The distinguishing feature of the dual-rotary (DR) drill rig is a lower rotary drive, which is used to independently advance casing up to 40 inches, depending on the drill model.
Because shallow ground temperatures are relatively constant throughout the United States, ground source heat pump installations can effectively be used almost anywhere.
More than 250 exhibitors – including 36 new ones – spotlighted their products and services at the National Ground Water Association’s 2009 Ground Water Expo, which took place Dec. 10-13 in New Orleans.
A wide variety of techniques and equipment have been used to construct continuous-flight auger (CFA) piles. Some key components of good quality construction: Drilling Rigs – The rig must have
Semitropic Water Storage District wishes to respond to your November 17, 2009, article entitled “Court Halts Unlicensed Drilling by Public Entity” (posted online at www.thedriller.com). The article concerned the case
Joe Patterson, vice president of marketing for TEI Rock Drills in Montrose, Colo., was kind enough to spend some time offering his thoughts on a variety of drilling-related topics recently.
When starting a new monitoring program, it often is a good idea to collect four rounds of quarterly data, particularly if investigation data for your site are limited or obsolete.
"Oh,
I don’t really mean you, of course. I don’t expect anyone to ’fess up to being
an overbearing SOB. But it’s a good bet you know plenty of other people who fit
the description, right?"
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