A shell drilling damper with elevated flexibility von VELICHKOVICH, A. S, VELICHKOVICH, S. V

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Improving the reliability, durability, and efficiency of drill-rig shock absorbers with shell-type elastic elements von VELICHKOVICH, A. S, VELICHKOVICH, S. V

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Double-action vibration damper for controlling the drilling string dynamic mode von VELICHKOVICH, A. S, VELICHKOVICH, S. V

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Bottom-hole vibration damper with a sheathed variable-rigidity elastic element von Velichkovich, A. S., Velichkovich, S. V.

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Structural hysteresis in a shell-type vibration damper with distributed friction von VELICHKOVICH, S. V, POPADYUK, I. I, SHATSKII, I. P, SHOPA, V. M

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Calculation for the elastic element of the vibration damper of drilling columns von Velichkovich, S. V.

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System for protecting well rod pumping plants from vibratory, inertial, and impact loads von VELICHKOVICH, A. S, VELICHKOVICH, S. V, SHOPA, V. M

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Drill string vibration damper for wells in corrosive media von Velichkovich, S. V.

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BOTTOM-HOLE SHOCK-ABSORBER von VELICHKOVICH SEMEN V,SU, VELICHKOVICH ANDREJ S,SU

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SHOCK-ABSORBER FOR DRILLING STRING von VELICHKOVICH SEMEN V,SU, VELICHKOVICH IGOR S,SU

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HYDRAULIC SHOCK-ABSORBER von VELICHKOVICH SEMEN V,SU, POPADYUK IGOR I,SU

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TURBO-DRILL PARTS FACE WEAR PREVENTIVE DEVICE von VELICHKOVICH SEMEN V,SU, SHOPA VASILIJ M,SU, YAREMAK OLEG F,SU

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DEEP-WELL AGENT METERING-OUT DEVICE von VELICHKOVICH SEMEN V,SU, SHNERKH SERGEJ S,SU

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ECCENTRIC CLAMP von VELICHKOVICH SEMEN V,SU, TKACHUK PETR D,SU

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PISTON von VELICHKOVICH SEMEN V,SU, VASILECHKO ZENON D,SU

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TORSION BAR-TYPE COUPLING von VELICHKOVICH SEMEN V,SU, SHOPA VASILIJ M,SU, YAREMAK OLEG F,SU, KRAVETS PETR E,SU

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METHOD OF ADJUSTMENT OF SHELL SHOCK ABSORBER RIGIDITY von VELICHKOVICH SEMEN V,SU, SHOPA VASILIJ M,SU, POPADYUK IGOR I,SU, SHATSKIJ IVAN P,SU

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FLEXIBLE MEMBER von VELICHKOVICH SEMEN V,SU, SHOPA VASILIJ M,SU, POPADYUK IGOR I,SU, SHATSKIJ IVAN P,SU

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FLEXIBLE ELEMENT von VELICHKOVICH SEMEN V,SU, SHOPA VASILIJ M,SU, POPADYUK IGOR I,SU, SHATSKIJ IVAN P,SU

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FLEXIBLE CLUTCH von VELICHKOVICH SEMEN V,SU, SHOPA VASILIJ M,SU, POPADYUK IGOR I,SU, SHATSKIJ IVAN P,SU

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