The principle of Direct Drill is based upon the well known and proven technologies of Horizontal Directional Drilling and Microtunneling. Direct Drill is a combination of the finest features of these two techniques, and thereby offering economic and ecological advantages surpassing the two techniques individually.
Direct Drill is best described as a continuous drilling process of (sleeve)pipes for cables ranging in diameter from 8” to 24”. The pipe is installed from the rig-site in one single phase. In contradiction to traditional HDD technique, Direct Drilling does not require a large offshore marine spread in case of a shoreward landing, which results in a considerable reduction of costs.