What is the term for a momentary increase in bottom hole pressure?

The term for a momentary increase in bottom hole pressure is known as surging. Surging refers to a rapid and brief spike in pressure that can occur during drilling operations, typically caused by sudden changes in fluid flow or movement within the wellbore. This spike in pressure can be critical to monitor, as it may indicate changes in the dynamics of the well, potentially affecting safety and control measures.

In the context of well control, understanding the concept of surging is essential because it helps operators recognize situations that might lead to more significant issues, such as kicks or even blowouts, if not managed promptly and effectively. Proper training and awareness of pressure behaviors in the wellbore, including surging, are crucial for maintaining well integrity and ensuring safe drilling practices.