During casing cut and pull operations for a major Norwegian operator, the initial challenge was to displace fluid in the well with oil-based mud without activating the casing cutting elements. Once fluid displacement was completed, the cutting elements for the 9 5/8” casing cut could be immediately activated without having an extra trip.
DSI supplied a 6 ¾” PBL Multiple Activation Bypass Tool, which was positioned in the BHA above the casing cutting elements. A PBL activation ball was placed ‘on-seat’ prior to RIH, allowing for 100% fluid bypass and displacement as soon as the rig pumps started, thus preventing any opening of the cutting elements until required. When activated, the PBL tool allowed complete displacement of the fluid system, with high flow rates minimizing circulating time.