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    Systems, devices and methods for borehole gravimetry
    2.
    发明授权
    Systems, devices and methods for borehole gravimetry 有权

    公开(公告)号：US09939551B2

    公开(公告)日：2018-04-10

    申请号：US13966111

    申请日：2013-08-13

    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

    Inventor： Benjamin Levitt ,  Martin E. Poitzsch ,  Bradley Albert Roscoe

    IPC: G01D5/30 ,  G01V7/04 ,  E21B47/00 ,  G01V7/00 ,  G01H9/00

    CPC classification number: G01V7/00 ,  E21B47/00 ,  G01D5/30 ,  G01H9/00 ,  G01V7/04

    Abstract: A gravimeter, a gravimeter system, and a method for measuring gravitational acceleration within a borehole are described herein. The gravimeter includes a proof mass that is constrained by springs and an optical interferometer for measuring displacement of the proof mass. The optical interferometer generates a light path from a light source to a reflective surface on the proof mass. Spatial displacement of the proof mass from a reference position to a position of gravitational equilibrium is determined by measuring a change in length of the light path. In turn, gravitational acceleration can be determined from the spatial displacement of the proof mass. A number of such gravimeters can be used in a gravimeter system to make measurements of gravitational acceleration in variety of different directions.

    Drill bit systems with temperature sensors and applications using temperature sensor measurements
    4.
    发明授权
    Drill bit systems with temperature sensors and applications using temperature sensor measurements 有权
    具有温度传感器和应用的钻头系统使用温度传感器测量

    公开(公告)号：US09297251B2

    公开(公告)日：2016-03-29

    申请号：US13771329

    申请日：2013-02-20

    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

    Inventor： Martin E. Poitzsch

    IPC: E21B12/00 ,  E21B47/06 ,  E21B10/00

    CPC classification number: E21B47/065 ,  E21B10/00

    Abstract: A drill bit includes a plurality of blades. The blades provide a plurality of cutting elements or teeth arranged on a leading face of the blade. At least one temperature sensor is provided adjacent at least one of the teeth of at least one blade to sense a local temperature of the blade adjacent that tooth. Multiple temperature sensors may be provided adjacent different teeth of a blade or adjacent the teeth of at least two blades, or adjacent multiple teeth of multiple blades. Another temperature sensing element may be provided on a proximal portion of the blade distant from the cutting elements or on the shank of the bit to provide a reference temperature for the drill bit or for the blade. Information obtained by the temperature sensing elements is used to provide information regarding at least one of the drill bit, the drilling environment and the formation.

    Abstract translation: 钻头包括多个叶片。 叶片提供了布置在叶片的前表面上的多个切割元件或齿。 至少一个温度传感器设置在至少一个叶片的至少一个齿周围，以感测与该齿相邻的叶片的局部温度。 多个温度传感器可以设置在叶片的不同齿附近或邻近至少两个叶片的齿或邻近多个叶片的多个齿之间。 可以在叶片的远离切割元件或钻头的柄部的近端部分上提供另一温度感测元件，以提供用于钻头或刀片的参考温度。 由温度感测元件获得的信息用于提供关于钻头，钻井环境和地层中的至少一个的信息。

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