Extendable element systems for downhole tools

    公开(公告)号:US10801274B2

    公开(公告)日:2020-10-13

    申请号:US15270032

    申请日:2016-09-20

    IPC分类号: E21B17/10 E21B47/12 E21B4/18

    摘要: Extendable elements of downhole tools are provided having an extension direction component perpendicular to a tool axis, wherein a force is applied to the extendable element when in operation. The extendable elements comprise a first cross-section that includes the extension direction component, a first surface configured to receive a first force component of the force, the first force component substantially perpendicular to the first surface and a second surface configured to transfer at least a portion of the first force component of the force to a body of the downhole tool. The second surface and the extension direction component perpendicular to the tool axis draw a first angle that is between 0° and 90°.

    EXTENDABLE ELEMENT SYSTEMS FOR DOWNHOLE TOOLS

    公开(公告)号:US20180080297A1

    公开(公告)日:2018-03-22

    申请号:US15270032

    申请日:2016-09-20

    摘要: Extendable elements of downhole tools are provided having an extension direction component perpendicular to a tool axis, wherein a force is applied to the extendable element when in operation. The extendable elements comprise a first cross-section that includes the extension direction component, a first surface configured to receive a first force component of the force, the first force component substantially perpendicular to the first surface and a second surface configured to transfer at least a portion of the first force component of the force to a body of the downhole tool. The second surface and the extension direction component perpendicular to the tool axis draw a first angle that is between 0° and 90°.

    Flow restriction device with variable space for use in wellbores

    公开(公告)号:US10246995B2

    公开(公告)日:2019-04-02

    申请号:US15389019

    申请日:2016-12-22

    IPC分类号: E21B47/18 E21B34/08

    摘要: An apparatus for use in a wellbore is disclosed that in one non-limiting embodiment includes a flow restriction device that that contains a channeling element having a fluid flow passage, a restriction element spaced from the channeling element defining a gap between the restriction element and the channeling element, wherein relative movement between the restriction element and the channeling element obstructs flow of a fluid flowing through the flow passage to increase pressure in the fluid across the device. In one embodiment an activation device displaces one of the channeling element and the restriction element to adjusts or alter gap in response to certain changes in the pressure across the restriction device.

    OSCILLATING SHEAR VALVE FOR MUD PULSE TELEMETRY
    8.
    发明申请
    OSCILLATING SHEAR VALVE FOR MUD PULSE TELEMETRY 有权
    用于MUD脉冲电视的振动切割阀

    公开(公告)号:US20080068929A1

    公开(公告)日:2008-03-20

    申请号:US11869544

    申请日:2007-10-09

    IPC分类号: H04H60/00

    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。

    FLOW RESTRICTION DEVICE WITH VARIABLE SPACE FOR USE IN WELLBORES

    公开(公告)号:US20180179890A1

    公开(公告)日:2018-06-28

    申请号:US15389019

    申请日:2016-12-22

    IPC分类号: E21B47/18 E21B34/08

    CPC分类号: E21B47/187 E21B34/08

    摘要: An apparatus for use in a wellbore is disclosed that in one non-limiting embodiment includes a flow restriction device that that contains a channeling element having a fluid flow passage, a restriction element spaced from the channeling element defining a gap between the restriction element and the channeling element, wherein relative movement between the restriction element and the channeling element obstructs flow of a fluid flowing through the flow passage to increase pressure in the fluid across the device. In one embodiment an activation device displaces one of the channeling element and the restriction element to adjusts or alter gap in response to certain changes in the pressure across the restriction device.