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1.发明授权Method of recovering data acquired and stored down a well, by an acoustic path, and apparatus for implementing the method 失效通过声学路径恢复获取并存储在井中的数据的方法以及用于实现该方法的装置
公开(公告)号：US5914911A
公开(公告)日：1999-06-22
申请号：US740942
申请日：1996-11-05
CPC分类号： E21B47/121 , E21B47/124 , E21B47/16
摘要： In a well (10) in production or undergoing tests, the recovery of data acquired and stored in a downhole unit (16) located in the lower part of a drillpipe string (12) below a test valve (20) is effected directly in the form of acoustic signals between the downhole unit (16) and an interface tool (24). To this end, acoustic coupling is established between the tool (24) and the drillpipe string (12), and electro-acoustic transducers are provided in the tool and in the downhole unit (16). Commands are transmitted in the opposite direction, also in the form of acoustic signals, in particular to initiate data recovery. The transmission of data and commands between the tool (24) and the surface unit (22) is effected by any known means, for example in the form of electrical signals carried by a cable (26).
摘要翻译： 在生产或经历测试的井（10）中，在位于测试阀（20）下方的钻杆柱（12）的下部的井下单元（16）中获取和存储的数据的恢复直接在 在井下单元（16）和接口工具（24）之间的声信号的形式。 为此，在工具（24）和钻杆串（12）之间建立声耦合，并且电声换能器设置在工具和井下单元（16）中。 命令以相反的方向传输，也以声信号的形式发送，特别是启动数据恢复。 数据和命令在工具（24）和表面单元（22）之间的传输通过任何已知的方式实现，例如以电缆（26）承载的电信号的形式。
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2.发明授权
公开(公告)号：US4896303A
公开(公告)日：1990-01-23
申请号：US273120
申请日：1988-11-17
CPC分类号： G01N29/4472 , E21B47/0005 , G01N29/11 , G01N29/52 , G01V1/50
摘要： Acoustical coupling is proposed as a means of determining the presence and acoustical impedance of materials behind casing in cementation evaluation. Expressions for computing coupling and attenuation in multi-receiver/transmitter logging systems are analyzed in an exponential model for the spatial decay of elastic wave energy propagating axially along the casing. Amplitude change between transmitter(s) and receiver(s) is separated into a change dependent on coupling into and out of the casing wave, as well as a change related to attenuation along the casing. Coupling which is dependent on geometrical factors such as casing size and thickness, and on distribution and mechanical properties of the material outside the casing, shows principally the mechanical impedance of the material outside. Significantly, the bonding of this material to the casing is not a dominant factor for the coupling. Thus an estimation of cement strength may be made even in the presence of microannulus.
摘要翻译： 提出了声耦合作为确定胶结评估中套管背后材料的存在和声阻抗的手段。 用于计算多接收机/发射机测井系统中的耦合和衰减的表达式在沿着壳体轴向传播的弹性波能的空间衰减的指数模型中进行分析。 发射机和接收机之间的振幅变化被分离为取决于耦合进入和离开壳体波的变化，以及与壳体的衰减有关的变化。 取决于外壳尺寸和厚度等几何因素的耦合以及外壳材料的分布和机械性能，主要表现为外部材料的机械阻抗。 重要的是，该材料与壳体的结合不是耦合的主要因素。 因此，即使在存在微环境的情况下也可以进行水泥强度的估计。
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3.发明授权Subsurface radiation phenomena detection with combined and azimuthally sensitive detectors 有权使用组合和方位角敏感探测器的地下辐射现象检测公开(公告)号：US06781115B2
公开(公告)日：2004-08-24
申请号：US10091251
申请日：2002-03-05
申请人： Christian Stoller , Xavier Herve , Sunil N. Gulrajani , Peter Wraight , Verna L. Lomax , Dennis J. Pittman , Jean-Pierre Poyet
发明人： Christian Stoller , Xavier Herve , Sunil N. Gulrajani , Peter Wraight , Verna L. Lomax , Dennis J. Pittman , Jean-Pierre Poyet
IPC分类号： G01V504
摘要： A system and method are disclosed for detecting radiation phenomena in an area surrounding a wellbore traversing an earth formation. A logging instrument is equipped with combined radiation detectors to provide multiple measurements at the same axial position along the instrument axis, without the use of rotating parts within the instrument. Shielded or segmented detectors provide azimuthally focused detector sensitivity. A controllable radiation source is optionally disposed on the instrument for subsurface irradiation. Also disclosed is the use of radioactive materials in unison with the logging instrument to determine subsurface flow and reservoir characteristics.
摘要翻译： 公开了一种用于检测穿过地层的井身周围区域中的辐射现象的系统和方法。 测井仪器配备有组合式辐射探测器，可在仪器轴线的同一轴向位置提供多次测量，而无需使用仪器内的旋转部件。 屏蔽或分段检测器提供方位角聚焦检测器灵敏度。 可控辐射源可选地设置在仪器上用于地下照射。 还公开了使用放射性材料与测井仪器一致以确定地下水流和储层特性。
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