Which term describes a small-diameter pipe used during well sealing?

The term that describes a small-diameter pipe used during well sealing is "Tremie Pipe." This type of pipe is specifically designed for placing concrete or grout in a fluid form into the lower sections of a well or borehole, ensuring that the material is delivered accurately and without contamination. In well sealing, it plays a crucial role in preventing the movement of groundwater and providing a structural barrier.

The characteristics of a Tremie Pipe include its solid construction, which allows it to be submerged in the well, and its ability to deliver materials in a controlled manner while minimizing the mixing of different soil or water layers. Using this method helps achieve a proper seal around the well casing to protect groundwater quality.

Other terms, such as Conduit Pipe, Drain Pipe, and Injection Pipe, refer to different types of piping systems that serve other purposes. A Conduit Pipe is primarily used for housing electrical or communication cables, while a Drain Pipe is used for the removal of excess water or waste. An Injection Pipe is typically associated with injecting fluids into subsurface formations, such as for enhanced oil recovery or groundwater recharge, rather than sealing purposes.