CONNECTING UNIT OF CHOKE MODULE AND PRODUCTION TREE Russian patent published in 2020 - IPC E21B33/38 F16L37/00 

FIELD: oil and gas industry.

SUBSTANCE: present invention relates to oil and gas industry. In particular, to a connecting unit for connection of sleeves of a choke module and a production tree in equipment for underwater production of hydrocarbons. Connecting assembly comprises: a connecting bushing of the module choke and a connecting bushing of the production tree, which on their outer cylindrical surface of teeth, gaps between which form splines; mandrel having an inner cylindrical surface comprising a plurality of projections having a cross-section substantially in the form of a ring sector and located around the circumference of the mandrel, wherein on the upper surface of each of the projections at one of its edges there is a lead-in chamfer; protrusions of mandrel are made with possibility of passage through splines of connecting bushing of production tree, with provision of contact of chamfers of mandrel ledges with chamfers of teeth of connecting bushing of production tree equipment when mandrel is rotated relative to longitudinal axis of connecting sleeves.

EFFECT: reduced dimensions, metal consumption, simplified design of connecting unit, design also provides for possibility to use standard tool of remote unmanned underwater vehicle and possibility of using both mechanical and hydraulic drive.

6 cl, 10 dwg