Safe, Timely & Quality Drilling in the Mid-Atlantic Since 1991

Our Services

Geotechnical and Environmental

Precisely collecting data without distorting results using our extensive knowledge of local geology.

Water Well & Geothermal

Water well, Geothermal well drilling, & loop installation with ground-loop connection.

Well Pump Services

Residential water well and pump services and repairs.


Use of high-frequency, resonant energy generated inside the sonic head to advance a core barrel or casing into subsurface formations

Why Choose Connelly?


Industry leaders since 1991


Combined total experience of 100+ years

Service Area

Service area extends beyond Maryland and Virginia to include West Virginia, Pennsylvania, Delaware and Washington, D.C.