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公开(公告)号：US06648083B2
公开(公告)日：2003-11-18
申请号：US10040701
申请日：2001-10-26
IPC分类号： E21B4900
摘要： A method is disclosed for determining a characteristic of a mud mixture surrounding a drilling tool within a borehole in which a drilling tool is received. The method includes turning the tool in the borehole. Energy is applied into the borehole from an energy source disposed in the tool. Measurement signals are received at a sensor disposed in the tool from a location around the borehole. The cross-section of the borehole is separated into at least a first sector and a second sector. A first measurement signal from the first sector is substantially in response to returning energy which results from the interaction of the applied energy with the mud mixture. A second measurement signal from the second sector is substantially in response to returning energy which results from the interaction of the applied energy with the formation. An indication of an intrinsic characteristic of the mud mixture is derived from the first measurement signals associated with the first sector of the borehole.
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2.发明授权Subsurface borehole evaluation and downhole tool position determination methods 有权地下钻孔评估和井下工具位置确定方法公开(公告)号：US06891777B2
公开(公告)日：2005-05-10
申请号：US10174881
申请日：2002-06-19
申请人： Miguel F. Pabon , W. Robert Sloan
发明人： Miguel F. Pabon , W. Robert Sloan
CPC分类号： E21B47/082 , G01V1/44
摘要： Methods for processing ultrasonic signal data to evaluate subsurface properties and tool orientation. Acoustic signals are transmitted into a plurality of azimuthal borehole positions. Formation echo signal transit time distributions are then determined in a plurality of azimuthal sectors for the acoustic signals. Front face echo signal transit times are also measured and farther-mode and closer-mode transit times are determined for the distribution of formation echo signals. Farther and closer tool standoffs are determined for the azimuthal sectors and a borehole diameter is determined from a summation including standoffs in opposing sectors. The standoffs are also used to determine a preferential tool position.
摘要翻译： 用于处理超声信号数据以评估地下特性和工具取向的方法。 声信号被传送到多个方位钻孔位置。 然后在声信号的多个方位角扇区中确定形成回波信号传播时间分布。 还测量了前面回波信号传播时间，并确定了地层回波信号分布的更远模式和近距离模式传播时间。 确定方位角扇区的更为紧密的工具对位，并且从包括相对扇区中的间隔的求和确定井眼直径。 支座也用于确定优先的刀具位置。
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3.发明授权Apparatus and method for the suppression of microphonic noise in proportional counters for borehole logging-while-drilling 失效用于在钻孔中钻孔测井的比例计数器中抑制麦克风噪声的装置和方法
公开(公告)号：US5635711A
公开(公告)日：1997-06-03
申请号：US637567
申请日：1996-04-25
摘要： A method and apparatus is disclosed for suppressing microphonic noise in proportional counter neutron detection in borehole logging-while-drilling measurements. Noise is reduced by (1) applying the outputs of two detectors respectively to positive and negative inputs of a differential amplifier; (2) generating output pulses by applying the output of the differential amplifier to positive and negative comparators to produce first and second output pulses; (3) counting output pulses as neutron counts only if the first or second output pulses have time lengths less than a predetermined time length; and (4) rejecting the output pulses in the count of pulses as neutron counts if first and second output pulses coincide in time.
摘要翻译： 公开了一种用于在钻孔测井同时钻孔测量中抑制比例反中子检测中的麦克风噪声的方法和装置。 通过（1）将两个检测器的输出分别施加到差分放大器的正输入和负输入，降低噪声; （2）通过将差分放大器的输出施加到正和负比较器来产生输出脉冲以产生第一和第二输出脉冲; （3）仅当第一或第二输出脉冲具有小于预定时间长度的时间长度时，将输出脉冲计数为中子计数; 以及（4）如果第一和第二输出脉冲在时间上一致，则将脉冲计数中的输出脉冲作为中子计数。
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公开(公告)号：US06307199B1
公开(公告)日：2001-10-23
申请号：US09310893
申请日：1999-05-12
IPC分类号： G01V100
摘要： A system is disclosed for compensating well logs for adverse effects of the borehole and near borehole formation effects. The system is configured primarily for processing logging-while-drilling (LWD) density measurements, and includes means for generating a one-dimensional density log which is corrected for adverse effects of logging tool standoff and “dipping” beds penetrated by the borehole. The system is, however, applicable to any type of LWD or other type of logging system which requires borehole corrections, and which responds to variations in formation properties in a plane perpendicular to the borehole. The system can also be modified to include LWD apparatus using sensors that require no borehole corrections, and only require corrections for dipping beds. The system is ideally suited for logging equipment using two sensors, but can be modified for use with single sensor systems or systems using more than two sensors.
摘要翻译： 公开了一种用于补偿测井的井筒的不利影响和近井眼形成效应的系统。 该系统主要用于处理钻井测井（LWD）密度测量，并且包括用于生成一维密度测井的装置，其被校正用于测井工具分离的不利影响和钻孔渗透的“浸渍”床。 然而，该系统适用于需要钻孔校正的任何类型的LWD或其他类型的测井系统，其响应垂直于钻孔的平面中的地层特性的变化。 该系统也可以被修改为包括使用不需要钻孔校正的传感器的LWD装置，并且仅需要对浸渍床进行校正。 该系统非常适用于使用两个传感器记录设备，但可以修改为使用单个传感器系统或使用两个以上传感器的系统。
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