WATER WELL SERVICES
DIAGRAM OF WATER WELL
NEED FOR WATER WELL REQUIREMENTS
WATER WELL PRINCIPLES
REQUIREMENTS & RESPONSIBILITIES
BORE DESIGN & TYPES
CLASSIFICATION SYSTEM & DRILLING METHODS
SITING A WATER SUPPLY BORE
Good Industry Practice
– Water Well Casing –
As a general guide the diameter of the bore casing for high-yield bores
shall be approximately 50 mm larger than the pump size specified for the bore.
Drillers should always case a bore to such a depth that no part of the pump or
column is exposed to open-hole conditions.
A casing of inert material should be used in all areas where a
corrosive problem from bore water or strata is known to exist.
When securing the joint the internal diameter of the casing
should not be compromised, for example, by screws, rivets, or welding.
Multi-port monitoring bores must be cased and grout sealed
over the total depth of the hole.
Access to the monitoring zone is through the perforation of
the casing and grout seal.