How to Improve Borehole Stability in a Well Water System
A stable borehole, reinforced with suitable materials, prevents collapse of your well water system after drilling. It eliminates seepage of undesired minerals into drinking water. Follow the process below to improve the borehole stability of your well.
Step 1 - Drill the Borehole
Ensure the borehole penetrates the soil substrates to several feet below the water table. Your borehole should be supported by clay, silt, sand, and shale layers. It will reach into water-permeated sandstone for the best water quality and borehole perimeter integrity. Install a permeable screen at the bottom of your well where it penetrates the sandstone layer. Install a casing seal to align the permeable well screen in the sandstone with the main borehole.
Step 2 - Drill a Well Screen
Dig a second borehole as your well screen to the subsurface sand layer a few feet away from your primary borehole. It will help keep surface runoff from the main well. Install a perforated screen at the base of the well screen.
Step 3 - Reinforce the Borehole
Use polyvinyl chloride pipe (PVC) as casing for your well. Fasten sections with crimps and hold it rigidly in place with a coating of poured cement.