Downhole water level detecting apparatus for detecting the level of water in a formation in the region of a well installation. The detecting apparatus includes a transmitter for applying electrical signals to a signaling loop at a first location. The signaling loop includes a downhole metallic structure of the well installation and an earth return. The detecting apparatus also includes a detector for monitoring electrical signals in the signaling loop, and an evaluation unit arranged for determining a level of water in the formation relative to the downhole metallic structure in dependence on the monitored signals.
申请公布号
US2014002088(A1)
申请公布日期
2014.01.02
申请号
US201113994295
申请日期
2011.12.08
申请人
HUDSON STEVEN MARTIN;BROMWICH ROBERT CHARLES;ROGACHEVA ALEXANDRA VASIL'EVNA;WESTON BRIDGET MARY;EXPRO NORTH SEA LIMITED
发明人
HUDSON STEVEN MARTIN;BROMWICH ROBERT CHARLES;ROGACHEVA ALEXANDRA VASIL'EVNA;WESTON BRIDGET MARY