... the layout of the drill string perfodrill provides trajectories of perforations with a minimum radius of curvature similar to the arc of a circle which is inscribed the Perfodrill BHA. Materials and methods 1. Determination of the smallest radius of perforation channel curvature drilled by a technical system «Perfodrill». 2. Research of the perforation channel trajectory in applying the «Perfodrill» technology. 3. The stand experiments of the drillingchannels in concrete block by the new technology ...

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