Selection of a drill according to the geological conditions

 use single bottom of auger core drilling bit bucket, if the diameter is too small can or bucket with dumping soil clovenfooted board core drilling bit bucket. 2, mud, sticky soil is not strong, sand, cement poor gravel layer smaller particle size, can be equipped with a double bottom core drilling biting core drilling bit bucket. 3, hard clay: use a single port into the soil (single double bottom can) auger core drilling bit bucket, bucket teeth straight or spiral. 4, permafrost: less available ice bucket teeth straight auger hopper and auger core drilling bit bucket, can be large cone ice auger, a description that auger for soil (except silt outside) are valid, but there must be no use of groundwater in the case, in order to avoid the suction effect caused by stuck. 5, cemented gravel and strongly weathered rock: be equipped with a conical double bottom auger and auger core drilling bit bucket (large diameter single-port, dual-port with a small particle size) 6, stroke bedrock: drum cutter with coring core drilling bit - Tapered auger - rotary core Drilling Tools bucket digging double bottom, straight or spiral cutter core drilling bit - rotary core drilling bit bucket digging double bottom. 7. breeze bedrock: with cone core drilling bit coring barrel - conical auger - Rotary core drills bits bucket digging double bottom should be taken if the diameter is too large grade core drilling biting process.