MEK4450. Templates & Manifolds. 29 August Templates and Manifolds. This module will cover:

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1 29 MEK Templates and Manifolds Templates & Manifolds This module will cover: Applicable Codes and Standards Templates - Purpose of a template Manifolds - Purpose of a manifold Foundations 2 1

2 29 Goal Differentiate different methods and understand reason for choosing different design 3 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 Steel structure: NS 3472 (Design methods and utilization of material, does not cover loads) - NORSOK U-001 (Dropped object) - ASME B ASME B DNV-OS-F101 - BS8010 Part 3 - DNV Rules for planning and Execution of Marine Operation - New Standard proposed: ISO Structures and Manifolds 4 2

3 29 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 5 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 6 3

4 29 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 Aker Solutions 7 Fixed Template Production Guidebase Aker Solutions 8 4

5 29 Modular Manifold / Template MANIFOLD ROOF PROTECTION MANIFOLD PIG LOOP MODULE PIG LOOP PORCH CENTRE SECTION PGB DRILL CUT INJECTION PGB TRIPLE PORCH HOGS MUDMAT EWA CENTRE PILE 9 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 10 5

6 29 Protection Structures 11 Hinged Manifold / Template 12 6

7 29 Manifold functions ISO : A manifold is a system of headers, branched piping and valves used to gather produced fluids or to distribute injected fluids. (ISO ). 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. 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 Kværner Subsea, Kristin project 15 7

8 29 Manifold Piping 6 Branch Line To/From Well 5 1/8 Branch Valves Remote Actuated Valves 10 Main Header 2 CI Valves ROV Panel Pigging Loop Isolation Valve 16 Manifold 17 8

9 29 Manifold 18 Manifold Piping 19 9

10 29 Manifold Deployment 20 Gemini 21 10

11 29 Gemini System Integration Test (SIT) 22 Manifold System Integration Testing (SIT) 23 11

12 29 Manifold and distribution System Manifold Centers w/o template function 24 Foundations From ISO Riser joint 2. Applied moments 3. Environmental (current, wave action, snag loads, etc.) 4. Flowline connection 5. Soil reaction 6. Thermal 25 12

13 29 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 26 Foundations Two main methods for foundation. Example of method 1 Example of method

14 29 Cluster Manifold GE Oil & GAS : KIZOMBA manifold & foundation 28 Template Manifold GE Oil & GAS : SKARV manifold & foundation 29 14

15 29 Template Manifold GE Oil & GAS : Snøhvit manifold & foundation 30 Safeguarding life, property and the environment