What type of pipe is used to apply grout when sealing a well?

The tremie pipe is specifically designed to facilitate the placement of grout in applications such as sealing a well. Its unique construction allows for the controlled flow of materials, ensuring that the grout can be delivered to the desired depth without premature setting or contamination. The design of the tremie pipe typically includes a closed bottom and an open top, which prevents air from entering the flow of grout and minimizes the risk of voids or air pockets during placement. This makes it particularly effective in underwater environments or in scenarios where precision is crucial, such as well sealing operations.

In contrast, rigid pipes may not provide the necessary flexibility or flow control for grouting applications, and flexible pipes, while adaptable, may not have the structural stability required to ensure the grout reaches the intended depth without collapsing. The term "grout pipe" is occasionally used informally, but it does not specifically denote the technical design and application properties that a tremie pipe embodies, making it less suitable in the context of well sealing.