SYSTEM, METHOD AND DEVICE FOR MODULAR ASSEMBLY OF PRODUCTION CHRISTMAS TREE PROVIDING REDUCTION OF CARGO WEIGHT DURING PRODUCTION CHRISTMAS TREE TRANSPORTATION TO DRILL RIG Russian patent published in 2014 - IPC E21B41/00 

FIELD: mining.

SUBSTANCE: modular assembly (21) contains the top module (23), the bottom module (25) and throttle bridge module (27). The top module (23) of production Christmas tree contains casing head (41) of production Christmas tree. The bottom module (25) of the production Christmas tree contains guidance system (51) and connects the pipelines to intra-field infrastructure (57). Throttle bridge module (27) contains the throttle and measuring bridge and provides the connection of three said modules. Before the delivery to the drilling rig (31) the parts of modular assembly (21) of the production Christmas tree can be connected together and tested onshore. After the delivery to the drilling rig (31) they are separately lifted from the barge (29) to the drilling rig with the help of the crane (33). After the components of the production Christmas tree are on the drilling rig (31) the modular production Christmas tree (21) is again assembled and then mounted on the sea bed (35) via the winch (37).

EFFECT: reduction of cargo weight during transportation of production Christmas tree components from barge to production drilling rig.

12 cl, 13 dwg