If swabbing is apparent, what should be done according to best practices?

When swabbing is detected, the best practice involves running back to the bottom, circulating bottoms up, and considering pumping out of the hole. This approach is essential because swabbing can lead to a reduction in hydrostatic pressure within the wellbore, which may allow formation fluids to enter the well. By circulating the mud, you help to stabilize the wellbore and manage the pressure more effectively.

Running back to the bottom ensures that you are in a controlled position to monitor the well conditions and manage any potential influx of formation fluids. Circulating bottoms up not only helps to re-establish well control but also allows you to assess the condition of the wellbore and the integrity of the drilling fluid. If a significant influx is detected or if there are concerns about well stability, pumping out of the hole can help manage the situation further, ensuring that formation pressures do not compromise safety or operational integrity.

This strategic response mitigates risks and ensures that the drilling operation can continue safely and effectively, maintaining well control under swabbing conditions.