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AUTOMATIC CLOSURE FOR A SUBSEA INJECTION SKID

IP.com Disclosure Number: IPCOM000248863D
Publication Date: 2017-Jan-18
Document File: 3 page(s) / 395K

Publishing Venue

The IP.com Prior Art Database

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This is the abbreviated version, containing approximately 55% of the total text.

Publication

1

AUTOMATIC CLOSURE FOR A SUBSEA INJECTION SKID

SUMMARY

[0001] A Subsea injection skid is often placed at a seabed or other appropriate

location adjacent a tree at a wellhead for offshore operations. The skid may provide an

platform or interface for interacting with the tree, for example to allow an operator at a

rig or platform to open and close barrier valves. Exercising such control requires

effective electrical coupling and hydraulic coupling through a dedicated riser. However,

at some point, there may be a desire to de-couple such controls and, for example, return

the skid to surface. Conventionally, this may involve hydraulic control valves that are

mechanically forced to close when the main connector is disengaged. However, this does

not necessarily ensure that both electrical and hydraulic de-coupling is attained in

concert. That is, whether hydraulic coupling takes place intentionally or accidentally,

the current system utilizes a disassociation of the hydraulic coupling from the electrical

coupling. As a result, the possibility of decoupling the hydraulics while the electrical

coupling remains in tact persists. This can lead to significant electrical damage to the

skid equipment as it is water exposed.

[0002] Thus, a system to breakdown the electric power and ensure the subsea system

automatically returns to a safe, sealed state is proposed as shown below. The type of

valves, solenoid (normally closed when unpowered), used in conjunction with the system

to extract the electric socket at connection breakdown ensures a safe way to automatically

close the main valves of the system without involving a control system logic.

Publication

2

DESCRIPTION

[0003] An extraction fork is mounted on the connection head. This extraction fork

pulls out one or more electr...