Replies to post #92436 on CMKM Diamonds Inc. (fka CMKX)

[gump90]

An 'air' drill is a percussion drill.
The drilling is sometimes called R C for Reverse Circulation. It's cheap and fast but all it does is make holes. You get the rock chips back to surface because the compressed air blasts them back. Then you get to examine the chips and sample them if you wish. They beat the bee Geezus out of the rock like a huge jack hammer. They use a big compressor to supply the air. Not really good except for speed of penetration and low cost per foot. I can see them at the F A L C pounding down quickly through the gravel which is 300 feet thick in places. Then they lower steel casing lengths into the hole into the bedrock and begin coring beyond that using normal drill rods going down inside the casing which is a bigger diameter.