公开(公告)号：US5763773A

公开(公告)日：1998-06-09

申请号：US706143

申请日：1996-09-20

申请人： James Robert Birchak ,  James Wayne Stroud ,  Batakrishna Mandal ,  John Wesley Minear

发明人： James Robert Birchak ,  James Wayne Stroud ,  Batakrishna Mandal ,  John Wesley Minear

IPC分类号： E21B47/00 ,  E21B47/01 ,  G01V1/44 ,  G01V1/52 ,  G01V1/46

CPC分类号： G01V1/44 ,  E21B47/0005 ,  E21B47/01

摘要： A multi-part logging tool that allows measurement of several distinct independent parameters, which are in turn used to solve for secondary parameters that give information about the properties of the cement outside the casing. Secondary parameters affecting the measured signals are: casing thickness, bond of cement to casing, cement acoustic impedance, cement thickness, channel size and channel material. The present invention comprises a rotating tool that supports a plurality of specifically configured transducers that interrogate a region behind casing having a 10 degree azimuthal resolution and a depth of investigation of at least 0.75 inches behind casing. The transducers on the rotating tool include an array of angled beam transducers, a single-housing pitch-catch transducer and a radial, pulse echo transducer.

摘要翻译： 一种多部分测井工具，可以测量几个不同的独立参数，这些参数又用于解决二次参数，从而提供有关壳体外部水泥属性的信息。 影响测量信号的二次参数是：套管厚度，水泥与套管的粘结，水泥声阻抗，水泥厚度，通道尺寸和通道材料。 本发明包括旋转工具，其支撑多个具体构造的换能器，其询问壳体后方的区域，其具有10度方位角分辨率和在套管后方至少0.75英寸的调查深度。 旋转工具上的传感器包括倾斜光束传感器阵列，单壳体俯仰捕获传感器和径向脉冲回波传感器。