Radioactive grease containing krypton 85
    3.
    发明授权
    Radioactive grease containing krypton 85 失效
    放射性润滑脂含有KRYPTON 85

    公开(公告)号:US3865736A

    公开(公告)日:1975-02-11

    申请号:US38693073

    申请日:1973-08-09

    申请人: CHEVRON RES

    发明人: FRIES BERNARD A

    摘要: A radioactive tracer system for indicating drill bit wear or failure utilizing radioactive krypton 85 dissolved or dispersed in an organic or metal organic thickened grease. Preferably the radioactive krypton is placed so that when drill bit wear or failure occurs, the radioactive krypton 85 is released and effectively becomes diffused in the circulating drilling fluid. At the surface, the radioactive krypton 85 gas is separated from the circulating drilling fluid by gas-mud separating means and is transported as a gas to a counting chamber where an accurate radioactivity count of beta rays released from the krypton is obtained. The beta rays indicate drill bit wear or failure when detected above the normal background radioactivity of the recirculating drilling fluid.

    摘要翻译: 一种放射性示踪剂系统,用于通过溶解或分散在有机或金属有机增稠润滑脂中的放射性氪85来指示钻头磨损或破坏。 优选地放置放射性氪,使得当钻头磨损或破坏发生时,放射性氪85被释放并且有效地在循环钻井液中扩散。 在表面上,放射性氪85气体通过气体 - 泥浆分离装置与循环钻井液分离,并作为气体输送到计数室,其中获得从氪释放的β射线的精确放射性计数。 β射线表示在循环钻井液的正常背景放射性之上时检测到钻头磨损或失效。