首页>
外国专利>
Device for transmitting on the surface the signals of a transmitter located at great depth.
Device for transmitting on the surface the signals of a transmitter located at great depth.
展开▼
机译:用于在表面上传输深度较大的发射机信号的设备。
展开▼
页面导航
摘要
著录项
相似文献
摘要
A device for transmitting signals from a transmitter at the bottom of a drill well to the earth's surface including a drill collar which extends in an axial direction, a transmitter disposed in the drill collar, a cylindrical metal sleeve from forming part of an antenna for electromagnetic wave transmission, the cylindrical metal sleeve being disposed around the drill collar and connected electrically to the transmitter, the cylindrical metal sleeve having a diameter greater than the diameter of the drill collar and having an axial length shorter than the axial length of the drill collar, and an insulating sheath disposed between the cylindrical metal sleeve and the drill collar, the insulating sheath having an axial length shorter than the axial length of the drill collar.
展开▼