Question

Materials and apparatus required for the activity of well , lake​

Answer 1

Answer:

Explanation:

Drilled wells. Drilled wells are constructed by either cable tool (percussion) or rotary-drilling machines. Drilled wells that penetrate unconsolidated material require installation of casing and a screen to prevent inflow of sediment and collapse. They can be drilled more than 1,000 feet deep. The space around the casing must be sealed with grouting material of either neat cement or bentonite clay to prevent contamination by water draining from the surface downward around the outside of the casing.

View videos of the most common well drilling methods: air rotary, bucket auger, cable tool, down-the-hole, and reverse circulation. Videos are courtesy of Sir Sanford Fleming College.