MEK4450 DNV 05 Templates and Manifolds.ppt - …€¦ · 29 August 2012 1 August 2012 MEK4450 ... - ASME B 31.3 - ASME B 31.8 ... MEK4450_DNV_05_Templates_and_Manifolds.ppt [Compatibility

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August 2012

MEK4450

05 Templates and Manifolds

© Det Norske Veritas AS. All rights reserved.

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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 different design


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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

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

Template Foundations with skirts or mini-suction piles :

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

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Aker Solutions


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Fixed Template – Production Guidebase

Aker Solutions

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Modular Manifold / Template

TRIPLEPORCH

MUDMAT

CENTREPILE

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 not critical 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 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.

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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 Kværner 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 Piping

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Manifold Deployment


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Gemini

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Gemini System Integration Test (SIT)


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Manifold System Integration Testing (SIT)

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Manifold and distribution System

Manifold Centers w/o template function


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Foundations

From ISO 13628-1

1. Riser joint

2. Applied moments

3. Environmental (current, wave action, snag loads, etc.)

4. Flowline connection

5. Soil reaction

6. Thermal

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Foundations

The two main methods used are:

1. The 30” suspension joint are suspended by drilling rig during cementing. Common for satellites.

2. The 30” suspension joint is hanged of in a drilling guide base or in a template structure.

Soil condition, external loading capacity to wellhead and the installed infrastructure are selection criteria for the method. The load can be illustrated with trawl protection, riser loads and drilling loads.

Norwegian waters will typically ask for solutions that is not restricting to fishing activities. This will result in need for over trawlable protection structures


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Foundations

Two main methods for foundation.

Example of method 1 Example of method 2

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Cluster Manifold

GE Oil & GAS : KIZOMBA manifold & foundation


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Template Manifold

GE Oil & GAS : SKARV manifold & foundation

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Template Manifold

GE Oil & GAS : Snøhvit manifold & foundation


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Safeguarding life, property and the environment

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Documents

MEK4450 DNV 05 Templates and Manifolds.ppt - …€¦ · 29 August 2012 1 August 2012 MEK4450 ... - ASME B 31.3 - ASME B 31.8 ... MEK4450_DNV_05_Templates_and_Manifolds.ppt [Compatibility