Milling Guidelines
To effectively remove the cuttings while milling stuck pipe, it shall be ensured that:
- the yield point of the mud is increased as high as possible prior to commencing milling, taking advice from the fluids engineer.
- the flow is turbulent to prevent cuttings from blocking the annulus, (a minimum annular velocity of 115 ft/min is recommended at BOP’s riser)
Rotation shall start a minimum 1 ft above the fish. WOB and rpm shall be adjusted to find the best milling rate while noting the rotating . . .