Earth Drillers, Except Oil and Gas

Fabricate well casings.

Operate controls to stabilize machines and to position and align drills.

Pour water into wells, or pump water or slush into wells to cool drill bits and to remove drillings.

Start, stop, and control drilling speed of machines and insertion of casings into holes.

Regulate air pressure, rotary speed, and downward pressure, according to the type of rock or concrete being drilled.

Select and attach drill bits and drill rods, adding more rods as hole depths increase, and changing drill bits as needed.

Drive or guide truck-mounted equipment into position, level and stabilize rigs, and extend telescoping derricks.

Create and lay out designs for drill and blast patterns.

Operate machines to flush earth cuttings or to blow dust from holes.

Monitor drilling operations, checking gauges and listening to equipment to assess drilling conditions and to determine the need to adjust drilling or alter equipment.

Place and install screens, casings, pumps, and other well fixtures to develop wells.

Verify depths and alignments of boring positions.

Perform routine maintenance and upgrade work on machines and equipment, such as replacing parts, building up drill bits, and lubricating machinery.

Select the appropriate drill for the job, using knowledge of rock or soil conditions.

Document geological formations encountered during work.

Operate water-well drilling rigs and other equipment to drill, bore, and dig for water wells or for environmental assessment purposes.

Drive trucks, tractors, or truck-mounted drills to and from work sites.

Assemble and position machines, augers, casing pipes, and other equipment, using hand and power tools.

Record drilling progress and geological data.

Retrieve lost equipment from bore holes, using retrieval tools and equipment.

Review client requirements and proposed locations for drilling operations to determine feasibility, and to determine cost estimates.

Drill or bore holes in rock for blasting, grouting, anchoring, or building foundations.

Perform pumping tests to assess well performance.

Disinfect, reconstruct, and redevelop contaminated wells and water pumping systems, and clean and disinfect new wells in preparation for use.

Design well pumping systems.

Signal crane operators to move equipment.

Withdraw drill rods from holes, and extract core samples.

Inspect core samples to determine nature of strata, or take samples to laboratories for analysis.

Retract augers to force discharge dirt from holes.

Observe electronic graph recorders and flow meters that monitor the water used to flush debris from holes.