reverse circulation drilling

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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.

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No references found			According to a spokesman for Wondjina Institute, one of USCorp's consulting geologists, "A review of plots of the portable X-Ray Fluorescence (pXRF) soil data in the area of initial USCorp Reverse Circulation drilling (Holes TPRC 2-4) strongly suggests that the high grade silver mineralization may be associated with high angle northeast trending mineralizing structure(s). USCorp Reports Additional Preliminary Results of Phase One Drilling ... by Business Wire LAS VEGAS -- USCorp (OTCBB: USCS) is pleased to announce preliminary results of its reverse circulation drilling operations conducted by Harris Drilling of Escondido, California at USCorp's Twin Peaks Project in Yavapai County, Arizona. USCorp Reports Preliminary Drilling Results on Its Arizona Twin Peaks ... by Business Wire Urex plans to implement a 4,000 meter drill program consisting of a combination of core and reverse circulation drilling in early February 2008. Urex Energy Corporation Opens Exploration Office in Paso de Indios - ... by Business Wire			Reverberator Reverberatory Furnace Reverdy, Pierre Revere Revere, Joseph Warren Revere, Paul Reverence reverend reverie Reversal reversal film reversal of dip reversal process reversal spectrum reversal speed reversal temperature reverse Reverse Address Resolution Protocol Reverse ARP reverse bevel reverse bias reverse bonded-phase chromatography reverse Brayton cycle reverse Carnot cycle reverse cell reverse circulation drilling reverse code dictionary Reverse Condensation reverse current reverse curve reverse deionization Reverse Dictionary reverse direction reverse DNS reverse drawing reverse engineer reverse engineering reverse fault reverse feedback reverse flange reverse genetics reverse graft reverse key reverse lay reverse mutation reverse osmosis reverse passive anaphylaxis reverse pinocytosis reverse pitch reverse polarity reverse Polish notation			reverse bevel reverse bevel reverse bevel Reverse bias Reverse bias Reverse bias Reverse bias Reverse bias Reverse Biased Safe Operating Area Reverse bite injury Reverse Black Lists Reverse Blocking Diode Thyristor Reverse Body Bias reverse bonded-phase chromatography Reverse Bow-Tie Antenna Reverse brain drain reverse Brayton cycle Reverse Brazil Nut Problem Reverse C Compiler Reverse Capture the Flag Reverse Carlson Surge Device reverse Carnot cycle reverse cell Reverse Cerebral Steal Reverse Channel Control Order Wire Reverse charge call Reverse charging Reverse Cholesterol Transport Reverse Circular Disk of Scatterers Model Reverse Circulation reverse circulation drilling Reverse Circulation Junk Basket Reverse circumcision Reverse circumcision Reverse circumcision reverse code dictionary Reverse Code Engineering reverse Colles' fracture Reverse Common Control Channel Reverse Common Signaling Channel Reverse commute Reverse compiler Reverse Condensation Reverse conducting thyristor Reverse Control Channel Reverse conversion Reverse Convertible Bond Reverse Convertible Note Reverse Convertible Note Reverse Convertible Note Reverse Convertible Notes Reverse Corneal Allograft Reaction Reverse course Reverse Course and Advise Reverse Crescent Kick Reverse Cross Blot Hybridization Reverse Cross-Site Request reverse crush Reverse Crushes

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