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    • 8. 发明申请
    • DOWNHOLE TOOL FOR DETERMINING THE TUINNEL DEPTH OF PERFORATION TUNNELS
    • 用于确定管道隧道深度的井下工具
    • WO2009133375A3
    • 2011-08-18
    • PCT/GB2009001108
    • 2009-05-01
    • ADVANCED PERFORATING TECHNOLOGIES LTDATHERTON ERICJONES TIM
    • ATHERTON ERICJONES TIM
    • E21B43/119E21B47/08E21B47/09G01B21/18
    • E21B43/11E21B43/119E21B47/08E21B47/09E21B49/00G01B5/18
    • A means of investigating the quality and/or nature of perforations in a downhole environment is disclosed. A "pecking1 finger (4) and depth measuring probe (40A) that can be axially and radially displaced enables the perforation to be located and its depth determined, through sequentially pecking around the wall lining in patterns such as radial, axial, and spiral sequences. By swinging a pecking finger that supports a depth measuring probe or cable with a bullet or conically shaped tip and measuring the displacement of the finger, the edge and centre of the hole can be determined with the largest displacement being when the tip is fully in the hole. When this position has been determined, the depth measuring cable is deployed and the depth of the perforation can be established by both an increase in the force required to push the cable and by the displacement of the pecking finger as it is pushed back by the reaction forces on the cable. Thus, a downhole tool comprises a elongate housing for insertion into a downhole environment, from which a probe extends radially by a variable amount, means for driving the probe in a radial direction, and means for sensing resistance to outward radial movement of the probe.
    • 公开了一种调查井下环境中穿孔质量和/或性质的方法。 可以轴向和径向移位的“啄食1手指(4)和深度测量探针(40A)使得能够定位穿孔并且通过依次以诸如径向,轴向和螺旋序列的图案啄围壁衬垫来确定其深度 通过摆动支撑深度测量探针或电缆的啄食手指,其具有子弹或圆锥形尖端并测量手指的位移,可以确定孔的边缘和中心,当尖端完全处于最大位移时 当确定该位置时,展开深度测量电缆,并且可以通过推动电缆所需的力的增加和被推回的啄食手指的位移两者来建立穿孔的深度 因此,井下工具包括用于插入井下环境的细长壳体,探头从该井下径向径向延伸可变量,我 用于沿径向方向驱动探头,以及用于感测对探针向外径向运动的阻力的装置。