lower part is an outer thread buckle connected with the lower part of the drill column, the outer circle of the middle part is a cylindrical convex body with the outward expansion diameter larger than that of the cylinders at two ends, three to four straight dovetail grooves which are uniformly distributed at intervals are formed in the peripheral wall of the cylindrical convex body, the length of the straight dovetail grooves corresponds to that of the corresponding straight dovetail wings, the straight dovetail wings are inserted into the grooves and are tightly fixed with the stabilizer body, the lower part of the straight dovetail grooves is matched with the dovetail grooves in a dovetail form, the upper parts of the straight dovetail grooves are chamfered to form a trapezoid, when the straight dovetail wings are inserted along the dovetail wings on the stabilizer body, transverse holes for inserting the stabilizing pin shaft are formed in the transverse holes at the opening ends of the straight dovetail wings, the straight dovetail wings exit channels for blocking the straight dovetail wings, fixing bolts are arranged at the bottoms of the straight dovetail wings, fixing bolts are arranged in the screw bolts, the straight dovetail wings are further fixed, the straight dovetail wings are fixed, the straight wings are fixed in the middle, the straight dovetail wings are required to be pulled out from the straight wings, and the right side when the straight dovetail wings are required to be removed from the right, and the right side, when the right side of a new dovetail wing is required to be replaced, and when the right is required to be replaced, and the right a right tail wing stabilizer is required to pass.
The invention has novel and unique structure, simplicity, reasonable structure and good use effect, improves the safety of tools, prolongs the service life, can replace the straight swallow tail wing on site, ensures that the diameter of a well bore of a drilled hole is unchanged, meets the actual requirements on site, effectively improves the drilling safety environment and the production efficiency, and is an innovation on a drill string stabilizer.
Drawings
FIG. 1 is a schematic cross-sectional view of the structure of the present invention.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the drawings.
The invention provides a replaceable straight wing stabilizer, which comprises a stabilizer body, a stabilizing pin shaft and a straight Yan Weiyi, wherein the stabilizer body 1 is a cylinder with an inner through hole, the upper part is an inner thread buckle 5 connected with the upper part of a drill column, the lower part is an outer thread buckle 6 connected with the lower part of the drill column, the outer circle of the middle part is a cylindrical convex body 7 with the outward expansion diameter larger than that of the cylinders at two ends, three to four straight dovetail grooves 9 which are uniformly distributed at intervals are formed in the peripheral wall of the cylindrical convex body 7, the lengths of the straight dovetail grooves correspond to the corresponding straight dovetail wings, the straight dovetail wings 4 are inserted into the grooves and are tightly fixed with the stabilizer body, the lower parts of the straight dovetail wings are matched with the dovetail grooves in a dovetail form, the upper parts of the straight dovetail wings are in a trapezoid shape, when the straight dovetail wings are inserted along the dovetail shafts on the stabilizer body 1, the opening ends of the straight dovetail grooves are provided with transverse perforations for inserting the stabilizing pin shaft 3, the straight dovetail shafts 3 are blocked, the exit channels for fixing the straight dovetail wings are arranged at the bottoms of the straight dovetail grooves, fixing bolts 2 are arranged on the circumference walls, the fixing bolts, the straight dovetail wings are prevented from exiting from the corresponding straight dovetail wings, the straight dovetail wings are required to be pulled out from the corresponding straight dovetail shafts, and the right-side fixing pins are required to be removed from the right, and the right-side of the straight dovetail wings only when the straight wings are required to be replaced, and when the straight dovetail wings are required to be removed from the right by the right and replaced.
In order to ensure the use effect, the internal thread buckle 5 is in a round hole groove shape with a big mouth and a small inner end and an internal thread on the hole wall;
the external thread fastener 6 is in a hollow cone shape with a small front end diameter and a large rear end diameter;
the center of the device body 1 is provided with a through hole 8 which penetrates up and down;
the straight dovetail wing 4 is in a flat plate shape, and two sides of the outer end face are inclined planes 4-1;
the two ends of the cylindrical convex body 7 are inclined planes 1-1.
According to the structure, the replaceable straight wing stabilizer comprises a body (main body), bolts, a stabilizing shaft and a straight Yan Weiyi, wherein the body 1 is a cylinder with an inner through hole, the upper part is an inner threaded buckle connected with the upper part of a drill column, the lower part is an outer threaded buckle connected with the lower part of the drill column, the outer circle of the middle part is cylindrical, three to four straight dovetail grooves are formed at one end of the cylindrical part and are not communicated, the length of the cylindrical part corresponds to that of the corresponding straight dovetail wing 4, the straight dovetail wing 4 is inserted into the cylindrical part, the lower part of the straight dovetail wing 4 is in a plate shape and is matched with the dovetail grooves, the upper part of the straight dovetail wing 4 is in a trapezoid shape, when the straight dovetail wing is inserted along the dovetail groove on the body 1, the opening end of the straight dovetail wing 1 is provided with a transverse through hole for inserting the stabilizing shaft 3, the bottom of the straight dovetail groove is provided with a screw hole for installing a fixing bolt 2, the stopping the exit of the stabilizing shaft 3, the further fixing straight dovetail wing 4 is cylindrical, the middle part is provided with a neck, and the straight dovetail wing 2 is completely removed from the position through the corresponding straight dovetail wing 4 through the right through the fixing shaft 3, and the right side of the straight dovetail wing 4 is required to be completely removed when the straight dovetail wing 4 is required to be replaced, and the straight dovetail wing 4 is completely removed from the right side after the right side of the body is required to be replaced.
The device body 1 is a cylinder with an inner through hole, the upper part is an inner thread buckle and is connected with the upper part of a drill column, the lower part is an outer thread buckle and is connected with the lower part of the drill column, the outer circle of the middle part is cylindrical, three to four straight dovetail grooves are formed at one end of the cylindrical part and are not communicated, the length of the cylindrical part corresponds to that of the corresponding straight dovetail wing 4, the straight dovetail wing 4 is inserted into the cylindrical part, the lower part is in a plate shape and is matched with the dovetail grooves in a dovetail form, two edges of the cylindrical part are chamfered to form a trapezoid shape, when the straight dovetail wing is inserted along the dovetail on the device body 1, a transverse perforation is formed at the opening end of the straight dovetail groove of the device body 1 and is used for inserting a stable pin shaft 3 to block an exit channel of the straight dovetail wing 4, and a screw hole is formed at the bottom of the straight dovetail groove and is used for installing a fixing bolt 2 to limit the exit of the stable pin shaft 3, and further fixing the straight dovetail wing 4.
The straight dovetail wing 4 is plate-shaped, the lower part of the straight dovetail wing is matched with the dovetail groove in a dovetail mode, the upper part of the straight dovetail wing is in a trapezoid shape with chamfer angles at two sides, after the straight dovetail wing 4 is inserted along the dovetail on the device body 3, the limiting pin roll 3 is inserted to prevent the straight dovetail wing from withdrawing, and then the fixing bolt 2 is installed to further fix the straight dovetail wing 4, so that the normal use of the stabilizer is ensured.
The pin stabilizing shaft 3 is cylindrical, a thin neck is arranged in the middle of the pin stabilizing shaft, and the bolt 2 passes through the pin stabilizing shaft and is abutted against the pin stabilizing shaft to limit the pin stabilizing shaft 3 to move left and right along the axis.
The invention has the use condition that the processed replaceable straight wing stabilizer is connected to a drill string according to the design requirement, and descends along with the drill string when the drilling is performed, and the replaceable straight wing stabilizer plays a role in stabilizing when the drilling is performed, so that normal drilling operation is performed, meanwhile, when the drill string is pulled out, the tool is found to be worn out and exceeds standard, the fixing bolt 2 on the field releasable device body 1 is extracted, the pin stabilizing shaft 3 is taken out, the straight dovetail wing 4 is replaced by a new straight dovetail wing 4, and the pin stabilizing shaft 3 and the fixing bolt 2 are inserted into the well again for use, so that the stabilizing effect in the drill string is well solved, the cost is reduced, the safety of the tool is improved, and the service life of the device body is prolonged.
The invention has novel and unique structure, is simple and reasonable, enhances the working capacity of the drill string stabilizer in the drilling process, enhances the safety, improves the difficult problem of site operability, reduces the occurrence of underground engineering accidents of drilling, has convenient use and good effect, is innovation on the drilling stabilizer, and has good economic and social benefits.
Claims (2)
1. The utility model provides a interchangeable straight wing stabilizer, including the ware body, steady round pin axle and straight swallow fin, a serial communication port, ware body (1) is the cylinder that has upper and lower through-hole (8) for the center, upper portion is that internal thread knot (5) links to each other with the drilling string upper portion, internal thread knot (5) are the oral area big inner little, and there is the round hole groove form of internal thread on the pore wall, lower part is that external thread knot (6) links to each other with the drilling string lower part, external thread knot (6) are the hollow toper that front end diameter is little, rear end diameter is big, the middle part excircle is outside expansion diameter to be greater than the cylinder convex body (7) of both ends cylinder, open on the perisporium of cylinder convex body (7) have three to four straight dovetail (9) of alternate equipartition, the length of the straight Yan Weiyi (4) corresponds to that of the corresponding straight dovetail wing, the two sides of the outer end face are inclined planes (4-1) and are inserted into the straight dovetail groove (9) and are tightly fixed with the device body, the lower part of the straight Yan Weiyi is in a dovetail form and is matched with the straight dovetail groove, the upper part of the straight dovetail groove is in a trapezoid shape with two chamfer angles, when the straight dovetail wing is inserted along the straight dovetail groove on the device body (1), the opening end of the straight dovetail groove of the device body is provided with a transverse perforation for inserting the stabilizing pin shaft (3), the transverse perforation is inserted with the stabilizing pin shaft (3) for blocking the exit channel of the straight dovetail wing, the bottom of the straight dovetail groove is provided with a screw hole for fixing, a fixing bolt (2) is arranged in the screw hole for limiting the exit of the stabilizing pin shaft (3), the straight Yan Weiyi (4) is further fixed, the stabilizing pin shaft (3) is cylindrical, the middle is provided with a thin neck, and the fixing bolt (2) passes through the thin neck tightly to limit the stable pin shaft to move left and right along the axis; when the stabilizer is used, the stabilizer is connected to the drill string, and descends along with the drill string when the stabilizer is drilled down, so that the stabilizer has the effect of centralizing and stabilizing, and normal drilling operation is performed; when the drill string is pulled out, the situation that the abrasion of the straight dovetail wing exceeds the standard is found, the fixing bolt (2) on the on-site detachable device body (1) is extracted, the stabilizing pin shaft (3) is taken out, the straight Yan Weiyi (4) is replaced by a new straight Yan Weiyi (4), the stabilizing pin shaft (3) and the fixing bolt (2) are inserted into the well again, the stability in the drill string is achieved, the cost is reduced, the safety is improved, and the service life is prolonged.
2. The replaceable straight wing stabilizer according to claim 1, wherein both ends of the cylindrical convex body (7) are inclined planes (1-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811602368.XA CN109403881B (en) | 2018-12-26 | 2018-12-26 | Stabilizer with replaceable straight wings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811602368.XA CN109403881B (en) | 2018-12-26 | 2018-12-26 | Stabilizer with replaceable straight wings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109403881A CN109403881A (en) | 2019-03-01 |
| CN109403881B true CN109403881B (en) | 2023-12-26 |
Family
ID=65461582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811602368.XA Active CN109403881B (en) | 2018-12-26 | 2018-12-26 | Stabilizer with replaceable straight wings |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109403881B (en) |
Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB733596A (en) * | 1953-09-14 | 1955-07-13 | John Frazer Cochran | Insert for use in a drilling string |
| CA1090325A (en) * | 1978-06-01 | 1980-11-25 | James W. Young | Replaceable sleeve drill collar stabilizer |
| CA1098111A (en) * | 1978-09-21 | 1981-03-24 | Daniel B. Justman | Wall contacting tool |
| US4378852A (en) * | 1981-04-09 | 1983-04-05 | Garrett William R | Wedge lock stabilizer |
| CN87208513U (en) * | 1987-05-29 | 1988-02-03 | 石油勘探开发科学研究院机械研究所 | Drill set aligner |
| CN2637700Y (en) * | 2003-07-17 | 2004-09-01 | 中国石油天然气集团公司 | Drilling underreaming device |
| RU2263195C2 (en) * | 2003-03-05 | 2005-10-27 | Сорокоумов Виктор Константинович | Replaceable support-and-centering member |
| CN2740763Y (en) * | 2005-06-01 | 2005-11-16 | 赵道远 | Anti-offset wear stabilizer of independent wear-resistant stripped sucker rod |
| CN2830651Y (en) * | 2005-07-18 | 2006-10-25 | 重庆力帆实业（集团）有限公司 | Starting reducer of engine |
| CN201007187Y (en) * | 2007-02-06 | 2008-01-16 | 大港油田集团有限责任公司 | Split type centralizer |
| DE602004013330D1 (en) * | 2004-10-20 | 2008-06-05 | Europ Drilling Projects B V | Bohrstrangstabilisator |
| CN201810226U (en) * | 2010-09-15 | 2011-04-27 | 中国石油天然气集团公司 | Well drilling torque-reducing stabilizer |
| CN102041971A (en) * | 2011-02-01 | 2011-05-04 | 天津立林石油机械有限公司 | Replaceable mine screw drill centralizer |
| CN201851036U (en) * | 2010-11-21 | 2011-06-01 | 中国石油集团西部钻探工程有限公司 | Antifriction and resistance-diminishing centralizing short piece |
| CN203655157U (en) * | 2014-01-04 | 2014-06-18 | 黑龙江北方双佳钻采机具有限责任公司 | Tapered stabilizer with replaceable plate |
| CN203682394U (en) * | 2014-01-07 | 2014-07-02 | 凯盛重工有限公司 | Belt conveyor tail frame |
| WO2014174325A2 (en) * | 2013-04-26 | 2014-10-30 | Neil Andrew Abercrombie Simpson | Downhole apparatus and method |
| CN105971525A (en) * | 2015-03-13 | 2016-09-28 | 欧洲钻探工程公司 | Blade stabiliser tool for drill string |
| CN107438697A (en) * | 2015-04-16 | 2017-12-05 | 哈利伯顿能源服务公司 | For providing the stabilizer with fin installing type electrode of signal to drill string antenna |
| CN209293702U (en) * | 2018-12-26 | 2019-08-23 | 济源微浪石油设备有限公司 | Interchangeable straight wing stabilizer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO322969B1 (en) * | 2005-08-01 | 2006-12-18 | Well Innovation As | Adjustable centering tool for use in rudders with different internal diameters |
| CN203347707U (en) * | 2013-07-22 | 2013-12-18 | 中国石油天然气集团公司 | Sleeve-replaceable drill tool stabilizer |
-
2018
- 2018-12-26 CN CN201811602368.XA patent/CN109403881B/en active Active
Patent Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB733596A (en) * | 1953-09-14 | 1955-07-13 | John Frazer Cochran | Insert for use in a drilling string |
| CA1090325A (en) * | 1978-06-01 | 1980-11-25 | James W. Young | Replaceable sleeve drill collar stabilizer |
| CA1098111A (en) * | 1978-09-21 | 1981-03-24 | Daniel B. Justman | Wall contacting tool |
| US4378852A (en) * | 1981-04-09 | 1983-04-05 | Garrett William R | Wedge lock stabilizer |
| CN87208513U (en) * | 1987-05-29 | 1988-02-03 | 石油勘探开发科学研究院机械研究所 | Drill set aligner |
| RU2263195C2 (en) * | 2003-03-05 | 2005-10-27 | Сорокоумов Виктор Константинович | Replaceable support-and-centering member |
| CN2637700Y (en) * | 2003-07-17 | 2004-09-01 | 中国石油天然气集团公司 | Drilling underreaming device |
| DE602004013330D1 (en) * | 2004-10-20 | 2008-06-05 | Europ Drilling Projects B V | Bohrstrangstabilisator |
| CN2740763Y (en) * | 2005-06-01 | 2005-11-16 | 赵道远 | Anti-offset wear stabilizer of independent wear-resistant stripped sucker rod |
| CN2830651Y (en) * | 2005-07-18 | 2006-10-25 | 重庆力帆实业（集团）有限公司 | Starting reducer of engine |
| CN201007187Y (en) * | 2007-02-06 | 2008-01-16 | 大港油田集团有限责任公司 | Split type centralizer |
| CN201810226U (en) * | 2010-09-15 | 2011-04-27 | 中国石油天然气集团公司 | Well drilling torque-reducing stabilizer |
| CN201851036U (en) * | 2010-11-21 | 2011-06-01 | 中国石油集团西部钻探工程有限公司 | Antifriction and resistance-diminishing centralizing short piece |
| CN102041971A (en) * | 2011-02-01 | 2011-05-04 | 天津立林石油机械有限公司 | Replaceable mine screw drill centralizer |
| WO2014174325A2 (en) * | 2013-04-26 | 2014-10-30 | Neil Andrew Abercrombie Simpson | Downhole apparatus and method |
| CN203655157U (en) * | 2014-01-04 | 2014-06-18 | 黑龙江北方双佳钻采机具有限责任公司 | Tapered stabilizer with replaceable plate |
| CN203682394U (en) * | 2014-01-07 | 2014-07-02 | 凯盛重工有限公司 | Belt conveyor tail frame |
| CN105971525A (en) * | 2015-03-13 | 2016-09-28 | 欧洲钻探工程公司 | Blade stabiliser tool for drill string |
| CN107438697A (en) * | 2015-04-16 | 2017-12-05 | 哈利伯顿能源服务公司 | For providing the stabilizer with fin installing type electrode of signal to drill string antenna |
| CN209293702U (en) * | 2018-12-26 | 2019-08-23 | 济源微浪石油设备有限公司 | Interchangeable straight wing stabilizer |
Non-Patent Citations (5)
| Title |
|---|
| 减少钻铤柱与地层及套管间磨损问题的探讨;徐祖(火西);石油钻采工艺(05);29-33 * |
| 史密斯钻具公司生产的炮孔钻进工具;刘汉杰;;矿山机械(09);35-43 * |
| 基于有限元法的套管钻井套管稳定器设计;玄令超;管志川;史玉才;;钻采工艺(04);63-66 * |
| 扩张式随钻扩眼工具技术现状与发展建议;闫永宏;王进全;黄悦华;赵旭东;王闻涛;;石油机械(10);162-165 * |
| 随钻扩眼技术研究进展;余荣华;袁鹏斌;;石油机械(08);6-10 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109403881A (en) | 2019-03-01 |
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