Bore Rehabilitation

Bore Rehabilitation:

A badly built bore may work effectively for months or even years, but it will ultimately break down. Unscrupulous drillers frequently create bores at a low cost. They achieve this in a variety of methods, including not putting enough casing in the bore and not developing the hole sufficiently.

Bores can become damaged and inefficient over time from;

  • biofouling iron bacteria
  • rusting of casings and screens
  • physical blockers of pumps and bore holes

Poor building methods, hostile water quality, geological problems, or changing hydrogeological variables can all lead to the need for bore rehabilitation.

Bore Rehabilitation can fix these problems by jetting screens and casing with air compressors and high-pressure water to redevelop the permeability of sands around the screens.

A bore built in clay and sand formations will need to be re-developed from time to time to remove inward migrating of small particles, which will lower the bore’s yield and shorten the pump’s life.

 

 

bore rehabilitation
Fig A. “Scrubbing Run” brushing tool that is run down the casing to clean deposits and scaling off walls of hole and screens. Fig B:Jetting tool, for jetting the screens at high pressure with water, air or chemical fluids.