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Transcript of Dnv Manifold
8/10/2019 Dnv Manifold
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Anders E. Husby
September 2011
MEK4450 Templates and Manifolds
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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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Goal
Differentiate different methods and understand reason for choosing differentdesign
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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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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
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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
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Foundations
Installed before main manifold so reducedweight
Allow drilling taking place (Normally oneseason prior to manifold installation)
Each skirt (or mini pile) can be suckeddown individually to adjust elevation
Supports weight of manifold or templateand anchors it in place on the seabed
Template Foundations with skirts or mini-suction piles :
Aker Kværner Subsea
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Fixed Template – Production Guidebase
Aker Kværner Subsea
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Modular Manifold / Template
TRIPLEPORCH
MUDMAT
CENTRE
PILE
EWA
HOGS
DRILL CUTINJECTION
PGBPGB
MANIFOLD PIG LOOPMODULE
PIG LOOPPORCH
CENTRESECTION
MANIFOLD ROOFPROTECTION
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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 notcritical during installation
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Protection Structures
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Hinged Manifold / Template
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13
Manifold functions
ISO 13628-1:
“A manifold is a system of headers, branched piping and valves used to gather produced fluids or todistribute injected fluids. (ISO 13628-1). The manifold should provide sufficient piping, valves and flowcontrols 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.
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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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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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Manifold
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Manifold
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Manifold Deployment
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Gemini
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Manifold System Integration Testing (SIT)
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Manifold and distribution System
Manifold Centers w/otemplate function
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Safeguarding life, property
and the environment
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