Subsea Introduction

(1)

Subsea Technology Introduction

Oddmund Lervik

Customer Training Advisor

CUSTOMER SUPPORT

ÅGOTNES (BERGEN)

Subsea Technology Introduction

Oddmund Lervik

Customer Training Advisor

CUSTOMER SUPPORT

(2)

Goals

Give a basic understanding of the total system

(3)

Agenda / content

Page Chapter Description

4 2 Subsea introduction

5 4 Oil and gas production general 10 5 The vessels and platforms 12 6 Remote operated vehicle 13 7 Subsea systems development 13 8 Subsea system overview 16 9 Field layout

16 10 Subsea structures 20 11 Wellhead system 26 12 Completion system 29 13 Workover system

31 14 Bridge connections / bridging 33 15 Tie-in and connection systems 35 16 Production control system 37 17 Subsea processing

(4)

SUBSEA or SURFACE?

The fields formation

Economy

(5)

Production platforms

NORWAY – Concrete platforms

Statfjord-field

NORWAY – FPSO Aasgard A-field

NORWAY – Jacket Gulftide platform on the Ekofisk-field in 1971

Jack-up

(6)

(7)

The vessels

(8)

(9)

(10)

(11)

ROV Remote Operated Vehicle

(12)

Subsea system overview

(13)

Structures/Template and Manifold

permanent installed equipment

Workover system Tools

Completion system (XT)

Intervention system Tie-in and connection of

Umbilicals and flowlines

Production control system

(14)

(15)

Field layout

(16)

(17)

(18)

(19)

On Template - Cluster

(20)

Subsea structures

(21)

Fixed template (Otter - UK)

Rig installable template (HOST)

8 slot template (Ormen-Lange - Norway)

(22)

1991 SSP Statfjord Satellite

Project (Norway) 1995 NORNE Project (Norway) 1996 LUFENG HOST (China) rig installable

2002 OTTER - fixed HOST

(UK) 2003 SVAN – Integrated template (Norway) 2005 ORMENLANGE (Norway)

(23)

Structure development

Field Length Width Height Weight

1991 Statfjord Satellites 39,0 m 29,5 m 10,3 m 680 t

1995 Norne Over-trawl 25,0 m 19,4 m 9,3 m 450 t

1996 YME - Hinged Over Subsea Template (HOST) with protection structure

21,8 m 20,3 m 8,8 m 225 t

2002 Otter fixed HOST 12 m 20 m 2 m + s.

anchors 40 t

2003 SVAN integrated 36 m 36 m 9 m 126 t

2005 Ormenlange 46 m 44 m 18 m 1150 t

(24)

Snorre A - subsea

(25)

The rig installable template HOST

(26)

GL = Guide Line

Guide Lines are wires attached to the Guide Posts on the template. The wires are tension by winches on the rig. The wires help to “guide” the equipment that will be installed from the rig down to the template

And

GLL = Guide Lineless

Guide lineless is normally used for deep-water installation. A guidance funnel or a plate on the XT provides guidance on to the structure. GLL systems are used from apr. 500m water dept.

(27)

GLL - HOST

Installation methods

GL - HOST

(28)

MANIFOLD

Flowline Umbilical

(29)

Protection

Falling objects

Over-trawl-able

Manifold protection 19

(30)

The HOST story

(31)

Well Head system

(32)

Blowout preventer BOP

(33)

Drilling and Wellheads

UWD 15 Wellhead

– 15000 psi system

UWD II

– 10000 psi system

(34)

Seal assy. Casing hg. WH housing rt. Vetco H4 profil 18 3/4” WH 30” conductor housing

Anti rotation key

(35)

PGB

with guideposts

PGB

with guideposts

(36)

(37)

Completion System

(38)

26

a GL, VXT from 1991 - Statoil a GLL, VXT from 2000 – the Girasoll project - ELF a GLL, VXT from 2005 - BP

(39)

Vertical XT

– Production tubing-hanger is landed under XT in the wellhead

– Valves in the vertical bore

– 5” tubing Actuator Wing valve XT WellHead PMV

Tubing / oil flow Tubing Hanger

(40)

Horizontal XT

HXT

– Production tubing hanger is landed on top of the HXT

– Valves are in the horizontal bore

– 7” tubing

(41)

Workover System

(42)

Vertical XT Workover System

Workover System

1 Control System - HPU - Umbilical winch - Control panel - ESD system 2 Riser system - Surface Tree - Riser - XTRT - Landingstring 28

(43)

IWOCSystem XT mode HXT HXTRT DP Umbilical IWOCSystem LS mode BOP LS _WOR Marine riser SFT 29

(44)

XT installation

(45)

Bridge connection or bridging

(46)

Bridge connections

CB = Choke Bridge

FCM = Flow Control Module (Statoil)

Horizontal stroking connector

Well jumper

Choke Module

Choke valve on FCM

(47)

HXT with FCM

FCM

HXT

(48)

Horizontal Stroking

Connector

Horizontal Stroking

Connector

(49)

Well jumper

(50)

Choke

Choke module Choke

(51)

Before choking - well no. 1 – 110 bar at 100% well no. 2 – 105 bar at 100%

After choking – well no. 1 – 95 bar at 85% well no. 2 – 95 bar at 90%

Production header

After choking – well no. 4 – 95 bar at 95% well no. 3 – 95 bar at 100%

Before choking - well no. 4 - 100 bar at 100% well no. 3 – 95 bar at 100%

(52)

ROV working

ROV opptak 1

(53)

Tie-in & Intervention system

(54)

Tie-in & intervention

Description

– This system is normally utilized with smaller vessels

– Hook up of connections between well and production unit or installation to installation

Equipment KOSCON family

– Wire deployed tools

– ROV assisted tools

(55)

KOSCON Family

2 ROVCON 1 UTIS _{3 STABCON} 4 SPOOLCON 5 VECON 6 FLYCON 33

(56)

Production control system

(57)

Production control system

Description

– Control of wells – Transfer to process

Equipment

– Platform unit – Umbilical – electrical/hydraulic – Production pipe – SCM – Distribution on manifold 34

(58)

Control system - no production

SUBSEA “A” SCM XT Valve OS Manifold Electric / signal

Hydraulic pressure 207 bar Oil production

Well

Flowline Umbilical

Hydraulic pressure 0 bar

HOST FCM

or CB

(59)

Subsea Processing

(60)

Subsea Well Intervention

(61)

(62)

(63)