to drill and drive perforated casing into an artesian alluvial aquifer to a depth of 150 feet. Each of the wells flowed around 300 gpm. The wells were installed to supply water... several 10" holes for the installation of 4" monitor wells with 6 5/8" augers to a depth of 300' using a Failing F-10. George Air Force Base, Victorville, California Phoenix... tools, like loose sands, gravels, and cobbles. ARCH can also be useful for shutting off water behind the casing. For example: While working on a job in Phoenix, Arizona, we...

, filtration control and maybe the addition of some lost circulation material will stabilize most in-place formations and some alluvial deposits as well. The hydrostatic pressure... in the borehole caused by the weight of the drilling mud will overcome most formation pressure associated with water, oil or gas pressure. Most importantly, and contrary to popular... the productivity of the well. Wells drilled with low solids, low filtration drilling muds develop faster and are more productive than wells drilled with air in the same area. Lost...

. Stewart Brothers used the bit to core 11 feet of basalt. To aid in the cooling of the bit, a small amount of water was poured down the inside of the augers during the coring process.... When the bit was removed from the hole and inspected, it proved to hold up very well. There was some slight wear, but little damage was done to the cutters. Stewart Brothers sees...