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1. (WO2017155674) PRESSURE COMPENSATED FLOW TUBE FOR DEEP SET TUBULAR ISOLATION VALVE

Pub. No.:    WO/2017/155674    International Application No.:    PCT/US2017/017963
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Thu Feb 16 00:59:59 CET 2017
IPC: E21B 34/10
E21B 17/00
F16K 1/18
Applicants: BAKER HUGHES INCORPORATED
Inventors: MILLER, Wade, A.
BURRIS, John, E.
HAIR, Michael, L.
Title: PRESSURE COMPENSATED FLOW TUBE FOR DEEP SET TUBULAR ISOLATION VALVE
Abstract:
The annular space surrounding a flow tube in a subsurface safety valve is sealingly isolated at opposed ends of the flow tube and pressure compensated to the tubing pressure. The subsurface safety valve is inserted and aligned in an outer housing so that hydraulic operating connections are sealingly aligned with opposite hand split ring seals that are properly compressed when the safety valve is secured in its surrounding housing. The assembly is then able to meet high pressure, heavy debris, and marine environment service requirements for subsea conditions with minimal reconfiguration for what would otherwise serve as a borehole subsurface safety valve.