Dynadrill equipment produces reliable high performance dth hammer and button bits. Dynadrill offers overburden tools which are dth hammers and are designed to drill and case simultaneously through overburden, passing easily through large boulders, pulling lightweight, inexpensive casings behind them. On reaching the bedrock or required depth, the drill string is removed easily from the hole, leaving the casings in place. Drilling into the bedrock can then be continued using a normal drill bit.
