Fmc Kongsberg Subsea as

Simen Landa

Heyn Halfdan Magnus

Stig Fredrik Mathisen

Dharmesh Gadaria

Kandasamy Balendran

Espen Rinde Brauti

Brauti Espen Rinde

The following invention relates to a subsea actuator () for actuating a subsea rotating component (); comprising: a first biasing element (); a motor (); a holding element () configured to receive an input force; a rotatable stem () operatively connectable to the component; a force transmitting arrangement () connectable to the first biasing clement () and the holding element (); a first connection which in a first mode is configured to lock the stem () in a rotatable engagement with the motor () and in a second mode is configured to unlock the stem () from the rotatable engagement with the motor () and allow the stem () to be influenced by the first biasing element (); wherein the first biasing element () and the stem () are releasably connected via the force transmitting arrangement (), such that when the first biasing element () and the stem () are released from each other, the first biasing element () is configured to be pre-tensioned to a position representing a first pre-tensioned position of the actuator () without operating the stem (); the holding element () is configured to exert a holding force on the force transmitting arrangement () and the first biasing element () in the first pre-tensioned position; and wherein, when the first biasing element () and the stem () are connected and the first biasing element () is pre-tensioned, the first connection is in the first mode such that the motor () is configured to operate the stem () to a position representing a second pre-tensioned position of the actuator (); wherein, in the second pre-tensioned position, upon loss of input force to the holding element (), the holding element () is configured to release its holding force on the force transmitting arrangement () and the first biasing element (), thereby the first connection is unlocked to its second mode, such that the pre-tensioned first biasing element () is released and rotates the stent () to a position representing a release position of the actuator ().

Subsea actuator and method of actuating a subsea actuator

The present invention relates to a subsea hydraulic control device () for hydraulically controlling a subsea module (). The control device () comprises a hydraulic distribution unit () with a valve unit () and a manifold unit (), where hydraulic fluid lines are provided in the valve unit () and in the manifold unit (). The hydraulic distribution unit () comprises a low pressure hydraulic input port () connectable to a low pressure fluid source (LP) and connected to a low pressure fluid line () within the hydraulic distribution unit (), a high pressure hydraulic input port () connectable to a high pressure fluid source (HP) and connected to a high pressure fluid line () within the hydraulic distribution unit (), a return port () connectable to a return fluid reservoir (R) and connected to a return fluid line () within the hydraulic distribution unit () and a number of hydraulic output ports () connectable to subsea actuators (A) of the subsea module (). A section of the low pressure fluid line () is provided as a first fluid bore (B) in the manifold unit () and a section of the high pressure fluid line () is provided as a second fluid bore (B) in the manifold unit (). The configuration of the respective bores (B, B) in the manifold unit () is determining which of the output ports () being a low pressure output port () connected to the low pressure fluid line () and which of the output ports () being a high pressure output port () connected to the high pressure fluid line ().

Subsea hydraulic control device and a method for producing thereof

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Oslo, Norway

Simen Landa