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 ?
Atlas Copco can provide a complete solution for reverse circulation drilling including drilling rig, compressor, booster and drill string.
The company plans to drill 26,000 metres of NQ core with three diamond drill rigs, and 9,000 metres of reverse circulation drilling on exploration targets with a lightweight RC fly rig.
Work planned in Namibia includes additional reverse circulation drilling to test calcrete and leucogranite hosted uranium mineralization on the Dome property in the Erongo region.
The company said that 17 hole Reverse Circulation drilling program conducted by Element 92 in September 2009 to test 5 new targets produced encouraging results with nine holes returning anomalous intercepts including 10 meters 458ppm U3O8 in hole TAL013RC and 5 meters 1,016ppm U3O8 in hole TAL011RC.
The Swedish industrial group Sandvik AB said on Tuesday (3 October) that it has completed its previously announced acquisition of Chile-based rotary and reverse circulation drilling consumables manufacturer Implementos Mineros SA (Implemin).
He estimates the quarry holds a known resource of about 36 million tonnes and hopes to embark soon upon an exploration program of deep diamond drilling and reverse circulation drilling on an estimated resource of more than one billion tonnes.
Golden Cross Resources reports that reverse circulation drilling on its Kempfield silver-baryte project in New South Wales has yielded encouraging results.
By integrating the project generator business model with low-cost reverse circulation drilling, the company intends to leverage its portfolio by identifying, and focusing on, the highest quality projects for partnerships and advancement.
The reverse circulation drilling is focused on defining the extent of Winu's supergene zone, while the diamond drilling tests the extents of the deposit.
A new 1,600-metre reverse circulation drilling program will focus on the Currans prospect as well as other targets and is scheduled to be complete by the end of July.
The Exploration Target has been prepared on extensive drill data collected since mid-2017, including a recent exploration drill program of 76 holes for ~16,000 metres of reverse circulation drilling and 3 diamond drill holes totalling ~1,100 metres.
In addition to the regional geophysical surveys completed over these license areas in 2011, Casa have carried out 19,522m of diamond drilling, 2,720m of reverse circulation drilling and excavated 6,274 line metres of trenches on their respective licenses.