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公开(公告)号：US10708869B2
公开(公告)日：2020-07-07
申请号：US15419544
申请日：2017-01-30
Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
Inventor： Arnaud Croux , Julius Kusuma , Stephane Vannuffelen
Abstract: An acoustic network is located in a formation traversed by a borehole having a pipe contained therein. The acoustic network includes a backbone network having a number of backbone modems engaging the pipe and acoustically communicating along the pipe using a first modulation technique. A number of end node modems acoustically communicate using a second modulation technique orthogonal to the first modulation technique. At least one of the backbone modems is a bridge hub modem that is coupled to both the backbone network and an end node modem and communicates with the backbone network using the first modulation technique and with the end node modem using the second modulation technique. The end node modems may have a hibernation mode defined by low energy usage with no transmission or receipt of data, and a transmission mode defined by transmission of data by the end node modem.
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公开(公告)号：US10317564B2
公开(公告)日：2019-06-11
申请号：US15479318
申请日：2017-04-05
Applicant: Schlumberger Technology Corporation
Inventor： Timothy Andrew John Hopper , David G Cory , Julius Kusuma , Yi-Qiao Song , Martin D. Hurlimann , Martin E. Poitzsch
Abstract: Methods and systems are provided for tools having non-resonant circuits for analyzing a formation and/or a sample. For example, nuclear magnetic resonance and resistivity tools can make use of a non-resonant excitation coil and/or a detection coil. These coils can achieve desired frequencies by the use of switches, thereby removing the requirement of tuning circuits that are typical in conventional tools.
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公开(公告)号：US10274639B2
公开(公告)日：2019-04-30
申请号：US15620703
申请日：2017-06-12
Applicant: Schlumberger Technology Corporation
Inventor： Andriy Gelman , Julius Kusuma , Luis Eduardo DePavia , Arnaud Croux
Abstract: A method for improving a quality of data received from a downhole tool in a wellbore includes receiving a first block of data from a downhole tool in a wellbore. The first block of data represents a first measurement captured by the downhole tool during a first period of time. At least a portion of a bit budget for a second block of data is allocated to the first block of data to produce an updated first block of data. The method also includes receiving the second block of data from the downhole tool in the wellbore. The second block of data represents a second measurement captured by the downhole tool during a second period of time.
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公开(公告)号：US10236906B2
公开(公告)日：2019-03-19
申请号：US14060590
申请日：2013-10-22
Applicant: Schlumberger Technology Corporation
Inventor： Clement Probel , Carlos Merino , Julius Kusuma , Andriy Gelman
Abstract: A modem is described having a transceiver assembly, a non-transitory processor readable medium coupled to the transceiver assembly, transceiver electronics coupled to the transceiver and the non-transitory processor readable medium, and a power supply supplying power to the transceiver assembly and the transceiver electronics. The transceiver electronics are configured to calculate a size of an output bit stream based on an encoding scheme to encode for transmission data stored in the non-transitory processor readable medium, decimate the data if the size of the output bit stream exceeds a predetermined size, recalculate the size of the output bit stream, after decimation of the data, based on the encoding scheme to encode for transmission the decimated data, and encode the data using the encoding scheme.
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公开(公告)号：US20180220380A1
公开(公告)日：2018-08-02
申请号：US15419544
申请日：2017-01-30
Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
Inventor： Arnaud Croux , Julius Kusuma , Stephane Vannuffelen
CPC classification number: H04W52/244 , H04B2215/061 , H04L5/0055 , H04L5/1469 , H04L27/00 , H04W40/005 , H04W56/002 , Y02D70/00
Abstract: An acoustic network is located in a formation traversed by a borehole having a pipe contained therein. The acoustic network includes a backbone network having a number of backbone modems engaging the pipe and acoustically communicating along the pipe using a first modulation technique. A number of end node modems acoustically communicate using a second modulation technique orthogonal to the first modulation technique. At least one of the backbone modems is a bridge hub modem that is coupled to both the backbone network and an end node modem and communicates with the backbone network using the first modulation technique and with the end node modem using the second modulation technique. The end node modems may have a hibernation mode defined by low energy usage with no transmission or receipt of data, and a transmission mode defined by transmission of data by the end node modem.
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Patent Agency Ranking
公开(公告)号：US09923575B2
公开(公告)日：2018-03-20
申请号：US13766780
申请日：2013-02-14
Applicant: Schlumberger Technology Corporation
Inventor： Jeehong Yang , Julius Kusuma
CPC classification number: H03M7/40 , E21B47/12 , G01V1/22 , G01V1/46 , G01V1/48 , G01V11/002 , H03M7/30
Abstract: Compression of multidimensional sonic data is disclosed. Example methods disclosed herein to compress input multidimensional sonic data include decorrelating the input multidimensional sonic data to determine decorrelated multidimensional sonic data. In some such examples, the input multidimensional sonic data has a plurality of dimensions corresponding to a respective plurality of azimuthal directions from which the input multidimensional sonic data was obtained. In such examples, the decorrelated multidimensional sonic data is decorrelated among the plurality of dimensions of the input multidimensional sonic data. Such example methods also include processing the decorrelated multidimensional sonic data to determine compressed data representative of the input multidimensional sonic data.
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公开(公告)号：US20180003527A1
公开(公告)日：2018-01-04
申请号：US15620713
申请日：2017-06-12
Applicant: Schlumberger Technology Corporation
Inventor： Arnaud Jarrot , Julius Kusuma
CPC classification number: G01D5/24476 , E21B47/00 , E21B47/122 , E21B49/00 , G01D3/036 , G01D5/14
Abstract: Sensor array noise reduction is provided. Techniques involve systems and methods for reducing sensor array noise by estimating an instantaneous frequency of a coherent noise signal in a logging system. The instantaneous frequency may be estimated based on a rotation of an electric motor in the logging system, or may estimated by applying suitable signal processing algorithms on measurements in the logging system. A virtual measurement may be computer using the instantaneous frequency. The virtual measurement may be demodulated to obtain a baseband signal, and noise may be removed from the baseband signal to obtain a denoised signal.
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公开(公告)号：US20180003043A1
公开(公告)日：2018-01-04
申请号：US15620703
申请日：2017-06-12
Applicant: Schlumberger Technology Corporation
Inventor： Andriy Gelman , Julius Kusuma , Luis Eduardo DePavia , Arnaud Croux
CPC classification number: G01V11/002 , E21B47/121
Abstract: A method for improving a quality of data received from a downhole tool in a wellbore includes receiving a first block of data from a downhole tool in a wellbore. The first block of data represents a first measurement captured by the downhole tool during a first period of time. At least a portion of a bit budget for a second block of data is allocated to the first block of data to produce an updated first block of data. The method also includes receiving the second block of data from the downhole tool in the wellbore. The second block of data represents a second measurement captured by the downhole tool during a second period of time.
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公开(公告)号：US20170205528A1
公开(公告)日：2017-07-20
申请号：US15479318
申请日：2017-04-05
Applicant: Schlumberger Technology Corporation
Inventor： Timothy Andrew John Hopper , David G Cory , Julius Kusuma , Yi-Qiao Song , Martin D. Hurlimann , Martin E. Poitzsch
CPC classification number: G01V3/32 , G01N24/081 , G01R33/3607 , G01R33/3621
Abstract: Methods and systems are provided for tools having non-resonant circuits for analyzing a formation and/or a sample. For example, nuclear magnetic resonance and resistivity tools can make use of a non-resonant excitation coil and/or a detection coil. These coils can achieve desired frequencies by the use of switches, thereby removing the requirement of tuning circuits that are typical in conventional tools.
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公开(公告)号：US20130251083A1
公开(公告)日：2013-09-26
申请号：US13889944
申请日：2013-05-08
Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
Inventor： Michael Montgomery , Julius Kusuma , Jean Seydoux , Desheng Zhang
IPC: H04L7/00
CPC classification number: G01V11/002 , G01V13/00 , G01V2200/12 , G06F1/12 , H04J3/0638 , H04L7/0054 , H04L7/04 , H04L7/08 , H04L2007/047
Abstract: The present disclosure relates to a method to determine a clock signal when separate clocks are used. In one embodiment, a disciplined clock system comprising an update subsystem and a synthesis subsystem is provided. A first clock phase estimate is provided to the update subsystem and used, along with the update subsystem, to determine a frequency offset estimate and a phase offset estimate. The clock signal is determining using the frequency offset estimate, the phase offset estimate, and the synthesis subsystem. Alternatively, two clocks can be synchronized by generating a signal associated with a first clock; modulating the signal; transmitting the modulated signal; receiving the modulated signal by a receiver associated with a second clock; correlating the received signal; determining the time of arrival of the received signal; determining the time difference between the two clocks; and synchronizing the two clocks.
Abstract translation: 本公开涉及当使用单独的时钟时确定时钟信号的方法。 在一个实施例中，提供了包括更新子系统和综合子系统的纪律时钟系统。 向更新子系统提供第一时钟相位估计，并与更新子系统一起使用以确定频率偏移估计和相位偏移估计。 时钟信号是使用频率偏移估计，相位偏移估计和合成子系统来确定的。 或者，可以通过产生与第一时钟相关联的信号来同步两个时钟; 调制信号; 发送调制信号; 通过与第二时钟相关联的接收机接收调制信号; 对接收的信号进行相关; 确定接收到的信号的到达时间; 确定两个时钟之间的时差; 并同步两个时钟。
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