An Innovative Air-Rotary Drilling Technology That Lets You Drill Right Through Caving Overburden

Presented on Tuesday, December 4, 2012

Many bedrock formations that have weathered and decomposed over millennia today have a thick overburden composed of sand, silt, clay, and remnant boulders of the bedrock. Often, this overburden is unstable, and it caves in before the casing can be installed in the borehole. Re-drilling the same 10- or 20-foot caving zone again and again does not always get the hole to stay open, and it takes time and fuel that reduces your net income on the job. A drill rig that can advance a steel casing with the air-rotary drill bit can overcome these caving overburden conditions. The casing keeps the hole open, while the hammer bit drills through the boulders in the overburden. This innovative technology is applicable to drilling water-supply wells and to drilling geothermal boreholes in a loopfield.

Presenter:
Todd Giddings, Ph.D., PG
Todd Giddings and Associates Inc., State College, PA
Todd Giddings, Ph.D., P.G., is a registered professional geologist, and the principal hydrogeologist and president of Todd Giddings and Associates, Inc. He has more than 45 years of experience in ground-water resources development, management, and remediation. His areas of professional interest are water-resources education, karst hydrogeology, and geothermal heat pump system design and training.

Browse 2012 NGWA Groundwater Expo and Annual Meeting

<< Previous Session | Next Session >>
NGWA may only post those brown bag sessions, Webinars, event sessions, and like for which we have obtained copyright permission from the presenter. Furthermore, by accessing or downloading any of these items, you agree they are for your own personal use and may not be disseminated by any means to others via any medium. Click here to read NGWA's proprietary legend and disclaimers before proceeding.