What is meant by the term annular space?

The term "annular space" refers to the area between the well casing and the well bore. This is a critical space in well construction and monitoring, as it plays a significant role in the overall integrity and safety of the well. In particular, the annular space is important for the installation of sealing materials, such as grout, which prevent contaminants from entering the water supply. It also provides a means for monitoring the well's conditions and can accommodate pressure monitoring or other instrumentation.

Understanding the annular space is essential for water well technicians because it influences groundwater flow and the interaction between geological layers. Proper management and monitoring of this area can help ensure the long-term sustainability and safety of the water supply sourced from the well.