Data recovery for pulse telemetry using pulse position modulation
    3.
    发明授权
    Data recovery for pulse telemetry using pulse position modulation 有权
    使用脉冲位置调制的脉冲遥测数据恢复

    公开(公告)号:US06963290B2

    公开(公告)日:2005-11-08

    申请号:US10305529

    申请日:2002-11-27

    IPC分类号: E21B47/18 G08C19/20

    CPC分类号: E21B47/18

    摘要: The specification discloses algorithms for error recovery in pulse position modulation-based mud pulse telemetry. More particularly, the specification discloses detection and attempted correction of at least five possible error mechanisms: the missed detection of a pulse that creates an interval greater than maximum; the missed detection of a pulse that results in an interval still within acceptable boundaries; detection of an extra pulse; a pulse shift that results in data in contiguous intervals being affected; and a pulse shift resulting in a single interval data corruption.

    摘要翻译: 该规范公开了基于脉冲位置调制的泥浆脉冲遥测中的误差恢复算法。 更具体地,本说明书公开了至少五种可能的误差机制的检测和尝试校正:产生大于最大值的间隔的脉冲的漏检; 错误检测导致间隔仍在可接受边界内的脉冲; 检测额外脉冲; 导致连续间隔中的数据受到影响的脉冲移位; 并且脉冲移位导致单个间隔数据损坏。

    Structure and method for pulse telemetry
    6.
    发明授权
    Structure and method for pulse telemetry 有权
    脉冲遥测的结构和方法

    公开(公告)号:US06788219B2

    公开(公告)日:2004-09-07

    申请号:US10306487

    申请日:2002-11-27

    IPC分类号: H04L2730

    CPC分类号: G01V11/002

    摘要: A mud pulse telemetry technique that uses a number of bits per interval based on parameters of the pulse position modulation system in order to reduce data transfer time in a pulse position modulation system. More particularly, depending on parameters of the pulse position modulation such as the minimum-time and the bit-width, it may be possible to decrease overall transmission time by splitting values having a larger number of bits into multiple transmissions with each transmission having a smaller number of bits.

    摘要翻译: 一种泥浆脉冲遥测技术,其基于脉冲位置调制系统的参数使用每个间隔的位数,以减少脉冲位置调制系统中的数据传输时间。 更具体地,根据诸如最小时间和位宽的脉冲位置调制的参数,可以通过将具有较大位数的值分成多个传输来减少总传输时间,每个传输具有较小的 位数。