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公开(公告)号：US12084966B2
公开(公告)日：2024-09-10
申请号：US17808651
申请日：2022-06-24
Applicant: Schlumberger Technology Corporation
Inventor： Liang Sun , Pavel Annenkov , Arnaud Jarrot , David Kirk Conn , Robert Tennent , Richard Hunter
IPC: E21B47/18 , H04B11/00 , H04B17/336
CPC classification number: E21B47/18 , H04B11/00 , H04B17/336
Abstract: A method includes receiving a signal having a telemetry portion and a noise portion. The method may also include identifying one or more harmonic frequencies in the signal. The method may also include determining whether the one or more harmonic frequencies are in a predetermined frequency band. The method may also include determining whether a signal-to-noise ratio (SNR) of the signal is below a predetermined SNR threshold. The method may also include generating one or more notifications in response to the determination whether the one or more harmonic frequencies are in the predetermined frequency band and the determination whether the SNR is below the predetermined SNR threshold.
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公开(公告)号：US20210180448A1
公开(公告)日：2021-06-17
申请号：US17247445
申请日：2020-12-11
Applicant: Schlumberger Technology Corporation
Inventor： Pavel Annenkov , Melisa Lourdes Ramirez Tovar , Robert Tennent , Sam Soundar , Jiuping Chen , Liang Sun , Richard Hunter , Wei Zhou
Abstract: Communication between the surface and a downhole location, such as a bottomhole assembly and/or an RSS is performed by electromagnetic downlink. Electromagnetic signals are transmitted from the surface through the formation at a frequency of 8 Hz or greater. Electromagnetic signals are transmitted and received while drilling or during drilling activities. In this manner, information and instructions may be transmitted to the BHA while drilling.
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Patent Agency Ranking
公开(公告)号：US20210095525A1
公开(公告)日：2021-04-01
申请号：US17060498
申请日：2020-10-01
Applicant: Schlumberger Technology Corporation
Inventor： Luis Eduardo DePavia , Jiuping Chen , Liang Sun , Richard Hunter
IPC: E21B7/06 , E21B49/08 , E21B47/0228
Abstract: A method for steering a downhole tool includes receiving an electromagnetic (EM) signal from the downhole tool. The downhole tool is in a wellbore in a formation. The EM signal comprises a gap voltage and a gap current that are measured across a gap sub in the downhole tool. The method also includes determining a gap impedance based at least partially upon the gap voltage and the gap current. The method also includes determining a first formation resistivity at a first location in the wellbore based at least partially upon the gap impedance. The method also includes steering the downhole tool based at least partially upon the first formation resistivity.
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公开(公告)号：US11719048B2
公开(公告)日：2023-08-08
申请号：US17060498
申请日：2020-10-01
Applicant: Schlumberger Technology Corporation
Inventor： Luis Eduardo DePavia , Jiuping Chen , Liang Sun , Richard Hunter
CPC classification number: E21B7/04 , E21B7/068 , E21B7/10 , E21B47/0228 , E21B47/13 , E21B49/087
Abstract: A method for steering a downhole tool includes receiving an electromagnetic (EM) signal from the downhole tool. The downhole tool is in a wellbore in a formation. The EM signal comprises a gap voltage and a gap current that are measured across a gap sub in the downhole tool. The method also includes determining a gap impedance based at least partially upon the gap voltage and the gap current. The method also includes determining a first formation resistivity at a first location in the wellbore based at least partially upon the gap impedance. The method also includes steering the downhole tool based at least partially upon the first formation resistivity.
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公开(公告)号：US20180335542A1
公开(公告)日：2018-11-22
申请号：US15775594
申请日：2016-11-03
Applicant: Schlumberger Technology Corporation
Inventor： Gaelle Jannin , Jiuping Chen , Andrew G. Brooks , David Kirk Conn , Luis Eduardo DePavia , Liang Sun , Michael W. Schwartz , Richard Hunter
Abstract: A method for placement of electrodes includes determining spatial distribution of a signal caused by generating an electromagnetic field in an instrument disposed in drill string used to drill a wellbore. The electromagnetic field comprises encoded measurements from tromagnetic at least one sensor associated with the instrument. Voltages induced by noise are measured across at least one pair of spaced apart electrodes placed at a plurality of positions spaced apart from a surface location of the wellbore. A spatial distribution of noise is estimated using the measured voltages. Positions for placement of at least two electrodes are selected using the spatial distribution of signal and the spatial distribution of noise.
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公开(公告)号：US12110789B2
公开(公告)日：2024-10-08
申请号：US17247445
申请日：2020-12-11
Applicant: Schlumberger Technology Corporation
Inventor： Pavel Annenkov , Melisa Lourdes Ramirez Tovar , Robert Tennent , Sam Soundar , Jiuping Chen , Liang Sun , Richard Hunter , Wei Zhou
Abstract: Communication between the surface and a downhole location, such as a bottomhole assembly and/or an RSS is performed by electromagnetic downlink. Electromagnetic signals are transmitted from the surface through the formation at a frequency of 8 Hz or greater. Electromagnetic signals are transmitted and received while drilling or during drilling activities. In this manner, information and instructions may be transmitted to the BHA while drilling.
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公开(公告)号：US20220412212A1
公开(公告)日：2022-12-29
申请号：US17808651
申请日：2022-06-24
Applicant: Schlumberger Technology Corporation
Inventor： Liang Sun , Pavel Annenkov , Arnaud Jarrot , David Kirk Conn , Robert Tennent , Richard Hunter
IPC: E21B47/18 , H04B11/00 , H04B17/336
Abstract: A method includes receiving a signal having a telemetry portion and a noise portion. The method may also include identifying one or more harmonic frequencies in the signal. The method may also include determining whether the one or more harmonic frequencies are in a predetermined frequency band. The method may also include determining whether a signal-to-noise ratio (SNR) of the signal is below a predetermined SNR threshold. The method may also include generating one or more notifications in response to the determination whether the one or more harmonic frequencies are in the predetermined frequency band and the determination whether the SNR is below the predetermined SNR threshold.
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