FIELD: oil producing industry, particularly, joining of tubings, sucker rods and sucker rod coupling. SUBSTANCE: parts of compound body of coupling are hollow and interconnected by hinged joint in form of ball pin. Joint of body lower part with ball pin and body upper part is effected over equidistant spherical surfaces with clearance regulated with help of retainer located in threaded hole of body upper part with thread pitch smaller than that of fastening thread of ball pin. EFFECT: reduced bending forces and wear of sucker rod string parts in interval of depth of attaining curvature and simplified design of claimed sucker rod coupling. 1 dwg
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