When developing drilling fluid formulations, first of all, the geological situation should be assessed, the mineral composition should be determined and the properties of the rocks to be drilled should be comprehensively studied.

Until recently, bench studies on the development of drilling mode parameters with diamond tools were carried out without taking into account the influence of downhole pressure.

It is known that the content of carbonate rocks in argillites affects their stability and therefore can be used as a predictive parameter when drilling unstable, prone to collapse zones of argillites. The available chemical-analytical methods for carbonate determination are complicated and unproductive.

Well sinking in mudstones of the Exploration Formation is usually accompanied by collapse of well walls. This leads to high time consumption for wellbore development and re-drilling of collapsed intervals ...

The introduction of the KSSK complex in the Norilsk Integrated Exploration Expedition required the use of non-structural flushing fluids with low solid phase content, since small gaps between the core barrel and drill pipe, as well as between the borehole walls and drill pipes, increase the pressure in the injection line ...