auger drilling refers to one type of rotary drilling.The term "auger" comes from the word «Schnecke», which translated from German means screw curls, snail.
Features of work
This type of drilling is significantly different from other species, in particular, that when the work is performed Remove broken rock and its transportation by the well does not flow the cleaning agent, and by the rotation of the column.
auger drilling is very widespread, is a universal method used for sinking wells in the shallow soft or loose rocks.This method is suitable for work in the gravel rocks.It is also widespread in the Seismic exploration, development of blast holes, hydrogeological studies in engineering orientation, geological mapping, mineral exploration.
drilling technology
augers drilling loosen during operation and crushed rock, and the resulting product is then transferred to the wellhead at a special screw conveyor.Technology of work includes three main points.These are: the cooling process tools involved in the destruction of rocks, transportation to the surface of the product failure and the resulting strengthening of the walls of the well raised by rocks.
auger drilling is done drilling tool.There are three types of technological tools.Drilling equipment - a column of conventional screws with a chisel, a shop with a screw crown, the usual columns and hollow with a removable bit and wireline.
widely used for work with loose rocks two- or three-bladed chisel, having a flat or spiral blade.In those cases where auger drilling work is performed with a rock of medium hardness, a higher wear resistance, so the rounded profile chisel is used, saturated with hard alloys.
At work used a special high-tech installations.Drilling speed is enormous, so the requirements for installation - high mobility and portability.Settings made portable or self-propelled.
main positive feature of auger drilling - involuntary samozakreplenie shattered rock walls of the well when it is climbing augers, as it seems to be "massaged" and creates the effect of a kind of plastering.
Note that this process - a high-tech, but it is quite simple in terms of organization way of doing underground workings at which reduces to a minimum the risk of collapse during operation.Auger drilling can be carried out almost always, regardless of the season.The deformation of the surface at the same time is negligible, that is very important when working under railways and highways, buildings and farm buildings.
A notable advantage of working - a sufficiently high speed, simplicity and small damage to infrastructure and the environment.
specialists around the world celebrate constant interest in this method of drilling and predicted good prospects for its development.
