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公开(公告)号：US12234721B2
公开(公告)日：2025-02-25
申请号：US17660637
申请日：2022-04-26
Applicant: Schlumberger Technology Corporation
Inventor： Liang Sun , Pavel Annenkov , Robert Tennent , Andriy Gelman
IPC: E21B47/13 , H04B17/10 , H04B17/318 , H04B17/382
Abstract: A method for configuring telemetry transmission includes receiving a transmitted telemetry signal at the earth's surface. The received signal is selected and processed to compute a measured power spectral density (PSD). A theoretical PSD is computed of the transmitted signal at the known carrier frequency and processed in combination with the measured PSD to compute an attenuation factor of the transmitted signal at a plurality of frequencies.
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2.发明申请公开(公告)号：US20180003044A1
公开(公告)日：2018-01-04
申请号：US15623424
申请日：2017-06-15
Applicant: Schlumberger Technology Corporation
Inventor： Julius Kusuma , Arnaud Jarrot , Adeel Mukhtar , Liang Sun , Robert W. Tennent , David Kirk Conn , Luis Eduardo DePavia
CPC classification number: E21B47/122 , E21B47/121 , E21B47/18
Abstract: A method for configuring transmission signals is disclosed. The method includes receiving a signal from a downhole tool in a wellbore. The signal may include a telemetry portion and a noise portion. The method also includes reproducing the telemetry portion based at least partially on the signal. Further, the method includes subtracting the telemetry portion from the signal. The method includes estimating, based at least partially on the subtraction, the noise portion of the signal. The method also includes altering a transmission configuration of the downhole tool based at least partially on the noise portion of the signal.
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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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公开(公告)号：US20220341316A1
公开(公告)日：2022-10-27
申请号：US17660637
申请日：2022-04-26
Applicant: Schlumberger Technology Corporation
Inventor： Liang Sun , Pavel Annenkov , Robert Tennent , Andriy Gelman
IPC: E21B47/13 , H04B17/10 , H04B17/318 , H04B17/382
Abstract: A method for configuring telemetry transmission includes receiving a transmitted telemetry signal at the earth's surface. The received signal is selected and processed to compute a measured power spectral density (PSD). A theoretical PSD is computed of the transmitted signal at the known carrier frequency and processed in combination with the measured PSD to compute an attenuation factor of the transmitted signal at a plurality of frequencies.
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Patent Agency Ranking
公开(公告)号：US20190226328A1
公开(公告)日：2019-07-25
申请号：US16251120
申请日：2019-01-18
Applicant: Schlumberger Technology Corporation
Inventor： Jiuping Chen , Gaelle Jannin , Liang Sun
Abstract: A method for modeling an electromagnetic (EM) telemetry signal includes straightening a well in a model and dividing the well into a plurality of segments. The method also includes determining an electrical current in one or more of the segments when the well is straightened. The method also includes replacing the well with equivalent electrical sources based at least partially upon the electrical current in one or more of the segments. The method also includes bending the well back into its original shape in the model and determining the electrical current in one or more of the segments by projection when the well is back in its original shape. The method also includes summing EM fields for each of the one or more segments to estimate the EM telemetry signal.
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公开(公告)号：US20180003042A1
公开(公告)日：2018-01-04
申请号：US15620009
申请日：2017-06-12
Applicant: Schlumberger Technology Corporation
Inventor： Luis Eduardo DePavia , Dean Homan , Robert Tennent , Gaelle Jannin , Liang Sun , Jiuping Chen
CPC classification number: E21B47/122 , E21B17/028 , E21B47/011 , E21B47/02216 , E21B47/121 , G01V3/30 , G01V11/002 , H01Q1/04
Abstract: A method for recovering data from a downhole tool in a wellbore includes measuring an electromagnetic signal using first and second sensors. At least a portion of the electromagnetic signal is transmitted by a downhole tool positioned in a first wellbore. The first and second sensors are each positioned at a different location along a length of a second wellbore. The electromagnetic signal measured by the first and second sensors is decoded to recover a property measured by the downhole tool.
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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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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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