US 2006/0065866 A1 · SINGLE-EFFECT SUBMARINE ACTUATOR FOR OPERATING VALVES

Abstract

The invention relates to the field of the submarine valve actuators, and specifically to those actuators, that in order to effect a standard valve closing operation are connected to an oleo system feeding an hydraulic cylinder (1), whose plunger (3), by a mechanical link, operates the valve and compresses a spring (8) which provides for the standard opening operation. Said actuators are provided with an input shaft (21) for connecting a ROV for valve opening and closing operations when there is a failure in the oleo system. The connection between the ROV-operated input shaft (21) and the mechanical link between the piston (3) and the spring (8) is carried out by a planetary gear reducer (15).

Claims10

Dependent claims

Single-action submarine actuator for operating valves of a type comprising:

an hydraulic cylinder including a plunger;
a spring;
a first shaft located between said hydraulic cylinder and said spring and including a rack, said shaft being selectively actuated by the plunger of the hydraulic cylinder to open the valve, and biased by the spring toward a closed position of the valve;
and
the actuator further comprising an input shaft for selective connection to a ROV (Remote Operator Vehicle), the input shaft being mechanically connected to the rack of the first shaft by a planetary gear reducer.

2 more elements

Dependencies are inferred from the claim text.

Single-effect submarine actuator for operating valves

Life of this patent

Single-effect submarine actuator for operating valves

Life of this patent

Abstract

Claims10