Pollard Wireline Safety & Quality Portal

Training and cross-check aid. The rig's IADC / IWCF kill sheet, filled in and verified by the driller and toolpusher, governs.

Original mud weight (ppg)SIDPP (psi)TVD (ft)Slow circulating rate pressure (psi)Surface to bit volume (bbl)Pump output (bbl/stk)

Formula: KMW = SIDPP / (0.052 * TVD) + OMW; ICP = SCR + SIDPP; FCP = SCR * KMW / OMW; linear ICP to FCP over surface-to-bit strokes

Source: IWCF Drilling Well Control Formula Sheet (Surface and Subsea, Levels 2 to 4); API RP 59, Recommended Practice for Well Control Operations

Methods

Wait and weight: one circulation with kill mud; follow the schedule above until kill mud reaches the bit, then hold FCP.
Driller's method: circulation 1 with original mud holding ICP constant (SCR + SIDPP) to remove the influx; circulation 2 with kill mud using the same schedule.
Bring the pump up to kill rate holding casing pressure constant (API RP 59).