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1. 发明授权

US10401164B2 Sensor network design and inverse modeling for reactor condition monitoring 有权
公开(公告)号：US10401164B2
公开(公告)日：2019-09-03
申请号：US14037953
申请日：2013-09-26
申请人： Limin Song , Krishnan Kumaran , Bhaskar Sengupta , Jingbo Wang
发明人： Limin Song , Krishnan Kumaran , Bhaskar Sengupta , Jingbo Wang
IPC分类号： G01B21/20 , G05B23/02
摘要： Methods and systems for detecting a condition within a component of a process plant, including obtaining a first and second set of parameter measurements from a first and second plurality of sensor locations along a first dimension of an outside surface of a component, processing the first and second set of parameter measurements to develop a continuous surface condition profile of the component using a predetermined model. The predetermined model includes a forward solution to an equation describing the condition and is linearly separable in at least two dimensions corresponding to the first and second dimension. The model includes an inverse solution to the equation to provide a set of coefficients corresponding to a set of basis functions of the forward solution based on the first and second set of parameter measurements.

2. 发明授权

US09598947B2 Automatic drilling advisory system based on correlation model and windowed principal component analysis 有权
公开(公告)号：US09598947B2
公开(公告)日：2017-03-21
申请号：US13386610
申请日：2010-06-28
申请人： Jingbo Wang , Krishnan Kumaran , Peng Xu , Steven F. Sowers , Lei Wang , Jeffrey R. Bailey , Erika A. O. Biediger , Vishwas Gupta , Narasimha-Rao V. Bangaru , Swarupa S. Bangaru
发明人： Jingbo Wang , Krishnan Kumaran , Peng Xu , Steven F. Sowers , Lei Wang , Jeffrey R. Bailey , Erika A. O. Biediger , Vishwas Gupta , Narasimha-Rao V. Bangaru
IPC分类号： G06F17/50 , E21B44/00
CPC分类号： E21B44/00
摘要： Methods and systems for controlling drilling operations include using a statistical model to identify at least two controllable drilling parameters having significant correlation to one or more drilling performance measurements. The methods and systems further generate operational recommendations for at least two controllable drilling parameters based at least in part on the statistical model. The operational recommendations are selected to optimize one or more drilling performance measurements.

3. 发明授权

US09328578B2 Method for automatic control and positioning of autonomous downhole tools 有权
标题翻译：自动井下工具自动控制和定位方法
公开(公告)号：US09328578B2
公开(公告)日：2016-05-03
申请号：US13989726
申请日：2011-11-17
申请人： Krishnan Kumaran , Niranjan A. Subrahmanya , Pavlin B. Entchev , Randy C. Tolman , Renzo Moises Angeles Boza
发明人： Krishnan Kumaran , Niranjan A. Subrahmanya , Pavlin B. Entchev , Randy C. Tolman , Renzo Moises Angeles Boza
IPC分类号： E21B23/00 , E21B41/00 , E21B43/116 , E21B47/09
CPC分类号： E21B23/00 , E21B41/00 , E21B43/116 , E21B47/0905
摘要： Methods and apparatus for actuating a downhole tool in wellbore includes acquiring a CCL data set or log from the wellbore that correlates recorded magnetic signals with measured depth, and selects a location within the wellbore for actuation of a wellbore device. The CCL log is then downloaded into an autonomous tool. The tool is programmed to sense collars as a function of time, thereby providing a second CCL log. The autonomous tool also matches sensed collars with physical signature from the first CCL log and then self-actuates the wellbore device at the selected location based upon a correlation of the first and second CCL logs.
摘要翻译：用于在井筒中致动井下工具的方法和装置包括从井眼获取CCL数据集或记录，其将记录的磁信号与测量的深度相关联，并且选择井筒内的位置以致动井筒装置。然后将CCL日志下载到自主工具中。该工具被编程为感测作为时间的函数的项圈，从而提供第二个CCL日志。自主工具还将感测到的套环与来自第一CCL日志的物理签名相匹配，然后基于第一和第二CCL日志的相关性自动致动所选位置处的井眼设备。

4. 发明申请

US20140172370A1 FLAME INSTABILITY DETECTION AND IDENTIFICATION OF UNSTABLE BURNERS IN INDUSTRIAL FURNACES 审中-公开
标题翻译：火焰不稳定性检测和识别工业炉中不稳定的燃烧器
公开(公告)号：US20140172370A1
公开(公告)日：2014-06-19
申请号：US14101626
申请日：2013-12-10
申请人： Weichang Li , Gary T. Dobbs , Limin Song , Peng Xu , Krishnan Kumaran , Mark M. Disko , Jeffrey M. Grenda , San Chhotray , Amy B. Herhold , Duane R. McGregor
发明人： Weichang Li , Gary T. Dobbs , Limin Song , Peng Xu , Krishnan Kumaran , Mark M. Disko , Jeffrey M. Grenda , San Chhotray , Amy B. Herhold , Duane R. McGregor
IPC分类号： F23N5/24
CPC分类号： F23N5/242 , G05B23/024
摘要： Systems and method for identifying an unstable subset of burners from among a plurality of burners in a furnace are also disclosed. At least one measurement is obtained from each of the plurality of burners. An instability associated with the furnace is detected. An unstable signal matrix associated with the instability is computed based on the at least one measurement from each of the plurality of burners. An unstable subset of burners is identified based at least in part on the unstable signal matrix.
摘要翻译：还公开了用于从炉中的多个燃烧器中识别燃烧器的不稳定子集的系统和方法。从多个燃烧器中的每一个获得至少一个测量值。检测到与炉相关的不稳定性。基于来自多个燃烧器中的每一个的至少一个测量来计算与不稳定性相关联的不稳定信号矩阵。至少部分地基于不稳定的信号矩阵来识别燃烧器的不稳定子集。

5. 发明申请

US20100254219A1 Detection of Features in Seismic Images 有权
标题翻译：地震图像特征检测
公开(公告)号：US20100254219A1
公开(公告)日：2010-10-07
申请号：US12741133
申请日：2008-10-31
申请人： Krishnan Kumaran , Jingbo Wang
发明人： Krishnan Kumaran , Jingbo Wang
IPC分类号： G01V1/36 , G01V1/28
CPC分类号： G01V1/288
摘要： A computer implemented method for the detection of features such as faults or channels in seismic images. First, edges are detected in a smoothed seismic image (106). To detect a fault line, an image intensity of the edges is projected in multiple spatial directions, for example by performing a Radon transform (118). The directions of maximum intensity are used to define a fault line (124c). To detect channels, smooth curves are identified within the detected edges (810). Sets of parallel smooth curves (812a) are then identified and used to define channels (812).
摘要翻译：一种用于检测地震图像中的故障或通道等特征的计算机实现方法。首先，在平滑的地震图像中检测边缘（106）。为了检测故障线，例如通过执行Radon变换（118），沿多个空间方向投影边缘的图像强度。最大强度的方向用于定义断层线（124c）。为了检测通道，在检测到的边缘内识别平滑曲线（810）。然后识别并行平滑曲线组（812a）并用于定义通道（812）。

6. 发明授权

US06405046B1 Method for partitioning mobile stations of a wireless network between an overlay and an underlay 有权
标题翻译：用于分割覆盖层和底层之间的无线网络的移动站的方法
公开(公告)号：US06405046B1
公开(公告)日：2002-06-11
申请号：US09369687
申请日：1999-08-06
申请人： Krishnan Kumaran , Philip Alfred Whiting
发明人： Krishnan Kumaran , Philip Alfred Whiting
IPC分类号： H04Q722
CPC分类号： H04W16/10 , H04W16/32 , H04W36/04
摘要： A method is described for partitioning the mobile stations occupying each of a plurality of cells of a wireless communication network between an overlay and an underlay. Within each cell, each of that cell's mobile stations is assigned to the overlay if the mobile station's corresponding path loss exceeds a path-loss threshold, and to the underlay if its corresponding path loss lies below the path-loss threshold. The path-loss threshold for each cell is determined according to a procedure that seeks to drive network capacity up while satisfying a rule that relates to intercell interference.
摘要翻译：描述了一种划分占用覆盖层和底层之间的无线通信网络的多个小区中的每一个的移动站的方法。在每个小区内，如果移动站的对应路径损耗超过路径损耗阈值，则该小区的移动站中的每一个被分配给覆盖，如果其对应的路径损耗低于路径损耗阈值，则将其分配给覆盖。根据在满足与小区间干扰有关的规则的同时提高网络容量的过程来确定每个小区的路径损耗阈值。

7. 发明授权

US6094584A Method for operating a wireless telecommunications system 失效
公开(公告)号：US6094584A
公开(公告)日：2000-07-25
申请号：US48443
申请日：1998-03-26
申请人： Sanjeev Khanna , Krishnan Kumaran
发明人： Sanjeev Khanna , Krishnan Kumaran
IPC分类号： H04B7/26 , H04W16/10 , H04B7/00 , H04Q7/20
CPC分类号： H04W16/10 , H04W28/16
摘要： A method for operating a wireless telecommunications system whereby communication channels are efficiently allocated to cells of the system is provided. In accordance with an illustrative embodiment of the present method, call demand information is obtained for each cell in the wireless system and converted to a channel demand. Once the channel demand for each cell is known, a tentative channel allocation is performed. Call demand information can be obtained as frequently as desired to update channel allocation throughout the wireless system. In some embodiments, the method for channel allocation described herein can be used alone to allocate channels. In other embodiments, the present method for channel allocation can be used on an hourly, daily, or other temporal basis, as appropriate, to provide a channel allocation which is then updated on a substantially continuous basis by any conventional dynamic channel allocation scheme. To allocate channels, an "interference graph" that relates interfering cells to one another is defined. When nearest-cell interference is considered, an initial step is performed wherein three channels are iteratively allocated to all cells in the system to remove all groupings within the interference graph comprising three mutually-interfering cells. During the initial step, the allocation of three channels reduces channel demand by one in every cell. Once the interference graph is free of such three-membered groupings, channel demand is reduced more efficiently wherein no more than five channels are allocated to satisfy two units of channel demand. To do so, a decomposition/reconstruction operation is performed wherein the interference graph is segregated into groupings of cells to which channels are allocated. The operation for allocating channels to cells when nearest- and next-to-nearest-cell interference is considered does not use the initial step of allocating three channels. It does, however, proceed in a manner analogous to the decomposition/reconstruction process mentioned above, although the operation is performed on a cell-by-cell basis, rather than with groupings of cells.

8. 发明授权

US11111771B2 Methods of drilling a wellbore within a subsurface region and drilling control systems that perform the methods 有权
公开(公告)号：US11111771B2
公开(公告)日：2021-09-07
申请号：US16022174
申请日：2018-06-28
申请人： Krishnan Kumaran
发明人： Krishnan Kumaran
IPC分类号： E21B44/02 , E21B47/12 , E21B3/02 , E21B45/00 , E21B47/06
摘要： Methods of drilling a wellbore within a subsurface region and drilling control systems that perform the methods. The methods include accessing an objective map and calculating a plurality of critical points of the objective map. The methods also include scoring each critical point and selecting a selected critical point of the plurality of critical points. The selected critical point describes an estimated value of at least one drilling performance indicator for a selected value of at least one independent operational parameter. The methods further include operating the drilling rig at the selected value of the at least one independent operational parameter and, during the operating, determining an actual value of the at least one drilling performance indicator. The methods also include updating the objective map to generate an updated objective map and repeating at least a portion of the methods.

9. 发明授权

US09976399B2 Selectively actuated plungers and systems and methods including the same 有权
公开(公告)号：US09976399B2
公开(公告)日：2018-05-22
申请号：US14597748
申请日：2015-01-15
申请人： Randy C. Tolman , Federico A. Tavarez , Pavlin B. Entchev , Krishnan Kumaran , Michael C. Romer
发明人： Randy C. Tolman , Federico A. Tavarez , Pavlin B. Entchev , Krishnan Kumaran , Michael C. Romer
IPC分类号： E21B23/08 , E21B43/12
CPC分类号： E21B43/121 , E21B23/08 , E21B43/122
摘要： Selectively actuated plungers and systems and methods including the same are disclosed herein. The methods include flowing a wellbore fluid stream in fluid contact with a plunger and in an uphole direction within a wellbore conduit while the plunger is located within a target region of the wellbore conduit. The methods further include maintaining the plunger in a low fluid drag state while a variable associated with the wellbore fluid stream is outside a threshold range and transitioning the plunger to a high fluid drag state responsive to the variable associated with the wellbore conduit being within the threshold range. The methods further include conveying the plunger in the uphole direction within the wellbore conduit. The systems include the plungers and/or hydrocarbon wells that include the plungers.

10. 发明申请

US20140172368A1 FLAME INSTABILITY DETECTION AND IDENTIFICATION IN INDUSTRIAL FURNACES 审中-公开
标题翻译：工业炉火焰不稳定性检测与鉴定
公开(公告)号：US20140172368A1
公开(公告)日：2014-06-19
申请号：US14101677
申请日：2013-12-10
申请人： Weichang Li , Gary T. Dobbs , Limin Song , Peng Xu , Krishnan Kumaran , Mark M. Disko , Jeffrey M. Grenda , San Chhotray , Amy B. Herhold , Duane R. McGregor
发明人： Weichang Li , Gary T. Dobbs , Limin Song , Peng Xu , Krishnan Kumaran , Mark M. Disko , Jeffrey M. Grenda , San Chhotray , Amy B. Herhold , Duane R. McGregor
IPC分类号： G01M99/00 , G06F17/11
CPC分类号： G01M99/00 , G05B23/024 , G06F17/11
摘要： Systems and methods for multi-channel detection of an instability in a furnace comprising a plurality of detectors are disclosed. Each of a plurality of detectors provides a first measurement related to the plurality of burners when the furnace is operating in a stable condition. A stable signal component representation is determined based on the first measurement from each of the plurality of detectors. Each of a plurality of detectors provides a second measurement related to the plurality of burners when the furnace is operating in an unknown state. An unstable signal component representation is determined based on the stable signal component representation and a second measurement from each of the plurality of detectors. An instability is detected based on the unstable signal component representation and an instability threshold.
摘要翻译：公开了一种用于多通道检测包括多个检测器的炉中的不稳定性的系统和方法。当炉子处于稳定状态时，多个检测器中的每个检测器提供与多个燃烧器相关的第一测量。基于来自多个检测器中的每一个的第一测量来确定稳定的信号分量表示。当炉子处于未知状态时，多个检测器中的每个检测器提供与多个燃烧器相关的第二测量。基于稳定的信号分量表示和来自多个检测器中的每一个的第二测量来确定不稳定的信号分量表示。基于不稳定的信号分量表示和不稳定性阈值来检测不稳定性。

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