A Lift-Off-Tolerant Magnetic Flux Leakage Testing Method for Drill Pipes at Wellhead
To meet the great needs for MFL (magnetic flux leakage) inspection of drill pipes at wellheads, a lift-off-tolerant MFL testing method is proposed and investigated in this paper. Firstly, a Helmholtz coil magnetization method and the whole MFL testing scheme are proposed. Then, based on the magnetic...
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| Format: | Article |
| Language: | English |
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MDPI AG
2017-01-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/17/1/201 |
| _version_ | 1811302483831554048 |
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| author | Jianbo Wu Hui Fang Long Li Jie Wang Xiaoming Huang Yihua Kang Yanhua Sun Chaoqing Tang |
| author_facet | Jianbo Wu Hui Fang Long Li Jie Wang Xiaoming Huang Yihua Kang Yanhua Sun Chaoqing Tang |
| author_sort | Jianbo Wu |
| collection | DOAJ |
| description | To meet the great needs for MFL (magnetic flux leakage) inspection of drill pipes at wellheads, a lift-off-tolerant MFL testing method is proposed and investigated in this paper. Firstly, a Helmholtz coil magnetization method and the whole MFL testing scheme are proposed. Then, based on the magnetic field focusing effect of ferrite cores, a lift-off-tolerant MFL sensor is developed and tested. It shows high sensitivity at a lift-off distance of 5.0 mm. Further, the follow-up high repeatability MFL probing system is designed and manufactured, which was embedded with the developed sensors. It can track the swing movement of drill pipes and allow the pipe ends to pass smoothly. Finally, the developed system is employed in a drilling field for drill pipe inspection. Test results show that the proposed method can fulfill the requirements for drill pipe inspection at wellheads, which is of great importance in drill pipe safety. |
| first_indexed | 2024-04-13T07:28:53Z |
| format | Article |
| id | doaj.art-20d9a780330d4b4d99be76fe19dba788 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-13T07:28:53Z |
| publishDate | 2017-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-20d9a780330d4b4d99be76fe19dba7882022-12-22T02:56:24ZengMDPI AGSensors1424-82202017-01-0117120110.3390/s17010201s17010201A Lift-Off-Tolerant Magnetic Flux Leakage Testing Method for Drill Pipes at WellheadJianbo Wu0Hui Fang1Long Li2Jie Wang3Xiaoming Huang4Yihua Kang5Yanhua Sun6Chaoqing Tang7School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, ChinaSchool of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, ChinaSchool of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaSchool of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, ChinaSchool of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, ChinaSchool of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaSchool of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaSchool of Electrical and Electronic Engineering, Newcastle University, Newcastle upon Tyne NE1 7RU, UKTo meet the great needs for MFL (magnetic flux leakage) inspection of drill pipes at wellheads, a lift-off-tolerant MFL testing method is proposed and investigated in this paper. Firstly, a Helmholtz coil magnetization method and the whole MFL testing scheme are proposed. Then, based on the magnetic field focusing effect of ferrite cores, a lift-off-tolerant MFL sensor is developed and tested. It shows high sensitivity at a lift-off distance of 5.0 mm. Further, the follow-up high repeatability MFL probing system is designed and manufactured, which was embedded with the developed sensors. It can track the swing movement of drill pipes and allow the pipe ends to pass smoothly. Finally, the developed system is employed in a drilling field for drill pipe inspection. Test results show that the proposed method can fulfill the requirements for drill pipe inspection at wellheads, which is of great importance in drill pipe safety.http://www.mdpi.com/1424-8220/17/1/201MFL (magnetic flux leakage)drill pipelift-off distancemagnetic field focusing |
| spellingShingle | Jianbo Wu Hui Fang Long Li Jie Wang Xiaoming Huang Yihua Kang Yanhua Sun Chaoqing Tang A Lift-Off-Tolerant Magnetic Flux Leakage Testing Method for Drill Pipes at Wellhead Sensors MFL (magnetic flux leakage) drill pipe lift-off distance magnetic field focusing |
| title | A Lift-Off-Tolerant Magnetic Flux Leakage Testing Method for Drill Pipes at Wellhead |
| title_full | A Lift-Off-Tolerant Magnetic Flux Leakage Testing Method for Drill Pipes at Wellhead |
| title_fullStr | A Lift-Off-Tolerant Magnetic Flux Leakage Testing Method for Drill Pipes at Wellhead |
| title_full_unstemmed | A Lift-Off-Tolerant Magnetic Flux Leakage Testing Method for Drill Pipes at Wellhead |
| title_short | A Lift-Off-Tolerant Magnetic Flux Leakage Testing Method for Drill Pipes at Wellhead |
| title_sort | lift off tolerant magnetic flux leakage testing method for drill pipes at wellhead |
| topic | MFL (magnetic flux leakage) drill pipe lift-off distance magnetic field focusing |
| url | http://www.mdpi.com/1424-8220/17/1/201 |
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