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    Quantitative method for evaluating velocity model quality
    41.
    发明授权
    Quantitative method for evaluating velocity model quality 失效
    评估速度模型质量的定量方法

    公开(公告)号：US5050131A

    公开(公告)日：1991-09-17

    申请号：US643387

    申请日：1991-01-17

    Applicant: Shein S. Wang ,  Douglas W. Hanson ,  Thomas D. Cavanaugh

    Inventor： Shein S. Wang ,  Douglas W. Hanson ,  Thomas D. Cavanaugh

    IPC: G01V1/30

    CPC classification number: G01V1/303

    Abstract: A method for quantitatively determining an accurate subsurface velocity prior to data migration includes steps whereby the accuracy of the velocity can be defined by measuring the deviation in depth as a function of offset in the common reflection point (CRP) gather. A point on reflector is selected and the CRP gather is formed. If the image is not flat, the velocity is adjusted until it is flat. The velocity is decreased and the far offset end of the image will be imaged to shallower depth than the near offset end. The velocity is increased and the image will tilt down at the far offset end. An error is defined which is the theoretical accuracy limit for the determination of velocity using the CRP method. A factor is defined that indicates the reliability of the image for a reflector.

    Abstract translation: 用于在数据迁移之前定量确定精确的地下速度的方法包括以下步骤：可以通过测量在公共反射点（CRP）聚集中作为偏移的函数的深度偏差来定义速度的精度。 选择反射器上的点，形成CRP聚集。 如果图像不平坦，则调整速度直到平坦。 速度降低，图像的远偏移端将成像到比近偏移端更浅的深度。 速度增加，图像将在远偏移端倾斜。 定义了使用CRP方法确定速度的理论精度极限的误差。 一个因素被定义为指示反射器的图像的可靠性。

    Rotary drillstring guidance by feedrate oscillation
    42.
    发明授权
    Rotary drillstring guidance by feedrate oscillation 失效
    通过进给振荡旋转钻柱引导

    公开(公告)号：US4995465A

    公开(公告)日：1991-02-26

    申请号：US441788

    申请日：1989-11-27

    Applicant: Jeffrey L. Beck ,  Larry D. Taylor

    Inventor： Jeffrey L. Beck ,  Larry D. Taylor

    IPC: E21B7/06 ,  E21B7/08 ,  E21B44/00 ,  E21B47/022

    CPC classification number: E21B7/06 ,  E21B44/00 ,  E21B47/022

    Abstract: A drilling method and apparatus for directional drilling of a borehole. The apparatus includes a retrievably mounted downhole monitor for sensing parameters of the drill rod to which a drill bit is attached. A bent-sub is connected with said drill rod behind the drill bit to position the drill bit to extend angularly with respect to the drill rod. An actuator such as a hydraulic ram is provided for exerting thrust along the axis of the drill rod on said drill bit. The drill rod and drill bit is not rotated with the use of a downhole motor. Based upon the signals received from the downhole monitor, the drill rod and bit are pulsed to effect the desired trajectory of the drilling.

    Abstract translation: 钻孔定向钻孔的钻孔方法和装置。 该装置包括可检测地安装的井下监测器，用于感测钻头附接到的钻杆的参数。 弯头与钻杆后面的钻杆连接，以使钻头相对于钻杆成角度地延伸。 提供诸如液压油缸的致动器，用于沿着所述钻头上的钻杆的轴线施加推力。 钻杆和钻头不会使用井下电机旋转。 基于从井下监测器接收的信号，钻杆和钻头被脉冲以实现所需的钻井轨迹。

    Seismic imaging of steeply dipping geologic interfaces
    43.
    发明授权
    Seismic imaging of steeply dipping geologic interfaces 失效
    陡倾斜地质界面的地震成像

    公开(公告)号：US4987561A

    公开(公告)日：1991-01-22

    申请号：US532156

    申请日：1990-06-01

    Applicant: David W. Bell

    Inventor： David W. Bell

    IPC: G01V1/00

    CPC classification number: G01V1/003

    Abstract: A method for determining the location of steeply dipping subsurfaces includes acquiring seismic reflection data, identifying select data which has characteristics indicating that the acoustic pulses which it represents have been reflected from a substantially horizontal interface and a steeply dipping interface, analyzing the select data to locate the steeply dipping interface and displaying the analyzed data.

    Abstract translation: 用于确定陡倾斜次表面的位置的方法包括获取地震反射数据，识别具有指示其表示的声脉冲已经从基本上水平的界面反射的特征的特征选择数据和陡峭的倾斜界面，分析选择数据以定位 陡峭的浸渍界面并显示分析的数据。

    Composition and placement process for oil field chemicals
    44.
    发明授权
    Composition and placement process for oil field chemicals 失效
    油田化学品的组成和放置过程

    公开(公告)号：US4986354A

    公开(公告)日：1991-01-22

    申请号：US244752

    申请日：1988-09-14

    Applicant: Lisa A. Cantu ,  Marvin E. Yost

    Inventor： Lisa A. Cantu ,  Marvin E. Yost

    IPC: C09K8/516 ,  C09K8/536 ,  C09K8/92

    CPC classification number: C09K8/92 ,  C09K8/516 ,  C09K8/536 ,  Y10S166/902 ,  Y10S507/902 ,  Y10S507/925 ,  Y10T428/2985 ,  Y10T428/2989

    Abstract: Oil field chemicals are incorporated in microcapsules of the condensation product of hydroxyacetic acid or the co-condensation product of hydroxyacetic acid and other compounds containing hydroxy-, carboxylic acid-, or hydroxycarboxylic acid moieties. The microcapsules are then introduced into an oil well bore and/or subterranean oil formation where the microcapsules dissolve over a period of time and release the oil field chemicals.

    Abstract translation: 油田化学品被掺入羟基乙酸或羟基乙酸的共缩合产物与含有羟基，羧酸或羟基羧酸部分的其它化合物的缩合产物的微胶囊中。 然后将微胶囊引入油井孔和/或地下油层，其中微胶囊在一段时间内溶解并释放油田化学品。

    Method for derivation of internal velocities from post-migration parts
    46.
    发明授权
    Method for derivation of internal velocities from post-migration parts 失效
    从迁移后部分推导内部速度的方法

    公开(公告)号：US4964089A

    公开(公告)日：1990-10-16

    申请号：US455692

    申请日：1989-12-22

    Applicant: Shein S. Wang ,  Douglas W. Hanson ,  Thomas D. Cavanaugh

    Inventor： Shein S. Wang ,  Douglas W. Hanson ,  Thomas D. Cavanaugh

    IPC: G01V1/28 ,  G01V1/30

    CPC classification number: G01V1/301 ,  G01V1/282

    Abstract: A method for derivation of interval velocities from post-migration parts first includes the step of determining the apparent depth and slope of an event. The apparatus depth of an event is measured. The travel time of the recorded reflection for a particular offset is determined by ray-tracing through the old model and recorded. A trial velocity is assigned to the layer between events in the new model. The depth of the reflector is varied up or down until the computed travel time agrees with the measured travel time, keeping the source/receiver separation constant. A new velocity for the layer between reflectors is selected for which the depths at each offset are the same.

    Apparatus for detecting and locating leakage in underwater structures
    50.
    发明授权
    Apparatus for detecting and locating leakage in underwater structures 失效
    用于检测和定位水下结构泄漏的装置

    公开(公告)号：US4949076A

    公开(公告)日：1990-08-14

    申请号：US258298

    申请日：1988-10-13

    Applicant: Laymond D. Wann

    Inventor： Laymond D. Wann

    IPC: G01M3/16 ,  G01M3/18

    CPC classification number: G01M3/185 ,  G01M3/16

    Abstract: A system for leak detection in underwater structures wherein each critical leakage test point is maintained dry by an enclosure and a test cable is led down through the series of enclosures in fluid-tight manner to support a test probe within the dry test point volume. The test cable is a coaxial cable of selected characteristic impedance and each probe consists of a spirally wound, open-end dual pair supported on a plastic stub so as to constitute a parallel resonant circuit at a selected frequency. Thereafter, a test pulse is conducted down the coaxial cable and the impedance of any probe will be altered by the presence of water to produce a reflected pulse back up the coaxial cable to be detected and input to gating and counting circuitry to determine signal travel duration and, therefore, distance along the cable, as processing, printing and readout components provide output indications.

    Abstract translation: 一种用于水下结构中的泄漏检测系统，其中每个临界泄漏测试点由外壳保持干燥，并且测试电缆以流体密封的方式被引导通过一系列外壳，以将测试探针支撑在干燥测试点体积内。 测试电缆是所选特性阻抗的同轴电缆，每个探头由支撑在塑料短截线上的螺旋卷绕的开口双对组成，以便以选定的频率构成并联谐振电路。 此后，测试脉冲沿着同轴电缆传导，并且任何探头的阻抗将由于存在而改变以产生反射脉冲，以将待检测的同轴电缆备份并输入到门控和计数电路以确定信号行进持续时间 因此，沿着电缆的距离，作为处理，打印和读出组件提供输出指示。

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