There are many methods of trenchless: horizontal drilling, piercing, sanitation, etc. buroshnek All these methods are designed for laying pipes under the ground. gnb method takes a leading place among all the trenchless technologies as possible, and on prevalence. Advantages of hdd as compared with traditional methods of engineering communications are obvious: speed, less financial and labor costs, the possibility laying in places inaccessible to other methods, environmental friendliness, safety. Basically Horizontal Directional Drilling is used for transitions, which for one reason or another can not be performed openly. For example, under natural and man-made obstacles (rivers, wetlands, roads, houses, ecological zones, etc.) More and more horizontal drilling is used for economic reasons: because of the speed of installation, lack of need for improvement, filling, bringing substantial resources of technology and manpower. The preparatory process precedes full organization of the work requires a team of at least 3 professionals (excluding laborers): the operator on the locator, the operator of the installation of hdd and operator mixing plants, mixing bentonite slurry.
Preliminary training involves a comprehensive analysis and exploration of the jobsite. Analysis of soil, abundance of communication and other barriers in the land, planning and calculation of the trajectory of drilling. Prior to the drilling installation brought in the place of work on the vehicle corresponding to its size and weight (trawl, semi-trailer or truck). The vehicle must be equipped similar to a certain angle of the Congress (usually 17-20 degrees). Next to the installation of the system to training of specialized drilling mud is mixed water, bentonite and polymers.