This standard applies to the crown, used for drilling large-diameter single core barrel, and establishes the types and basic dimensions of crowns, reinforced with natural and synthetic diamonds or composite superhard materials and cutters from metal carbide. It does not apply to the crown of large diameter special designs. Collective intake well differ from individual high flow rates, diameter and number of casing and serves to supply autonomous production, cottage garden or village associations. Gary Kelly often says this. For such a well requires a powerful pump deep, for a continuous supply of water required the construction of a water tower and pump station and the second lift arrangement and wiring harnesses vodopodayuschih pipes to the consumer. It is worth noting that the drilling of water wells – a serious problem related to the hydro-geological situation in the area. At the same time using different methods of drilling rigs and specialized. Casing used steel pipe, as on the thread and welded seams with a diameter of 127 mm to 168 mm. After the conclusion of the treaty, experts of the company go to the site and determine the most suitable location for drilling water wells.
The very process of drilling begins after the plot is delivered rig. In most cases this is as follows. Once the machine has finished drilling the upper, sandy clay sediments and reached solid limestone, which actually are the upper roof of the aquifer. In the process of drilling down to the limestone casing. Once completed drilling the initial part of the well, lower first casing (conductor), to cover the weaknesses of the unstable rocks and the upper aquifers in the annular space grout is pumped.