Short-range exchange coupling in the AFM/FM bilayers with a spacer layer;
具有分隔层Bi的反铁磁/铁磁双层薄膜间的短程交换耦合
Expounded existing CBM well testing problems of conventional single layer isolation packer used after completion of multiple coal seam wells,introduced structure,operation technology,and successful data of injection/pressure drop and in situ stress test of layered isolation packer used in multiple coal seam well completion.
阐述了常规测试使用的单层封隔器在多煤层完井的煤层气井测试中存在的问题,介绍了应用于多煤层完井的煤层气井测试中分层隔离封隔器的结构、施工工艺,及其注入/压降及原地应力测试的成功资料,解决了以往单封隔器无法在这类型煤层气井中准确获取目的煤层的各样参数的现场施工问题。