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1. (WO2017016690) SUBSEA ELECTRIC ACTUATOR

Pub. No.:    WO/2017/016690    International Application No.:    PCT/EP2016/059900
Publication Date: Fri Feb 03 00:59:59 CET 2017 International Filing Date: Wed May 04 01:59:59 CEST 2016
IPC: F16K 31/04
F16K 31/50
F16H 25/20
E21B 33/035
Applicants: PETROLVALVES S.P.A.
Inventors: GARRONE, Marco
AMBROSINI, Ivan
CAZZOLA, Tiziano
Title: SUBSEA ELECTRIC ACTUATOR
Abstract:
A subsea electric actuator (100) includes a housing (1) configured to be filled with dielectric oil, an electric motor (2), a brake (3), a clutch (4), and a spring (9). The clutch (4) and the brake (3) are configured to maintain the spring (9) in a compressed position. In certain embodiments, the actuator (100) further includes a planetary gear (5) and a multi-turn gear assembly, such that the planetary gear (5) and the multi-turn gear assembly are configured to multiply the torque provided by the electric motor (2). The actuator (100) can further include a ball screw (7) and a nut screw (8) configured to convert the torque provided by the motor (2) into linear thrust to compress the spring (9).