Capping stack toolboxes
The intervention system includes four capping systems:
- Two 18 3/4” bore capping stacks developed to handle pressure up to 15kpsi
- Two 7 1/16” bore capping stacks designed for pressure up to 10kpsi
This should enable the industry to cap most subsea oil wells in water depths up to 3000m around the world, as well as providing flexibility for various contingencies.
Key facts
- Transportable by sea and/or air
- Available for a variety of international metocean conditions
- Designed for subsea use up to 3000m water depth
- Stored in four strategic regional locations around the world
- Manufactured by Trendsetter Engineering
All four capping stacks are designed into a standard configuration, with common pipework, valves, chokes and spools all rated to 15kpsi. The common framework gives greater flexibility by utilising interchangeable gate valves and rams. The key difference is the use of 7 1/16” 10k gate valves for the two 10k stacks and 18 3/4” 15k rams for the two 15k stacks.
Take a look at the factsheet to find out more about the capping equipment.
For more information about gaining access to the equipment, contact subseaservices@oilspillresponse.com.
15k capping stack
Roll over the capping system to find out more about each component
- Subsea Retrievable Chokes (x4)
- Allows the soft shut-in of the flow on the diverter spool outlet
- 18 3/4" Dual 15k Rams
- Sealing mechanism on the main bore
- Dual 5 1/8" 15k Gate Valves (x4)
- Allows the closing of the flow on the diverter spool outlet
- Dual 5 1/8" 15k Gate Valves (x4)
- Allows the closing of the flow on the diverter spool outlet
- Lower Connector
- Connection point to the flowing well
- H4 Mandrel
- Connection point for the running tool
- ROV Panel
- Allows control of the (open/close) valves on the system
- Acoustic Transponder
- Sends data (pressure / temperature) to surface vessels
- Flow Line Connector
- Connection point for the containment system
- Flow Line Connector
- Connection point for the containment system
10k capping stack
Roll over the capping system to find out more about each component
- Subsea Retrievable Chokes (x4)
- Allows the soft shut-in of the flow on the diverter spool outlet
- Dual 7 1/16" 10k Gate Valves
- Sealing mechanism on the main bore
- Dual 5 1/8" 15k Gate Valves (x4)
- Allows the closing of the flow on the diverter spool outlet
- Dual 5 1/8" 15k Gate Valves (x4)
- Allows the closing of the flow on the diverter spool outlet
- Lower Connector
- Connection point to the flowing well
- ROV Panel
- Allows control of the (open / close) valves on the system
- 7 1/16" 10k API Hub
- Connection point for the running tool
- Acoustic Transponder
- Sends data (pressure / temperature) to surface vessels
- Flow Line Connector
- Connection point for the containment system
- Flow Line Connector
- Connection point for the containment system
Ancillary equipment
Click on image for larger version
Capping stacks: common components
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1 x Test stand |
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1 x HCH4 Connector 18 3/4” 15kpsi rated (base) |
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1 x HC Connector 18 3/4” 15kpsi rated (base) |
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1 x HC Profile 18 3/4” API 15kpsi Adapter Spool |
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1 x H4 Profile 18 3/4” API 15kpsi Adapter Spool |
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1 x H4 Profile Adapter spool with weld prep end fitting |
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1 x H4 18 3/4” API 15K test mandrel |
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1 x HC 18 3/4” API 15K test mandrel |
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1 x 1m Spacer spool |
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1 x 2m Spacer spool |
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1 x 3m Spacer spool |
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1 x Diverter Spool 18 3/4” 15kpsi rated |
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4 x Diverter spool 5 1/8” blind flanges |
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4 x Dual Gate Valve – 5 1/8” 15kpsi hydraulically operated with ROV override |
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4 x Forged diverter leg elbows |
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Flowline connector system |
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4 x Subsea Retrievable Chokes – 15kpsi |
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1 x Structural support frame |
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1 x Subsea retrievable spreader bar |
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Rigging and Fastening Aids |
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Gaskets, Bolts, Studs, Nuts |
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Hot Stabs/Dummy Stabs/Receptacles 15kpsi |
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Anodes (as required) |
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Ram/Connector/Chemical Injection ROV Panels – |
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1/2” 15K psi ROV actuated/manual isolation valve (ROV Panel) |
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2 x PP/PT sensors |
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1 x Acoustic Transmittal System w/ 2 transponders |
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Subsea Accumulator Modules 40 x 15 Gallons |
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2 x Connector Parking Stands |
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1 x 18 3/4” API 15K dog bone for lifting HC/H4 connector |
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1 x 18 3/4” API 15K test flange c/w studs and nuts |
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5” BX Gaskets (Ring Gasket) – spares |
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18 3/4” VX Gaskets – spares for H4 connector |
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18 3/4” AX Gaskets – spares for HC connector |
10k specific components
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18 3/4” to 7 1/16” transition spool |
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Dual 7 1/16” 10K gate valve |
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Upper Connector Interface – 7 1/16” API hub |
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Upper 7 1/16” API Hub test plug |
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Perforated Subsea DrillString |
15k specific components
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Upper 18 3/4” 15kpsi H4 test plug |
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Dual Blind Ram 18 3/4” 15kpsi |
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Upper 18 3/4” H4 mandrel |
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Perforated Subsea H4 Drill String Running Tool |
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Perforated Subsea HC Drill String |
ROV tooling per system (10 kpsi and 15 kpsi)
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Dummy hot stab |
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API 17H dual port hot stab |
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Connector draw down tool |
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Gaskets |
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Class IV torque tool |
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Class V torque tool |
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1 x Spreader bar pin removal tool |
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* Additional gaskets not listed above |