Horizontal Wells

Horizontal Remediation Wells use horizontal drilling technology to remediate contaminants in soils and groundwater.  It is usually a cheaper, more efficient, less intrusive and more sustainable (less energy, lower carbon footprint) alternative to excavation and landfilling.    Horizontal wells are effective with treatments such as air sparging, ISCO, stabilization, bioremediation,  thermal, dual-phase extraction and other in-situ technologies and lead to expedited site closures.  The table below gives a sample of the variety of sites closed by DTI using horizontal well technology. 

 

Contaminant	Site Type and Location	Technology	Regulatory Status
Petroleum	JFK Airport	HRW-Air Sparge	Closed
Petroleum	Tank Farm, Big Flats, NY	HRW –Air Sparge	Closed
TCE	Manufacturing Plant, Ashville, NC	HRW-SVE/Air Sparge	Closed
TCE	Beneath Building,  MA	HRW-Air Sparge	Closed
Transformer Oil	Industrial Area, MA	HRW-Air Sparge	Closed
Jet Fuel	Air Force Base, NY	HRW-Air Sparge	Closed
PCE	Dry Cleaner, MD	HRW-Blind Injection Wells	Closed
Gasoline	Submarine Base, CT	HRW-SVE	Closed
Arsenic	Factory Site, NJ	French Drain	Closed
PCE	Dry Cleaner, VA	HRW-SVE	Closed
Gasoline	Gas Station, FL	HRW-Air Sparging	Closed
Diesel	Private Residence, CT	Liquid Ring Extraction	Closed
Chlorinated Solvents	Chemical Plant, NJ	HRW-Air Sparge	Closed
Transformer Oil	Transformer Station, CT	HRW-SVE	Closed

Horizontal drilling technology is a proven technology that has been used in the oil fields for years.  The advantages of horizontal wells for subsurface injection parallel to the  are manifold: (1)  Horizontal wells permit better contact of the remediation treatment than verticals wells, (2) there is a large zone of influence created by horiozntal wells and (3) there are cost savings.

DTI also has to opportunity to deliver such treatments as surfactants, oxidants, and nanoparticles such as zerovalent iron (ZVI) thru horizontal wells.