FIELD: manufacturing technology.
SUBSTANCE: invention relates to connection unit of riser for connection of separate vertical connections in offshore oil and gas plants. More specifically, the present invention relates to a connection system of a riser, which can be used in access systems in a well and in blowout prevention equipment of drilling systems. Riser coupling assembly for tight connection of the first riser link and the second riser link, comprising a nut, a locking sleeve and a collet, mounted on the second riser link; collet fitted between second connection section of second riser link and locking sleeve; between nut and locking bushing there is a thread providing possibility of nut rotation relative to locking bushing and translational movement of locking bushing relative to longitudinal axis of riser links at nut rotation, collet is made with possibility of tight connection of the first connecting section and the second connecting section to each other at specified translational movement of the locking bushing.
EFFECT: technical result consists in providing fast and reliable connection of riser sections.
4 cl, 4 dwg
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