What is the main purpose of casing in a well?

The primary purpose of casing in a well is to protect the wellbore and maintain its structure. Casing is a series of steel pipes that are inserted into the well after drilling. This helps to stabilize the wellbore, preventing collapse and protecting the surrounding formations from contamination during drilling and production activities. Additionally, casing serves to isolate different pressure zones and secure the well against the influx of fluids from surrounding rock formations.

Casing also plays a crucial role in maintaining the integrity of the well over time, allowing for safe production and minimization of environmental impact. By ensuring that the wellbore remains structurally sound, casing helps to facilitate efficient extraction of resources while protecting both the workers involved and the surrounding ecosystem from potential hazards.