© Det Norske Veritas AS. All rights reserved.
September 2011
2
Templates & Manifolds
This module will cover:
� Applicable Codes and Standards
� Templates- Purpose of a template
� Manifolds- Purpose of a manifold
� Foundations
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September 2011
3
Goal
� Differentiate different methods and understand reason for choosing different design
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September 2011
4
Codes and standards
The following standards are a selection normally used for template/manifold design. The code requirements will vary with customer preference and local legislation
- ISO 13628-1- Steel structure: NS 3472 (Design methods and utilization of material, does not
cover loads)- NORSOK U-001 (Dropped object)- ASME B 31.3- ASME B 31.8- DNV-OS-F101- BS8010 Part 3- DNV Rules for planning and Execution of Marine Operation
- New Standard proposed: ISO 13628-15 “Structures and Manifolds”
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September 2011
5
Purpose of template
� Being the guide, hang off and support to drilling and the wellhead conductor.
� Can be integrated with protection against fishing gear and dropped objects
� Based on seabed condition will the template be designed with- Mudmats as foundation and provide bearing capacity to avoid settlements- Skirt to penetrate seafloor for resist lateral forces- Skirt to provide friction against heave during installation- Washout sleeve to avoid shortfall and fracture in seabed during 36” drilling- Suction system to assist in penetrating the seafloor and leveling
© Det Norske Veritas AS. All rights reserved.
September 2011
6
Templates and Manifolds
The function of the template will vary with
� Location- Local legislation
� Installation methods- Moonpool, drillpipe, cranevessel, modular, barge or wet tow
� Pipeline methods- Horizontal or vertical flowline connection, pipeline forces,
� Protection requirements- Fishing gear protection, dropped objects
� Drilling methods- Suction of drill cuttings, cement suction, drill cutting injection
© Det Norske Veritas AS. All rights reserved.
September 2011
7
Foundations
� Installed before main manifold so reduced weight
� Allow drilling taking place (Normally one season prior to manifold installation)
� Each skirt (or mini pile) can be sucked down individually to adjust elevation
� Supports weight of manifold or template and anchors it in place on the seabed
Template Foundations with skirts or mini-suction piles :
Aker Kværner Subsea
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September 2011
8
Fixed Template – Production Guidebase
Aker Kværner Subsea
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September 2011
9
Modular Manifold / Template
TRIPLEPORCH
MUDMAT
CENTREPILE
EWA
HOGS
DRILL CUTINJECTION
PGBPGB
MANIFOLD PIG LOOPMODULE
PIG LOOPPORCH
CENTRESECTION
MANIFOLD ROOFPROTECTION
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September 2011
10
Single Suction Piles
Key features :� Supports vertical and horizontal loads
on the manifold� Also used as anchor foundations for
FPSO or Semi-submersible moorings� Installed partially by self weight and then
by ROV deployed pump� Can be recovered by reverse pumping� May be designed so that orientation is not
critical during installation
© Det Norske Veritas AS. All rights reserved.
September 2011
13
Manifold functionsISO 13628-1:
“A manifold is a system of headers, branched piping and valves used to gather produced fluids or to distribute injected fluids. (ISO 13628-1). The manifold should provide sufficient piping, valves and flow controls to safely gather produced fluids or distribute injected fluids such as gas, water or chemicals”.
Purpose of Manifold
� The purpose of the manifold is to ”commingle” the fluid flow and to proved isolation where required.
� The Manifold Module provides the interface between the production pipeline, flowline and well.
� Pipelines or flexibles normally interconnect the manifold.
� Collecting produced fluids from individual subsea wells.
� Distributing production fluids, inject gas, inject chemicals and control fluids.
� Distribute the electrical and hydraulic system.
� Several XT can be connected to the manifold.
� Satellite modules (if required) will be connected to the manifold via a flow line.
© Det Norske Veritas AS. All rights reserved.
September 2011
14
Templates and Manifolds
� In Norwegian terms the manifold is often referred to as the “Template/Manifold”, since the manifold is an integral part of the template.
Retrievable Manifold
Aker Kvaerner Subsea, Kristin project
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September 2011
15
Manifold Piping
6” Branch Line To/From Well
Remote Actuated Valves
10 ” Main Header
5 1/8” Branch Valves
Pigging Loop Isolation Valve
2” CI Valves
ROV Panel
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September 2011
20
Gemini System Integration Test (SIT)
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September 2011
21
Manifold System Integration Testing (SIT)
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September 2011
22
Manifold and distribution System
Manifold Centers w/o template function
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