reverse circulation drilling


Also found in: Acronyms.

reverse circulation drilling

[ri′vərs ‚sər·kyə¦lā·shən ‚dril·iŋ]
(mining engineering)
A variation of the rotary drilling method in which the cuttings are pumped up and out of the drill pipe, an advantage in certain large diameter holes.
Diamond core drilling in which the water is injected through a stuffing box into the annular space around the drill rods and thus forced up special large drill rods.
References in periodicals archive ?
TSX VENTURE: CSQ), a resource exploration company, has started a programme of reverse circulation drilling at its Bruner project.
Coro Mining Corp (TSX: COP), a mining company focused on medium-sized base and precious metals deposits in Latin America, is to start reverse circulation drilling at its Chacay project in early December 2010.
To facilitate the rapid generation of targets for follow-up reverse circulation drilling, the RAB program is alternating between the Stage 1 and Stage 2 drilling patterns.
The larger volume, better homogenized samples obtainable through reverse circulation drilling are anticipated to provide more accurate and representative results than those that were obtained from the small diameter core holes drilled by Occidental Minerals in the 1960s.
U) is pleased to report that reverse circulation drilling will commence on November 16th on the Company's Leonid project located in Elko County, Nevada under joint venture agreement with Nevada Superior, Inc.
There is thus negligible reserve risk and a fair amount of upside potential due to empirical undervaluation of the grade by the method of reverse circulation drilling used.
It is much faster and less expensive than conventional core or reverse circulation drilling and will permit Exeter to drill patterns of drill holes, with which to home in on hidden deposits at La Cabeza, much more quickly and cost-effectively than would otherwise be the case.
The bulk of historic drilling on the property has been reverse circulation drilling which have been effective in outlining the broad zones of high grade gold mineralization but provided limited detailed geological information.
TSX VENTURE:JPN)(OTCBB:JPNJF) ("J-Pacific") is pleased to report that it has commenced a reverse circulation drilling program on its HC Project in the Pipeline-Cortez area of the Battle Mountain-Eureka Gold Trend in northeastern Nevada.
Reverse circulation drilling should commence within a week.
The program will include both diamond and reverse circulation drilling.
In addition to follow up diamond drilling at Zone 2 and 3, approximately 5,000 meters of reverse circulation drilling is planned at Kantela to test new targets developed in an induced polarization survey completed in 2004.