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1. 发明授权

US06710600B1 Drillpipe structures to accommodate downhole testing 失效
标题翻译：钻杆结构，以适应井下测试
公开(公告)号：US06710600B1
公开(公告)日：2004-03-23
申请号：US09080413
申请日：1998-05-18
申请人： Denis S. Kopecki , MacMillian M. Wisler , Hendrik John
发明人： Denis S. Kopecki , MacMillian M. Wisler , Hendrik John
IPC分类号： G01V300
CPC分类号： E21B47/01 , G01V3/30
摘要： A drill collar structure to facilitate measurement-while-drilling (MWD) techniques while at the same time having sufficient rigidity to facilitate the drilling operation is disclosed. In some embodiments, a metal structure involving openings such as slots, preferably oriented longitudinally along its axis, but also in other configurations, are disclosed to allow sufficient strength while at the same time allowing exit and entrance of electromagnetic energy. A composite structure is also disclosed which, for given layers, has adjacent fibers such as glass and carbon, so that when the layers are overlapped, glass areas overlap glass areas throughout the radial thickness of the composite tube to create “windows” for the entrance and exit of electromagnetic energy. In yet other embodiments, the drill collar can be made of a metallic frame structure with a multiplicity of openings which are filled with a composite material. The metallic frame structure provides structural rigidity while the openings, filled with composite material which are attached to the metal structure, form a fluid-tight cohesive structure sufficient to withstand the rigors of drilling, while at the same time allow the measurements of the formation to be taken through the windows or by making use of sensors embedded in the windows. In another alternative composite structure, carbon fibers can be used if they are electrically insulated in the areas where electromagnetic energy is to enter and exit the structure. Another composite alternative is to alternate carbon and glass fibers in particular sequences or to use insulated carbon fibers to facilitate the operation of instruments which can be mounted in the structure whose operation could be negatively affected by conductivity in the wall in an azimuthal direction.
摘要翻译：公开了一种钻铤结构，以便于同时进行钻井测量（MWD）技术，同时具有足够的刚度以便于钻井操作。在一些实施例中，公开了一种涉及诸如槽之类的开口的金属结构，优选地沿其轴线纵向定向，而且在其它构造中，允许足够的强度同时允许电磁能的出入和入口。还公开了一种复合结构，对于给定层，其具有相邻的纤维如玻璃和碳，使得当层重叠时，玻璃区域在整个复合管的整个径向厚度上与玻璃区域重叠以形成入口的“窗口” 并退出电磁能。在其他实施例中，钻铤可以由具有多个开口的金属框架结构制成，其中填充有复合材料。金属框架结构提供了结构刚性，而填充有复合材料的开口连接到金属结构上形成足够的流体密封的内聚结构，足以承受钻井的严格性，同时允许测量地层通过窗户或使用嵌入在窗户中的传感器。在另一种替代的复合结构中，如果碳纤维在电磁能进入和离开结构的区域中是电绝缘的，则可以使用碳纤维。另一种复合替代方案是以特定顺序交替使用碳纤维和玻璃纤维，或者使用绝缘碳纤维来促进仪器的操作，这些仪器可以安装在结构中，其操作可能受到方位角方向上的壁中的导电性的不利影响。

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