Christmas tree for subsea production

Wells – Submerged well – Connection or disconnection of submerged members remotely...

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Details

166347, 166368, E21B 43013

Patent

active

052996417

ABSTRACT:
This invention refers to a wet Christmas tree (20) utilized particularly in subsea production systems, including at the bottom a connector (22) for purposes of locking to the wellhead, a guide structure (24) consisting of a central ring attached to said connector (22), supporting arms (26) and guide funnels (28), a valve block (30), a reentry mandrel (32), gate-type lateral valves (46, 48, 50, 52) with metal/metal sealing and hydraulic driving with spring-type return flow lines with loops (54, 56, 58) and piping for the crossover line, hydraulically adjustable chokes (60, 62), a flow line terminal (36), a reentry pole (42) and a control system.

REFERENCES:
patent: 3163224 (1964-12-01), Haeber et al.
patent: 3215203 (1965-11-01), Sizer
patent: 3870101 (1975-03-01), Helmus
patent: 4625806 (1986-12-01), Silcox
patent: 4629003 (1986-12-01), Baugh
patent: 4630680 (1986-12-01), Elkins

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