Drilling head connection for use in a reverse circulation system

摘要

The invention relates to a drilling head connection specifically designed for reverse circulation operation and the connection can be screwed on a double pipe system in such a way that the drilling fluid injected into the annular space passes through the annular channel and thereafter through the channel of the drilling head so as to lubricate the leading surfaces of the bit and the plug moves up through the inner space with the excavation material passing through the lateral channels and also the connection can be used with any drilling head.