FIELD: oil-and-gas production.
SUBSTANCE: expansion band includes case, where flexible unit and sub located, connected to electrical submersible centrifugal equipment. Expansion band equipped with barrel, located in a case and fixed to avoid crank. Surfaces of barrel ends and sub wavy shaped for transmission of torsional vibrations into barrel axial displacement. Case and sup connected to each other with a joint sleeve.
EFFECT: efficiency increase of torsional vibrations absorption.
2 cl, 1 dwg
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