Comments on: Proactively using annular friction can enable safer, more efficient well control /proactively-using-annular-friction-can-enable-safer-efficient-well-control-40711 Get the latest oil drilling news with Èý•NÌåÓý Tue, 14 Feb 2017 21:47:46 +0000 hourly 1 https://wordpress.org/?v=6.1.1