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Anders E. Husby

September 2011

MEK4450 Templates and Manifolds



© Det Norske Veritas AS. All rights reserved.

September 2011

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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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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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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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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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