The 5-in. Booster Tool was picked up and run into the hole on a rotary BHA. Upon reaching the bottom at a depth of 5900m TVD, an opening ball was dropped from the surface. A constant flow rate was maintained, and when the ball landed on the ball seat within the Booster Tool, a pressure response was observed. Following best operational practices, the flow rate was kept constant throughout the procedure, as indicated by the blue flow rate track.
The red track indicates the ball landing on the seat, followed by an increase in SPP. As the pressure rises, the spring begins to compress, causing the indexing mechanism to shift position. When the SPP reaches its peak (the shear pressure of the ball), the ball passes into the ball catcher below, and the tool locks open in Split Flow drilling mode. The visible reduction in the SPP plot indicates a lower reading at the same flow rate. This reduction confirms that the tool is open and Split Flow is activated, resulting in a larger TFA within the system.
Following the opening procedure, drilling resumed at a rate of penetration (ROP) of 1m/h This continued for a total of 113 hours, during which 46m was drilled to reach a depth of 6000m. Eventually, the BHA was pulled out due to the low ROP.