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    DOWNHOLE CLOSED LOOP DRILLING SYSTEM WITH DEPTH MEASUREMENT
    12.
    发明公开
    DOWNHOLE CLOSED LOOP DRILLING SYSTEM WITH DEPTH MEASUREMENT 审中-公开
    博士研究生学位课程

    公开(公告)号：EP3055502A4

    公开(公告)日：2017-06-28

    申请号：EP14852473

    申请日：2014-10-06

    Applicant: BAKER HUGHES INC

    Inventor： KRUSPE THOMAS ,  ESTES ROBERT A ,  DIFOGGIO ROCCO ,  HANAK FRANCIS CHAD

    IPC: E21B47/04 ,  E21B7/04 ,  E21B44/00 ,  E21B47/09

    CPC classification number: E21B7/04 ,  E21B44/005 ,  E21B47/091

    Abstract: A method, system and drilling apparatus for directional drilling are disclosed. A drill bit is located at a downhole end of a drill string in a borehole. A length of the borehole between a surface location and the drill bit at the downhole end of a drill string is determined and an azimuth angle and inclination of the drill bit is obtained. The length of the borehole may be determined by recording an arrival time at a downhole location of an acoustic pulse travelling from a surface location to the downhole location and determines the travel time and borehole length therefrom. A downhole processor determines a position and orientation of the drill bit from the determined length, azimuth angle and inclination and alters a steering parameter of the drill bit using the determined position and orientation of the drill bit to obtain a selected trajectory for drilling the borehole.

    Abstract translation: 公开了一种定向钻井的方法，系统和钻井设备。 钻头位于钻孔中钻柱的井下端。 确定钻柱的井下端处的表面位置与钻头之间的钻孔的长度，并获得钻头的方位角和倾角。 钻孔的长度可以通过记录从表面位置行进到井下位置的声脉冲的井下位置处的到达时间并由此确定行进时间和钻孔长度来确定。 井下处理器根据所确定的长度，方位角和倾角来确定钻头的位置和取向，并且使用所确定的钻头的位置和取向来改变钻头的转向参数，以获得用于钻孔的选择的轨迹。

    DOWNHOLE COOLING WITH ELECTROCALORIC EFFECT
    20.
    发明公开
    DOWNHOLE COOLING WITH ELECTROCALORIC EFFECT 有权
    WITH影响ELEKTROKALORISCHER圆孔散热

    公开(公告)号：EP3014054A4

    公开(公告)日：2017-02-22

    申请号：EP14817959

    申请日：2014-06-24

    Applicant: BAKER HUGHES INC

    Inventor： DIFOGGIO ROCCO

    IPC: E21B36/00 ,  E21B47/01 ,  F25B21/00 ,  G01V11/00

    CPC classification number: E21B47/011 ,  G01V11/002

    Abstract: Methods, systems, devices, and products for taking a downhole measurement are presented. The method may include cooling a sensor in a borehole intersecting an earth formation using an electrocaloric material associated with the sensor, wherein the sensor is responsive to a downhole parameter. The method may further include applying an electric field to the electrocaloric material to generate a giant electrocaloric effect. The method may include selecting dimensions, composition, and Curie temperature of the electrocaloric material and characteristics of the electric field sufficient to reduce the nominal temperature of the sensor by at least 20 degrees Celsius, which may result in the sensor being proximate to a target temperature within the nominal operational temperature range of the sensor.

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