公开(公告)号：US20150331133A1

公开(公告)日：2015-11-19

申请号：US14810916

申请日：2015-07-28

申请人： Medhat W. Mickael ,  Dale A. Jones

发明人： Medhat W. Mickael ,  Dale A. Jones

IPC分类号： G01V1/44

CPC分类号： G01V1/44

摘要： A monopole acoustic transmitter for logging-while-drilling comprising as a ring that comprises one or more piezoelectric arc segments. The ring is oriented in a plane whose normal is essentially coincident with the major axis of a logging tool in which it is disposed. The ring disposed within a recess on the outer surface of a short, cylindrical insert. The insert is inserted into a drill collar, rather than into the wall of the collar. The ring can comprise a continuous ring of piezoelectric material, or alternately arc segments or active ring segments of piezoelectric ceramic bonded to segments of other materials such as alumina to increase the frequency or heavy metals such as tungsten to reduce the frequency. The material and dimensions of the material used in-between the piezoelectric segments is chosen to alter the frequency of the ring.

摘要翻译： 一种用于钻井同步钻井的单极声发射器，其包括包括一个或多个压电弧段的环。 该环在平面中定向，其平面基本上与其设置的测井工具的长轴重合。 环设置在短圆柱形插入件的外表面上的凹部内。 插入件插入到钻铤中，而不是插入到轴环的壁中。 环可以包括压电材料的连续环，或者交替地将压电陶瓷的弧形段或活性环段结合到诸如氧化铝的其它材料的段以增加频率或诸如钨的重金属以降低频率。 选择在压电段之间使用的材料的材料和尺寸来改变环的频率。

公开(公告)号：US20090022011A1

公开(公告)日：2009-01-22

申请号：US11780957

申请日：2007-07-20

申请人： Medhat W. Mickael ,  Dale A. Jones

发明人： Medhat W. Mickael ,  Dale A. Jones

IPC分类号： G01V1/40

CPC分类号： G01V1/52 ,  H04R17/00

摘要： An acoustic transmitter with preferably a plurality of piezoelectric plates configured to optimized acoustic pressure output within a desired frequency range while meeting physical restrictions of LWD and MWD logging systems. The transmitter is disposed in a recess in the perimeter of a logging tool housing to reduce acoustic pressure waves transmitted directly along the tool housing and to optimize acoustic energy transmission into the borehole environs. In order to increase acoustic pressure output at a desired logging frequency range, the plurality of piezoelectric plates are connected electrically in parallel and fired simultaneously. The polarity of the plates and the wiring arrangement are such that each plate expands or contracts in a common direction during simultaneous firing by an applied voltage. The desired output frequency is obtained by selectively polarizing and dimensioning the plates within the plate assembly. The plate assembly is preferably disposed within an oil filled pressure housing that is pressure and temperature compensated.

摘要翻译： 声发射器优选地具有多个压电板，其构造成在期望的频率范围内优化声压输出，同时满足LWD和MWD测井系统的物理限制。 发射器设置在测井工具外壳的周边的凹部中，以减少直接沿着工具壳体传输的声压波，并优化到井眼周围的声能传输。 为了在期望的测井频率范围内增加声压输出，多个压电板电并联并同时烧结。 板的极性和布线布置使得每个板在通过施加的电压的同时点火期间沿共同的方向膨胀或收缩。 期望的输出频率通过选择性地使板组件内的板极化和尺寸来获得。 板组件优选地设置在压力和温度补偿的充油压力壳体内。

公开(公告)号：US06665616B2

公开(公告)日：2003-12-16

申请号：US10066839

申请日：2002-02-04

申请人： Medhat W. Mickael

发明人： Medhat W. Mickael

IPC分类号： G01V504

CPC分类号： G01V5/101 ,  G01V5/104

摘要： Measurements from many logging instruments such as Gamma ray counts from a pulsed neutron instrument, typically have a spectrum that contains a plurality of exponentially decaying components. The slowest decaying component is obtained by fitting a single exponential over the tail end of the data and selecting a beginning for the fitting window that minimizes the product of the chi-square and the standard error of the fit. The single determined component may be subtracted from the data and the process repeated to give additional components. The determined components are indicative of thermal neutron capture cross-sections.

摘要翻译： 来自许多测井仪器的测量，例如来自脉冲中子仪器的伽马射线计数，通常具有包含多个指数衰减分量的光谱。 通过在数据的尾端拟合单个指数，并选择最小化卡方乘积和拟合的标准误差的拟合窗口的开始来获得最慢的衰减分量。 可以从数据中减去单个确定的分量，重复该过程以产生附加组件。 确定的组分表示热中子捕获截面。

公开(公告)号：US06590202B2

公开(公告)日：2003-07-08

申请号：US09851635

申请日：2001-05-08

申请人： Medhat W. Mickael

发明人： Medhat W. Mickael

IPC分类号： G01V514

CPC分类号： G01V5/125

摘要： A nuclear logging-while-drilling measuring systems, and the correction of the formation property measurements for adverse effects of instrument standoff from the borehole wall, is disclosed. Detector responses for one or more downhole detectors are sampled and recorded over a time segment. The response samples are then sorted by magnitude, and a running integral of the sorted samples as a function of time is performed over the time segment. Linear segments are then fitted to the running integral, wherein each straight line segment is a function of one or more formation properties, and also a function of the standoff distance of the detector from the borehole wall. Segments are then combined to obtain a measure of one or more formation properties of interest such as formation density, where the adverse effects of borehole standoff are minimized. Standoff magnitude is also obtained and can be used to correct other logs, such as a neutron porosity log, for adverse effects of tool standoff and borehole size. No independent caliper of the borehole is required to perform the standoff correction.

公开(公告)号：US06566649B1

公开(公告)日：2003-05-20

申请号：US09579971

申请日：2000-05-26

申请人： Medhat W. Mickael

发明人： Medhat W. Mickael

IPC分类号： G01V504

CPC分类号： G01V5/125

摘要： A nuclear logging-while-drilling measuring systems, and the correction of the formation property measurements for adverse effects of instrument standoff from the borehole wall, is disclosed. Detector responses for one or more downhole detectors are sampled and recorded over a time segment. The response samples are then sorted by magnitude, and a running integral of the sorted samples as a function of time is performed over the time segment. Linear segments are then fitted to the running integral, wherein each straight line segment is a function of one or more formation properties, and also a function of the standoff distance of the detector from the borehole wall. Segments are then combined to obtain a measure of one or more formation properties of interest, where the adverse effects of borehole standoff are minimized. Standoff magnitude is also obtained. No independent caliper of the borehole is required to perform the standoff correction.

摘要翻译： 公开了一种核测井钻井测量系统，以及对来自井壁的仪表间隔的不利影响的地层性能测量的校正。 对一个或多个井下检测器的检测器响应在时间段进行采样和记录。 然后将响应样本按大小排序，并且在时间段上执行作为时间的函数的排序样本的运行积分。 然后将线性段拟合到运行积分，其中每个直线段是一个或多个地层特性的函数，以及检测器与钻孔壁的间隔距离的函数。 然后组合段以获得一个或多个感兴趣的形成特性的量度，其中井眼间隔的不利影响被最小化。 也获得了间隔幅度。 不需要独立的钻孔尺度来执行间隔校正。

公开(公告)号：US5659169A

公开(公告)日：1997-08-19

申请号：US698438

申请日：1996-08-19

申请人： Medhat W. Mickael ,  Gary L. Mathis

发明人： Medhat W. Mickael ,  Gary L. Mathis

IPC分类号： G01V5/12

CPC分类号： G01V5/12

摘要： A method of measuring the density of an earth formation penetrated by a wellbore. The method includes irradiating the earth formation with gamma rays from a source, detecting Compton scattered gamma rays at a plurality of locations spaced apart from the source along the wellbore, calculating an apparent density of the formation from the detected gamma counting rate at each of the locations, calculating differences in apparent density between pairs of the apparent densities, calculating a correction for the apparent density from a distal one of the locations by scaling the differences in apparent density according to an empirical relationship, and calculating the density by combining the correction with the apparent density from the distal one of the locations. In a preferred embodiment, the empirical relationship is determined by measuring the apparent densities and differences in apparent density at a plurality of known values of density of the formation and a plurality of values of density and thickness of a medium interposed between the formation, and the source and the spaced apart locations. Scaling coefficients are determined by minimizing the value of an error function representing the difference between the known value of the density and the density determined according to the empirical relationship.

摘要翻译： 测量井眼渗透的地层密度的方法。 该方法包括用来自源的γ射线照射地层，从沿着井筒的源与间隔开的多个位置处检测出康普顿散射的伽马射线，根据检测到的伽马计数率来计算地层的表观密度 位置，计算表观密度对之间的表观密度的差异，通过根据经验关系缩放表观密度的差异来计算从远端一个位置的表观密度的校正，以及通过将校正与 从远处的一个位置的表观密度。 在优选实施例中，经验关系通过测量多个已知的地层密度值的表观密度和表观密度的差异以及插入在地层之间的介质的密度和厚度的多个值来确定 源和间隔开的位置。 通过最小化表示密度的已知​​值和根据经验关系确定的密度之间的差异的误差函数的值来确定缩放系数。

公开(公告)号：US08279713B2

公开(公告)日：2012-10-02

申请号：US11780957

申请日：2007-07-20

申请人： Medhat W. Mickael ,  Dale A. Jones

发明人： Medhat W. Mickael ,  Dale A. Jones

IPC分类号： H04R17/00

CPC分类号： G01V1/52 ,  H04R17/00

摘要： An acoustic transmitter with preferably a plurality of piezoelectric plates configured to optimized acoustic pressure output within a desired frequency range while meeting physical restrictions of LWD and MWD logging systems. The transmitter is disposed in a recess in the perimeter of a logging tool housing to reduce acoustic pressure waves transmitted directly along the tool housing and to optimize acoustic energy transmission into the borehole environs. In order to increase acoustic pressure output at a desired logging frequency range, the plurality of piezoelectric plates are connected electrically in parallel and fired simultaneously. The polarity of the plates and the wiring arrangement are such that each plate expands or contracts in a common direction during simultaneous firing by an applied voltage. The desired output frequency is obtained by selectively polarizing and dimensioning the plates within the plate assembly. The plate assembly is preferably disposed within an oil filled pressure housing that is pressure and temperature compensated.

摘要翻译： 声发射器优选地具有多个压电板，其构造成在期望的频率范围内优化声压输出，同时满足LWD和MWD测井系统的物理限制。 发射器设置在测井工具外壳的周边的凹部中，以减少直接沿着工具壳体传输的声压波，并优化到井眼周围的声能传输。 为了在期望的测井频率范围内增加声压输出，多个压电板电并联并同时烧结。 板的极性和布线布置使得每个板在通过施加的电压的同时点火期间沿共同的方向膨胀或收缩。 期望的输出频率通过选择性地使板组件内的板极化和尺寸来获得。 板组件优选地设置在压力和温度补偿的充油压力壳体内。

公开(公告)号：US20120026831A1

公开(公告)日：2012-02-02

申请号：US12848430

申请日：2010-08-02

申请人： Medhat W. Mickael

发明人： Medhat W. Mickael

IPC分类号： G01V1/52 ,  G01S15/88 ,  G01V1/44

CPC分类号： G01V1/52 ,  G01V1/46 ,  G01V1/48 ,  G01V1/50 ,  G01V2210/6222 ,  G01V2210/626

摘要： A logging system for measuring anisotrophic properties of the materials penetrated by a borehole. A downhole or “logging tool” element of the system comprises a source section that comprises either a unipole or a dipole acoustic source. The receiver section comprises a plurality of receiver stations disposed at different axial spacings from the acoustic source. Each receiver station comprises one or more acoustic receivers. The system requires that the source and receiver sections rotate synchronously as the logging tool is conveyed along the borehole. Receiver responses are measured in a plurality of azimuthal angle segments and processed as a function of rotation angle of the tool. The logging system can be embodied as a logging-while-drilling system, a measurement-while-drilling system, and a wireline system that synchronously rotates source and receiver sections. All embodiments require that the acoustic source operate at a relatively high frequency.

摘要翻译： 用于测量钻孔渗透的材料的各向异性特征的测井系统。 系统的井下或“测井工具”元件包括源单元，其包括单极或偶极声源。 接收器部分包括设置在与声源不同轴向间隔的多个接收器台。 每个接收器站包括一个或多个声学接收器。 当测井工具沿钻孔传送时，系统要求源和接收器部分同步旋转。 接收器响应在多个方位角段中测量，并作为工具旋转角度的函数进行处理。 测井系统可以体现为同步钻井系统，钻井测量系统和同步旋转源和接收器部分的有线系统。 所有实施例都要求声源以相对高的频率工作。

公开(公告)号：US20090129203A1

公开(公告)日：2009-05-21

申请号：US11943185

申请日：2007-11-20

申请人： Dale A. Jones ,  Medhat W. Mickael

发明人： Dale A. Jones ,  Medhat W. Mickael

IPC分类号： E21B47/16

CPC分类号： B06B1/0618 ,  G01V1/40

摘要： A monopole acoustic transmitter with at least one disc assembly with a plurality of piezoelectric discs configured to optimized acoustic pressure output within a desired frequency range while meeting physical restrictions of LWD and MWD logging systems. The transmitter is disposed in a recess or “slot” in the perimeter of a logging tool housing to reduce acoustic pressure waves transmitted directly along the tool housing and to optimize acoustic energy transmission into the borehole environs. In order to increase acoustic pressure output at a desired logging frequency range, the plurality of piezoelectric discs in each of at least one disc assembly are connected electrically in parallel and fired simultaneously. The polarity of the discs and the wiring arrangement are such that each disc expands or contracts in a common direction during simultaneous firing by an applied voltage. The desired output frequency is obtained by selectively polarizing and dimensioning the discs within the one or more disc assemblies. Each disc assembly is preferably disposed within an oil filled pressure housing that is pressure and temperature compensated. The axis of the at least one disc assembly can be parallel or perpendicular to the major axis of the logging tool.

摘要翻译： 具有至少一个盘组件的单极声发射器，其具有多个压电盘，其构造成在期望的频率范围内优化声压输出，同时满足LWD和MWD测井系统的物理限制。 变送器设置在测井工具外壳周边的凹槽或“槽”中，以减少沿工具外壳直接传输的声压波，并优化到井眼周围的声能传输。 为了在期望的测井频率范围内增加声压输出，至少一个盘组件中的每一个中的多个压电盘电并联并同时烧结。 盘和布线布置的极性使得每个盘在施加的电压的同时点火期间沿共同的方向膨胀或收缩。 期望的输出频率通过选择性地使一个或多个盘组件中的盘偏振和尺寸来获得。 每个盘组件优选地设置在压力和温度补偿的充油压力壳体内。 至少一个盘组件的轴线可以平行或垂直于测井工具的长轴。

公开(公告)号：US06666285B2

公开(公告)日：2003-12-23

申请号：US10078199

申请日：2002-02-15

申请人： Dale A. Jones ,  Medhat W. Mickael

发明人： Dale A. Jones ,  Medhat W. Mickael

IPC分类号： E21B4700

CPC分类号： E21B47/01

摘要： Logging-while-drilling gamma ray back scatter density system with elements configured to minimize material between sensor and the borehole environs, maximize shielding and collimation efficiency, and increase operational reliability and ruggedness. The system comprises a drill collar with a cavity in the outer wall, and an instrument package containing a sensor. The instrument package is disposed in the cavity and protrudes from the outer wall of the collar. Embodied as a density LWD system, the sensor consists of a gamma ray source and two detectors mounted within an instrument package framework made of high Z shielding material. A stabilized containing an alignment channel in the inner surface is disposed around the collar and receives the protrusion. The source and detectors are preferably positioned within the instrument package so that they fall within a radius defined by the outer surface of the collar. The source is threaded directly into the high Z material framework of the instrument package.