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    • 23. 发明授权
    • Method of drilling in response to looking ahead of the bit
    • 响应于钻头前方的钻孔方法
    • US06791469B1
    • 2004-09-14
    • US10264731
    • 2002-10-04
    • M. Vikram RaoPaul F. Rodney
    • M. Vikram RaoPaul F. Rodney
    • G01V300
    • E21B47/00E21B49/00G01V1/44
    • A method for improving ROP and reducing hazards in drilling subterranean wells by using an acoustical system 15 to look ahead of the drill bit 14, detects and analyzes geologic features ahead of the bit 14 which may be qualified as drilling hazards 17. Detection of such hazards 17 may facilitate use of more aggressively penetrating bits 14 such as PDC bits as opposed to roller cone bits. In addition, other drilling parameters may be adjusted to improve ROP due to the ability to timely respond to identified hazards 17 before they may be detrimentally encountered by the bit 14. The acoustic system 15 may look ahead of the bit 14 by at least 100 meters, using propagated acoustic waves 19 to locate changes in acoustic impedance which may represent drilling hazards 17. In addition, bulk resistivity ahead of the bit 14 may also be measured and used to locate drilling hazards 17. The measured properties of the investigated formation may facilitate optimizing the design and operation of a drilling program so as to improve the rate of penetration.
    • 通过使用声学系统15向前看钻头14来改善钻井地下井中的ROP并减少危害的方法,检测并分析钻头14之前的地质特征,这可以被认定为钻井危险17.检测这种危险 17可以有助于使用更积极地穿透的位14,例如PDC位而不是辊锥位。 此外,可以调整其他钻孔参数以改善ROP,这是由于在它们可能不利地被钻头14遇到之前及时响应所识别的危险17的能力。声学系统15可以将钻头14向前看至少100米 使用传播的声波19来定位可能代表钻井危险的声阻抗的变化17.此外,钻头14之前的体电阻率也可以被测量并用于定位钻井危险17.所研究的地层的测量特性可以有利于 优化钻井计划的设计和运行,以提高渗透率。
    • 24. 发明授权
    • Method of drilling in response to looking ahead of drill bit
    • 响应钻头前方的钻孔方法
    • US06480118B1
    • 2002-11-12
    • US09537455
    • 2000-03-27
    • M. Vikram Rao
    • M. Vikram Rao
    • G01V300
    • E21B47/00E21B49/00G01V1/44
    • A method for improving ROP and reducing hazards in drilling subterranean wells by using an acoustical system 15 to look ahead of the drill bit 14, detects and analyzes geologic features ahead of the bit 14 which may be qualified as drilling hazards 17. Detection of such hazards 17 may facilitate use of more aggressively penetrating bits 14 such as PDC bits as opposed to roller cone bits. In addition, other drilling parameters may be adjusted to improve ROP due to the ability to timely respond to identified hazards 17 before they may be detrimentally encountered by the bit 14. The acoustic system 15 may look ahead of the bit 14 by at least 100 meters, using propagated acoustic waves 19 to locate changes in acoustic impedance which may represent drilling hazards 17. In addition, bulk resistivity ahead of the bit 14 may also be measured and used to locate drilling hazards 17. The measured properties of the investigated formation may facilitate optimizing the design and operation of a drilling program so as to improve the rate of penetration.
    • 通过使用声学系统15向前看钻头14来改善钻井地下井中的ROP并减少危害的方法,检测并分析钻头14之前的地质特征,这可以被认定为钻井危险17.检测这种危险 17可以有助于使用更积极地穿透的位14,例如PDC位而不是辊锥位。 此外,可以调整其他钻孔参数以改善ROP,这是由于在它们可能不利地被钻头14遇到之前及时响应所识别的危险17的能力。声学系统15可以将钻头14向前看至少100米 使用传播的声波19来定位可能代表钻井危险的声阻抗的变化17.此外,钻头14之前的体电阻率也可以被测量并用于定位钻井危险17.所研究的地层的测量特性可以有利于 优化钻井计划的设计和运行,以提高渗透率。
    • 25. 发明授权
    • Valve for drilling fluid telemetry systems
    • 钻井液遥测系统阀门
    • US4790393A
    • 1988-12-13
    • US460461
    • 1983-01-24
    • Michael L. LarrondeManmohan S. KalsiM. Vikram Rao
    • Michael L. LarrondeManmohan S. KalsiM. Vikram Rao
    • E21B47/18E21B21/10
    • E21B47/18
    • A mud pulse telemetry system for imparting data pulses to drilling fluids circulating in a drill string including an improved valve arrangement for modulating the pressure of the circulating drilling fluid is disclosed. A shear-type valve is arranged in a through conduit configuration so that the seat face of the valve is covered when the valve is in an open position, thus preventing impingement of abrasive fluid particles on the valve seat face during the open flow position of the valve. The activation means is connected to the valve gate through a floating connection which prevents lateral stress forces operating on the valve from being imparted to the solenoid. The floating connection also permits convenient removal of the valve seat and gate from an access opening on the exterior of the drill string housing to facilitate the replacement of critical valve parts without removing the valve subassembly from the drill string. The valve gate and seat have an oblong valve flow opening therein which provides for sufficient fluid flow to adequately modulate the fluid pressure and at the same time provide a minimum length of stroke for the solenoid to operate the valve. An upset rim on the valve seat provides a seating face smaller than the opposing seating face of the gate.
    • 公开了一种泥浆脉冲遥测系统,用于向在钻柱中循环的钻井液施加数据脉冲,包括用于调节循环钻井液的压力的改进的阀装置。 剪切式阀被布置成贯通导管结构,使得当阀处于打开位置时阀的阀座面被覆盖,从而防止了磨损流体颗粒在阀座表面的打开流动位置的撞击 阀。 激活装置通过浮动连接连接到阀门,该浮动连接防止作用在阀上的横向应力作用于螺线管。 浮动连接还允许从钻杆壳体的外部的进入开口方便地拆卸阀座和闸门,以便于更换临界阀部件而不从钻柱中移除阀子组件。 阀门和阀座在其中具有长方形阀流动开口,其中提供足够的流体流动以适当地调节流体压力,并且同时为螺线管提供操作阀的最小行程长度。 阀座上的镦粗边缘提供比门的相对的座面更小的座面。