(405 mm). The self-fill valve mechanism here comprises an aluminium plate 60 embedded within the cement shoe. Above the aluminium plate 60 there is a cylindrical PVC pipe 62, and below the aluminium plate a lar
Figure 4.Diagram of the drilling fluid flow simulator. (1) Pump with a centrifugal impeller; (2) tank with drilling fluid; (3) electric motor; (4) drive belt; (5) polyvinyl chloride (PVC) pipe; (6) core holder; (7) drilling fluid supply pipe; (8) tripod. ...