To minimize the risk of stuck pipe during a Leak-Off Test (LOT), what should be done?

To minimize the risk of stuck pipe during a Leak-Off Test (LOT), raising the bit up inside the shoe is particularly effective. When you perform an LOT, it is critical to ensure that the pressure applied does not exceed the formation pressure. If the bit is too deep and in contact with the formation, it may create a situation where the hydrostatic pressure from the fluid column can cause the bit to become stuck against the formation due to over-pressurization or other mechanical constraints.

By raising the bit inside the shoe, you are reducing potential contact with the formation. This action helps in aligning the annulus with the flow path and enables the wellbore pressure to be more effectively monitored and managed during the test. It also allows for better pressure release and can prevent any additional forces that may contribute to the bit becoming stuck.

The other options may contribute risk factors that can be detrimental during the Leak-Off Test process. Lowering the bit deeper can struggle with hydrostatic pressure, increasing mud density can result in excessive pressure on the formation, and decreasing the circulation rate may not effectively manage the pressure and could also lead to complications such as cuttings settling, which can contribute to stuck pipe conditions.