CONNECTION UNIT OF WATER-SEPARATING COLUMN Russian patent published in 2014 - IPC E21B17/07 

FIELD: construction.

SUBSTANCE: invention relates to a connection unit for use in a water-separating column (marine riser) (1). The connection unit comprises inner and outer tubular elements (21, 22), installed as capable of mutual displacement in axial direction. Tubular segments (21, 22) are connected to appropriate segments of the riser with formation of a chamber (23) with a piston (24). The piston (24) separates the chamber (23) in the radial direction into the first and second parts (25, 26) of the chamber. At the same time the first part (25) of the chamber, which in the initial position of the connection unit comprises a non-compressible fluid, is reduced in volume as the inner tubular segment (21) extends from the external tubular segment (22). According to the invention, the connection unit is equipped with a connection line (30) for fluid, stretching from one part (25) of the chamber to its other part (26). The connection unit provides for control of relative movements of tubular segments (21, 22) by means of provision of the possibility of the fluid flow to flow along the connection line (30) from one part (25) of the chamber into its other part (26).

EFFECT: expansion of a time slot for actions with a riser.

18 cl, 7 dwg