Horizontally directed drilling (GND) belongs to a taranteine method of laying various engineering communications (sewage, water supply, power cables). This small article will be discussed about the features and advantages of this method, as well as the equipment necessary to conduct it.
For drilling, various technical devices (drilling rigs, geolocation systems, units for mixing a bentonite solution, welding equipment) are used). Delivery of the drilling station to the site of work is carried out using special cargo equipment. It is important that the vehicle is attended by special gangways, along which the machine can move out of the trailer of the car. The most important condition for drilling is the presence of centralized water supply. If there is no fire hydrant near the site of work, then in this case it is necessary to organize water supply.
Directly the GNB process itself consists of several consistent stages:
the preparatory stage at which the study of the soil on the site is being studied, the search for engineering communications and natural obstacles on the drilling route;
drilling of a pilot well, which is produced by a drilling head with a built -in touch sensor, sending data on the position of the working tip to the screen of the geolocation system. In order to reduce friction and eliminate the land collapse into the well, a solution of bentonite is pumped;
the expansion of the well using a Rimmer so that its dimensions are approximately 25% exceeding the diameter of the pipe;
Laying the lap of the pipeline – the finish stage of work.