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公开(公告)号：US20200088026A1
公开(公告)日：2020-03-19
申请号：US16487032
申请日：2018-02-26
发明人： Barry Daniel Buternowsky , Kurtis Kenneth Lee West , Jili Liu , Aaron William Logan , Mahdi Yousefi Koopaei , Vincent Raymond Martin , Ali Ahmed Ali Massoud , David Arthur Sidney Switzer , Mingdong Xu , Mojtaba Kazemi Miraki
摘要： A wireless communications system for a downhole drilling operation comprises a drill string, surface communications equipment, and a downhole telemetry tool. The surface communications equipment comprises a surface EM communications module with an EM downlink transmitter configured to transmit through at least a portion of the drill string an EM downlink transmission at a frequency between 0.5 Hz and 180 kHz. The downhole telemetry tool is mountable to a drill string and has a downhole electromagnetic (EM) communications unit with an EM downlink receiver configured to receive the EM downlink transmission. The downhole EM communications unit can further comprise an EM uplink transmitter configured to transmit an EM uplink transmission at a frequency GO between 0.5 Hz and 180 kHz, in which case the surface EM communications module further comprises an EM uplink receiver configured to receive the EM uplink transmission.
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公开(公告)号：US10078154B2
公开(公告)日：2018-09-18
申请号：US15320290
申请日：2015-06-10
发明人： Aaron William Logan , Patrick R. Derkacz , Justin C. Logan , Barry Daniel Buternowsky , Mojtaba Kazemi Miraki
摘要： A downhole system comprises a main sensor, such as a gamma sensor, and a backup sensor. The backup sensor may be of a different type from the main sensor. In some embodiments the backup sensor is a high reliability sensor that may have a different sensitivity from the main sensor. The system operates both the main and backup sensors and generates calibration data for the backup sensor. If the main sensor fails the calibration data may be applied to process data from the backup sensor to yield an estimate of the data that the main sensor would have yielded if it had remained operational. The calibration data may compensate for temperature variations and/or temporal drift, for example.
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公开(公告)号：US09945227B2
公开(公告)日：2018-04-17
申请号：US15321666
申请日：2015-05-08
发明人： Justin C. Logan , Mojtaba Kazemi Miraki , Aaron W. Logan , Daniel W. Ahmoye , Patrick R. Derkacz , Barry Daniel Buternowsky
CPC分类号： E21B47/122 , E21B4/02 , E21B47/02 , E21B47/121 , E21B47/18 , H04L67/12 , H04Q9/00 , H04Q2209/40
摘要： A telemetry method transmits data by MP telemetry to a telemetry relay system which retransmits the data by EM telemetry. The method avoids the need to incorporate MP telemetry pressure transducers into rig equipment and permits telemetry from regions unfavorable for EM telemetry because of depth and/or characteristics surrounding formations.
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公开(公告)号：US10422921B2
公开(公告)日：2019-09-24
申请号：US16113735
申请日：2018-08-27
发明人： Aaron W. Logan , Patrick R. Derkacz , Justin C. Logan , Barry Daniel Buternowsky , Mojtaba Kazemi Miraki
摘要： A downhole system comprises a main sensor, such as a gamma sensor, and a backup sensor. The backup sensor may be of a different type from the main sensor. In some embodiments the backup sensor is a high reliability sensor that may have a different sensitivity from the main sensor. The system operates both the main and backup sensors and generates calibration data for the backup sensor. If the main sensor fails the calibration data may be applied to process data from the backup sensor to yield an estimate of the data that the main sensor would have yielded if it had remained operational. The calibration data may compensate for temperature variations and/or temporal drift, for example.
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公开(公告)号：US10280741B2
公开(公告)日：2019-05-07
申请号：US16163168
申请日：2018-10-17
发明人： Patrick R. Derkacz , Aaron William Logan , Justin C. Logan , Jili Liu , David A. Switzer , Robert Harris , Barry Daniel Buternowsky , Kurtis West
摘要： Data is communicated from sensors at a downhole location near a drill bit to surface equipment. Communication to the surface equipment may be direct or may pass through a series of nodes. The nodes in some cases are intelligently reconfigured to achieve desired data rates, achieve power management goals, and/or compensate for failed nodes.
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公开(公告)号：US10392928B2
公开(公告)日：2019-08-27
申请号：US15564578
申请日：2016-04-20
摘要： Method and apparatus for transmitting data to or from a downhole tool while the tool is at or near the surface using a wireless data link. A downhole tool comprising a gap sub having a tubular section with first and second longitudinally spaced-apart electrically-conducting parts that are electrically isolated from each other. An electromagnetic telemetry transmitter is connected to apply a potential difference between the first and second electrically conductive parts. A single-wire bus provides a data connection between one of the first and second electrically conductive parts and a data processor.
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公开(公告)号：US10119393B2
公开(公告)日：2018-11-06
申请号：US15321675
申请日：2015-05-08
发明人： Patrick R. Derkacz , Aaron William Logan , Justin C. Logan , Jili Liu , David A. Switzer , Robert Harris , Barry Daniel Buternowsky , Kurtis West
摘要： Data is communicated from sensors at a downhole location near a drill bit to surface equipment. Communication to the surface equipment may be direct or may pass through a series of nodes. The nodes in some cases are intelligently reconfigured to achieve desired data rates, achieve power management goals, and/or compensate for failed nodes.
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