公开(公告)号：US20080055110A1

公开(公告)日：2008-03-06

申请号：US11831707

申请日：2007-07-31

申请人： Detlef Hahn ,  Volker Peters ,  Cedric Rouatbi ,  Heiko Eggers

发明人： Detlef Hahn ,  Volker Peters ,  Cedric Rouatbi ,  Heiko Eggers

IPC分类号： G01V3/00

CPC分类号： E21B47/182 ,  E21B47/18 ,  G01V11/002

摘要： A mud pulse telemetry system comprises a surface located fluid supply line having a drilling fluid flowing therein. A non-venting pulser is disposed in the drilling fluid in the supply line, and the non-venting pulser is adapted to generate pressure fluctuations in the flowing drilling fluid. A downhole receiver in hydraulic communication with the non-venting pulser is adapted to detect the pressure fluctuations in the drilling fluid. A method for transmitting pressure signals from a surface location to a downhole location in a wellbore, comprises disposing a non-venting pulser in a surface located fluid supply line having a drilling fluid flowing therein. The non-venting pulser is actuated to generate pressure fluctuations in the flowing drilling fluid according to a predetermined encoding scheme. The pressure fluctuations are detected with a downhole receiver in hydraulic communication with the non-venting pulser.

摘要翻译： 泥浆脉冲遥测系统包括具有在其中流动的钻井流体的表面定位的流体供应管线。 非排气脉动器设置在供应管线中的钻井流体中，并且非排气脉动器适于在流动的钻井流体中产生压力波动。 与非排气脉动器液压连通的井下接收器适于检测钻井液中的压力波动。 一种用于将压力信号从井表面位置传送到井眼中的井下位置的方法，包括将非排气脉动器设置在具有在其中流动的钻井流体的位于流体供应管线的表面中。 根据预定的编码方案，启动非排气脉动器以在流动的钻井液中产生压力波动。 在与非排气脉动器液压连通的井下接收器中检测压力波动。

公开(公告)号：US06975244B2

公开(公告)日：2005-12-13

申请号：US10223169

申请日：2002-08-19

申请人： Detlef Hahn ,  Volker Peters ,  Cedric Rouatbi ,  Heiko Eggers

发明人： Detlef Hahn ,  Volker Peters ,  Cedric Rouatbi ,  Heiko Eggers

IPC分类号： H04H60/31 ,  E21B7/08 ,  E21B47/18 ,  G01V11/00 ,  G01V3/00 ,  G01V3/34

CPC分类号： E21B47/182 ,  E21B47/18 ,  G01V11/002

摘要： An oscillating shear valve system for generating pressure fluctuations in a flowing drilling fluid comprising a stationary stator and an oscillating rotor, both with axial flow passages. The rotor oscillates in close proximity to the stator, at least partially blocking the flow through the stator and generating oscillating pressure pulses. The rotor passes through two zero speed positions during each cycle, facilitating rapid changes in signal phase, frequency, and/or amplitude facilitating enhanced, multivalent data encoding. The rotor is driven by a motorized gear drive. In one embodiment, a torsional spring is attached to the motor and the resulting spring mass system is designed to be near resonance at the desired pulse frequency. The system enables the use of multivalent encoding schemes for increasing data rates.

摘要翻译： 一种用于在流动的钻井流体中产生压力波动的摆动剪切阀系统，其包括具有轴向流动通道的固定定子和振荡转子。 转子在定子附近振动，至少部分地阻塞通过定子的流动并产生振荡压力脉冲。 转子在每个循环期间通过两个零速度位置，促进信号相位，频率和/或振幅的快速变化，促进增强的多值数据编码。 转子由电动齿轮传动驱动。 在一个实施例中，扭转弹簧连接到电动机，并且所得到的弹簧质量系统被设计为在期望的脉冲频率处接近谐振。 该系统能够使用多值编码方案来提高数据速率。