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1. 发明授权

US10209390B2 Measuring fluid conductivity 有权
公开(公告)号：US10209390B2
公开(公告)日：2019-02-19
申请号：US14889977
申请日：2013-08-05
申请人： Wei Zhang , Lizheng Zhang , Li Gao , Burkay Donderici
发明人： Wei Zhang , Lizheng Zhang , Li Gao , Burkay Donderici
IPC分类号： G01V3/38 , G01N27/06 , G01V3/28 , G01N33/28 , G01N27/02 , G01N27/08 , E21B49/08
摘要： An apparatus includes a helical flow tube in a formation testing tool. A current injector injects an electromagnetic current into the flow tube. A receiver coil is positioned to produce a receiver coil signal in response to the electromagnetic current. A processor is coupled to the receiver coil to calculate a conductivity of a fluid flowing through the flow tube based on the receiver coil signal.

2. 发明申请

US20150168582A1 DOWNHOLE FLUID RESISTIVITY SENSOR SYSTEMS AND METHODS 有权
标题翻译：井下流体电阻传感器系统和方法
公开(公告)号：US20150168582A1
公开(公告)日：2015-06-18
申请号：US14388193
申请日：2012-03-28
申请人： Wei Zhang , Lizheng Zhang , Li Gao , David Earl Ball
发明人： Wei Zhang , Lizheng Zhang , Li Gao , David Earl Ball
IPC分类号： G01V3/02 , E21B49/08
CPC分类号： G01V3/02 , E21B49/08 , G01V3/20
摘要： Disclosed is a downhole fluid resistivity sensor that includes a ceramic cylinder having a fluid-contacting surface, and at least four metal pins that penetrate a wall of the ceramic cylinder at axially-spaced locations. The pins are bonded to the ceramic to form a pressure seal. The sensor may include a circuit that injects current into a fluid via an outer two of the pins, and measures a resulting voltage via an inner two of the pins. The circuit may also provide an indication of fluid resistivity based at least in part on the resulting voltage. At each of the axially-spaced locations, a set of multiple pins may penetrate the wall to contact the fluid at circumferentially-spaced positions. The fluid-contacting surface may be an inner surface or an outer surface of the ceramic cylinder. A downhole fluid resistivity measurement method is also described.
摘要翻译：公开了一种井下流体电阻率传感器，其包括具有流体接触表面的陶瓷圆筒，以及至少四个在轴向间隔开的位置处穿过陶瓷圆柱壁的金属销。销钉结合到陶瓷上以形成压力密封。传感器可以包括经由外部两个引脚将电流注入流体的电路，并且经由内部两个引脚测量所得到的电压。该电路还可以至少部分地基于所得到的电压来提供流体电阻率的指示。在每个轴向间隔的位置处，一组多个销可以穿透壁以在周向间隔的位置处接触流体。流体接触表面可以是陶瓷圆筒的内表面或外表面。还描述了井下流体电阻率测量方法。

3. 发明授权

US09575199B2 Downhole fluid resistivity sensor systems and methods 有权
标题翻译：井下流体电阻率传感器系统及方法
公开(公告)号：US09575199B2
公开(公告)日：2017-02-21
申请号：US14388193
申请日：2012-03-28
申请人： Wei Zhang , Lizheng Zhang , Li Gao , David Earl Ball
发明人： Wei Zhang , Lizheng Zhang , Li Gao , David Earl Ball
IPC分类号： G01V3/02 , G01V3/20 , E21B49/08
CPC分类号： G01V3/02 , E21B49/08 , G01V3/20
摘要： Disclosed is a downhole fluid resistivity sensor that includes a ceramic cylinder having a fluid-contacting surface, and at least four metal pins that penetrate a wall of the ceramic cylinder at axially-spaced locations. The pins are bonded to the ceramic to form a pressure seal. The sensor may include a circuit that injects current into a fluid via an outer two of the pins, and measures a resulting voltage via an inner two of the pins. The circuit may also provide an indication of fluid resistivity based at least in part on the resulting voltage. At each of the axially-spaced locations, a set of multiple pins may penetrate the wall to contact the fluid at circumferentially-spaced positions. The fluid-contacting surface may be an inner surface or an outer surface of the ceramic cylinder. A downhole fluid resistivity measurement method is also described.
摘要翻译：公开了一种井下流体电阻率传感器，其包括具有流体接触表面的陶瓷圆筒，以及至少四个在轴向间隔开的位置处穿过陶瓷圆柱壁的金属销。销钉结合到陶瓷上以形成压力密封。传感器可以包括经由外部两个引脚将电流注入流体的电路，并且经由内部两个引脚测量所得到的电压。该电路还可以至少部分地基于所得到的电压来提供流体电阻率的指示。在每个轴向间隔的位置处，一组多个销可以穿透壁以在周向间隔的位置处接触流体。流体接触表面可以是陶瓷圆筒的内表面或外表面。还描述了井下流体电阻率测量方法。

4. 发明申请

US20150068736A1 FORMATION ENVIRONMENT SAMPLING APPARATUS, SYSTEMS, AND METHODS 有权
标题翻译：形成环境采样设备，系统和方法
公开(公告)号：US20150068736A1
公开(公告)日：2015-03-12
申请号：US14391679
申请日：2012-05-07
申请人： Ronald Johannes Dirksen , Mark A. Proett , Jim Wilson , Abbas Sami Eyuboglu , Lizheng Zhang , Wei Zhang , Abdolhamid Hadibeik
发明人： Ronald Johannes Dirksen , Mark A. Proett , Jim Wilson , Abbas Sami Eyuboglu , Lizheng Zhang , Wei Zhang , Abdolhamid Hadibeik
IPC分类号： E21B49/08 , E21B34/06 , E21B33/12 , E21B44/00
CPC分类号： E21B49/081 , E21B33/12 , E21B34/06 , E21B44/005 , E21B49/10
摘要： In some embodiments, an apparatus and a system, as well as a method and an article, may operate to advance a sampling and guard probe (100) with a surrounding sealing pad (108) against a borehole wall, to adjust the size of the area associated with a fluid flow inlet of the probe, where the size of the inlet area (104) is selectably and incrementally variable, and to draw fluid into the fluid flow inlet by activating at least one pump (344) coupled to at least one fluid passage (128) in the probe. Additional apparatus, systems, and methods are disclosed.
摘要翻译：在一些实施例中，设备和系统以及方法和物品可以操作以使具有围绕密封垫（108）的采样和保护探针（100）抵靠井眼壁前进，以调整与所述探针的流体流入口相关联的区域，其中所述入口区域（104）的尺寸是可选择地和递增地可变的，并且通过激活耦合到至少一个的至少一个泵（344）将流体引入所述流体流入口中探针中的流体通道（128）。公开了附加装置，系统和方法。

5. 发明授权

US09388687B2 Formation environment sampling apparatus, systems, and methods 有权
标题翻译：地层环境采样仪器，系统和方法
公开(公告)号：US09388687B2
公开(公告)日：2016-07-12
申请号：US14391679
申请日：2012-05-07
申请人： Ronald Johannes Dirksen , Mark A. Proett , Jim Wilson , Abbas Sami Eyuboglu , Lizheng Zhang , Wei Zhang , Abdolhamid Hadibeik
发明人： Ronald Johannes Dirksen , Mark A. Proett , Jim Wilson , Abbas Sami Eyuboglu , Lizheng Zhang , Wei Zhang , Abdolhamid Hadibeik
IPC分类号： E21B49/08 , E21B49/10 , E21B33/12 , E21B34/06 , E21B44/00
CPC分类号： E21B49/081 , E21B33/12 , E21B34/06 , E21B44/005 , E21B49/10
摘要： In some embodiments, an apparatus and a system, as well as a method and an article, may operate to advance a geological formation probe with a surrounding pad to seal the pad against a borehole wall, to adjust the size of the area associated with a fluid flow inlet of the probe, where the size of the inlet area is selectably and incrementally variable, and to draw fluid into the fluid flow inlet by activating at least one pump coupled to at least one fluid passage in the probe.
摘要翻译：在一些实施例中，装置和系统以及方法和物品可以操作以使具有周围垫的地质地层探针前进，以将垫抵靠井眼壁密封，以调整与所述探针的流体流入口，其中所述入口区域的尺寸是可选择地和递增地变化的，并且通过激活耦合到所述探针中的至少一个流体通道的至少一个泵将流体吸入流体流入口。

6. 发明授权

US09732611B2 Method and apparatus for formation testing and sampling when performing subterranean operations 有权
公开(公告)号：US09732611B2
公开(公告)日：2017-08-15
申请号：US14384991
申请日：2012-03-29
申请人： Lizheng Zhang
发明人： Lizheng Zhang
IPC分类号： E21B49/10 , E21B47/01 , E21B47/09 , E21B49/00
CPC分类号： E21B49/10 , E21B47/011 , E21B47/09 , E21B49/005
摘要： Methods and systems for improving operations of a formation tester are disclosed. The formation tester (400) is placed in a wellbore at a location of interest. The formation tester comprises a first isolation pad (402) coupled to a pad carrier (410) and a second isolation pad (404). The first isolation is extendable to substantially seal a probe of the formation tester against a wellbore wall. The first isolation pad is then replaced with the second isolation pad if it is determined that the first isolation pad should be replaced with the second isolation pad.

7. 发明授权

US07761826B1 Method and system for crosstalk analysis 失效
标题翻译：串扰分析方法和系统
公开(公告)号：US07761826B1
公开(公告)日：2010-07-20
申请号：US11782619
申请日：2007-07-24
申请人： Venkat Thanvantri , Shiva Raja , Igor Keller , Lizheng Zhang
发明人： Venkat Thanvantri , Shiva Raja , Igor Keller , Lizheng Zhang
IPC分类号： G06F17/50
CPC分类号： G06F17/5036
摘要： Method and system for crosstalk analysis relating to a statistical crosstalk path delay model that fits into existing static timing framework with little overhead in performance and capacity. More realistic models or assumptions are utilized rather than the more aggressive and less likely deterministic model.
摘要翻译：与统计串扰路径延迟模型相关的串扰分析方法和系统，适用于现有的静态时序框架，性能和容量的开销很小。使用更逼真的模型或假设，而不是更积极和不太可能的确定性模型。

8. 发明授权

US08244491B1 Statistical static timing analysis of signal with crosstalk induced delay change in integrated circuit 有权
标题翻译：统计静态时序分析信号与串扰引起的集成电路延迟变化
公开(公告)号：US08244491B1
公开(公告)日：2012-08-14
申请号：US12343262
申请日：2008-12-23
申请人： Lizheng Zhang
发明人： Lizheng Zhang
IPC分类号： G06F17/50
CPC分类号： G06F17/5031 , G06F2217/10
摘要： A method is provided to evaluate crosstalk effect of aggressor switching upon victim net signal transition time within an integrated circuit comprising: combining a first probability density function (PDF) of first aggressor switching time in response to a first input signal to an aggressor net driver and a second aggressor switching time in response to a second input signal to the aggressor net driver; determining a delay change curve that represents a relationship between delay change of arrival time of a victim net signal transition and relative alignment of the aggressor net driver switching time and a victim net driver switching time; and determining a third PDF of delay change of a transition of the victim net signal based upon the combination and the delay change curve.
摘要翻译：提供了一种方法来评估攻击者切换对集成电路内的受害者网络信号转换时间的串扰效应，包括：将第一侵入者切换时间的第一概率密度函数（PDF）与响应于侵入者网络驱动器的第一输入信号相结合，以及响应于对侵略者网络驱动器的第二输入信号的第二侵权者切换时间; 确定延迟变化曲线，其表示受害者网络信号转换的到达时间的延迟变化与侵略者网络驱动器切换时间的相对对准与受害者网络驱动器切换时间之间的关系; 以及基于所述组合和所述延迟变化曲线来确定所述受害者网络信号的转变的延迟变化的第三PDF。

9. 发明授权

US07689954B2 Efficient statistical timing analysis of circuits 有权
标题翻译：电路的有效统计时序分析
公开(公告)号：US07689954B2
公开(公告)日：2010-03-30
申请号：US11420322
申请日：2006-05-25
申请人： Lizheng Zhang , Yuhen Hu , Chun-ping Chen
发明人： Lizheng Zhang , Yuhen Hu , Chun-ping Chen
IPC分类号： G06F17/50
CPC分类号： G06F17/5031 , G06F17/504 , G06F2217/10 , G06F2217/84
摘要： Statistical timing analysis methods for circuits are described which compensate for circuit elements having correlated timing delays with a high degree of computational efficiency. An quadratic timing model is used to represent each delay element along a circuit path, wherein each element's delay has a first-order relationship to local variations and a second-order relationship to global variations. Propagation of the modeled delays through the circuit is efficiently done via straightforward ADD operations where an input propagates through another element in a circuit path, and via a MAX operation (or an approximation thereof) where two or more inputs merge at an intersection. The inputs to the MAX operator can be tested for gaussianity, and can be processed by the MAX operation (or its approximation) if they are substantially gaussian. Otherwise, they may be stored in a tuple for processing at later points along the circuit path.
摘要翻译：描述了用于补偿具有高计算效率的具有相关定时延迟的电路元件的电路的统计时序分析方法。二次定时模型用于沿着电路路径表示每个延迟元件，其中每个元件的延迟与局部变化和与全局变化的二阶关系具有一级关系。经由电路的建模延迟的传播通过简单的ADD操作有效地进行，其中输入传播通过电路路径中的另一元件，并且经由其中两个或多个输入在交叉点合并的MAX操作（或其近似）。可以对MAX运算符的输入进行高斯测试，如果MAX操作基本为高斯，则可以通过MAX操作（或其近似）进行处理。否则，它们可以存储在元组中，以便在沿着电路路径的稍后点进行处理。

10. 发明申请

US20090319969A1 METHOD AND SYSTEM FOR PERFORMING STATISTICAL LEAKAGE CHARACTERIZATION, ANALYSIS, AND MODELING 有权
标题翻译：执行统计泄漏特征，分析和建模的方法和系统
公开(公告)号：US20090319969A1
公开(公告)日：2009-12-24
申请号：US12143547
申请日：2008-06-20
申请人： Lizheng Zhang , Parveen Khurana , Vassilios Gerousis , Hongliang Chang , Sachin Shrivastava
发明人： Lizheng Zhang , Parveen Khurana , Vassilios Gerousis , Hongliang Chang , Sachin Shrivastava
IPC分类号： G06F17/50
CPC分类号： G06F17/5068 , G06F2217/10 , G06F2217/78
摘要： A method, system, and computer program product are disclosed for performing statistical leakage power characterization to estimate yield of a circuit in terms of leakage power. According to some approaches, this is performed with consideration of state correlation.
摘要翻译：公开了一种方法，系统和计算机程序产品，用于执行统计泄漏功率表征以估计电路在泄漏功率方面的产量。根据一些方法，这是考虑状态相关性来进行的。

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