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公开(公告)号：US10921480B2
公开(公告)日：2021-02-16
申请号：US16362590
申请日：2019-03-22
发明人： Lizhi Xiao , Guangzhi Liao , Zhe Sun , Xin Li , Sihui Luo
IPC分类号： G01V3/32 , E21B47/024 , E21B49/00 , E21B47/002
摘要： The application provides a downhole three-dimensional scanning nuclear magnetic resonance imaging logging instrument and a probe, an antenna thereof, wherein the antenna comprises: an radio frequency antenna, an orienting device and a rotating device; the radio frequency antenna is fixed on an outer surface of the orienting device, and the orienting device is arranged on a magnet, the rotating device is fixed on the magnet; the rotating device is movably connected to the orienting device; and the rotating device is configured to drive the orienting device to rotate relative to the magnet, such that the radio frequency antenna on the orienting device can be drived to rotate, and echo signals in different directions can be acquired by the radio frequency antenna. The purpose of multi-directional measurement can be achieved, and the overall properties of an undisturbed stratum can be reflected by the applicant.
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公开(公告)号：US10151808B2
公开(公告)日：2018-12-11
申请号：US15258731
申请日：2016-09-07
发明人： Lizhi Xiao , Zhe Sun , Guangzhi Liao , Sihui Luo , Xin Li , Qunjie Du , Wei Liu , Weiliang Chen , Jie Wang
IPC分类号： H01Q1/38 , G01R33/3415 , G01N24/08
摘要： The present invention provides a multi-detecting depth nuclear magnetic resonance logging tool and probe, and an antenna excitation method, the probe of nuclear magnetic resonance logging tool includes: a housing, a magnet and an antenna array apparatus; the magnet is fixedly arranged in the housing; the antenna array apparatus includes at least two groups of antenna arrays distributed along circumference of the magnet, and each group of antenna arrays include N layers of independently fed antennas; k-th layer antenna is arranged between the magnet and (k+1)-th layer antenna, k=1, 2, . . . N−1; the antenna is fixed on a support, and the support is fixedly connected to the housing. In the present invention, stratum information detection at different azimuth angles is achieved by exciting different antenna arrays, so that circumferential recognizing capability of nuclear magnetic resonance logging tool probe is improved and three-dimensional (radial, axial and circumferential) stratum detection is achieved.
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公开(公告)号：US10191178B2
公开(公告)日：2019-01-29
申请号：US15258787
申请日：2016-09-07
发明人： Lizhi Xiao , Xin Li , Guangzhi Liao , Sihui Luo , Zhe Sun , Wei Liu , Weiliang Chen , Jie Wang , Kuntie Liao
摘要： The present invention provides a three-dimensional nuclear magnetic resonance logging instrument probe, a logging instrument and an antenna excitation method, where the probe includes: a probe framework, a magnet and an antenna; four magnets are uniformly distributed along a circumference of the probe framework, the magnets are magnetized in a radial direction of the probe framework, two magnets placed opposite to each other are magnetized from outside to inside, and the other two magnets placed opposite to each other are magnetized from inside to outside; in the probe framework, each of the magnets is provided with independently fed antennas; antennas corresponding to each of the magnets comprise a left antenna provided on one side of the corresponding magnet and a right antenna provided on the other side of the corresponding magnet; the left antenna and the right antenna corresponding to each magnet are electrically connected.
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4.发明授权公开(公告)号：US10151852B2
公开(公告)日：2018-12-11
申请号：US15258843
申请日：2016-09-07
发明人： Lizhi Xiao , Guangzhi Liao , Xin Li , Feng Deng , Sihui Luo , Zhe Sun , Wei Liu , Weiliang Chen , Jie Wang
IPC分类号： G01V3/32 , G01V3/14 , E21B47/024 , G01R33/34 , G01N24/08 , G01R33/3415 , G01R33/38 , G01R33/383
摘要： The present invention provides a multi-azimuth nuclear magnetic resonance logging instrument and an antenna excitation method, the nuclear magnetic resonance logging instrument includes: a probe framework and a shielding layer arranged in the probe framework; a plurality of main magnets are provided above and below the shielding layer, respectively; central axes of the main magnets are parallel with each other, and distances between the central axes of each of the main magnets and a central axis of the probe framework are the same; a distance between central axes of any two main magnets is not smaller than a first preset value; and an antenna is provided at outer side of each main magnet, and a plurality of the antennas are fed independently. In the present invention, circumferential recognizing capability of the nuclear magnetic resonance logging instrument can be improved and three-dimensional (radial, axial and circumferential) stratum detection can be achieved.
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