There are the results of computer simulating using DEFORM-2D specialized software and experimental researches during the pressing of aluminium alloys tubes with conical-stepped needles. On the basis of the experiment mathematical planning and dividing coordinate grid the influence of the taper angle and needle position to the pressing stress and the intensity of deformation relative to the die parallel land was established. The optimal parameters determining methods of conical-stepped needles geometry were proposed.
Existing methods of preparation of the oil based muds in laboratory conditions are reviewed in the article. Studies on the impact of a high intensity acoustic field exposure on the process parameters of drilling muds have been carried out in order to reduce the time of the water-in-oil emulsion preparation. The dependences of changes in the rheological characteristics and dispersability of the emulsion on the duration of its preparation are obtained. The authors also conducted an assessment of the stability of the oil based muds that are prepared using high-energy exposure after thermal aging under dynamic conditions (aging for 16 hours at a temperature of 80 °C in a roller oven with stirring at a speed of 25 rpm) and after 14 days in the state of rest.
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