专利名称:RESTORABLE ANNTENNAE APPARATUS AND SYSTEM FOR WELL LOGGING专利申请号:EP20180182195申请日:2014.03.11公开号:EP3404451(B1)公开日:2020.01.22申请人:China National Petroleum Corporation;Oliden Technology,LLC An apparatus includes a sub with recesses along an exterior wall to receive inserts,an antennae case including a coil surrounded by a sacrificial wear portion of a material through which signals between the coil and a formation of interest may pass.An eroded outer wall of the sacrificial wear portion is restorable by application of an uncured restorative material to the antennae case.A method includes securing an antennae case having a coil there within onto a sub,surrounding the coil with a metal sleeve shield,and radially receiving and securing a multi-piece sacrificial wear member intermediate the antennae case and a retainer ring having a threaded bore.The multi-piece sacrificial wear member is replaceable after use by unthreading the retainer ring to release the sacrificial wear member for radial removal from the sub.
展开▼
