A decline in well performance can often be counteracted by appropriate well cleaning and rehabilitation procedures.
Collect Quarterly Data
Well owners should evaluate well and pump performance on an on-going basis.
Data to be collected should include static water level, pumping water level, flow rate, discharge pressure, sand production, and energy consumption. Data should be collected in a consistent manner at specified periods of time (usually monthly or quarterly). A significant change in operating conditions indicates that a problem may exist.
Once your problem is identified
Once a problem has been identified, the potential sources of the problem should be evaluated. The operation history of the well should be reviewed along with the results of any previous treatment efforts. The existing data may need to be supplemented by conducting performance tests to determine the current condition of the well and pump. If it is necessary to remove the well pump, a down hole video survey should also be performed. A proper treatment procedure should then be developed to address the specific well problems.
Implementation of rehabilitation procedures for an individual well should generally include some or all of the following steps:
- Pull and inspect the pump
- Perform a video survey,
- Perform mechanical cleaning of the well screen,
- Apply the proper quantity and type of chemical treatments,
- Allow sufficient chemical reaction time,
- Remove spent chemicals from the well,
- Reinstall the well pump, and
- Conduct a performance pumping test.