Subsea Introduction

Subsea Technology Introduction Oddmund Lervik Customer Training Advisor CUSTOMER SUPPORT ÅGOTNES (BERGEN)

Goals „ „

Give a basic understanding of the total system Give a basic introduction of equipment installation

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

38

18

Subsea well intervention

SUBSEA or SURFACE? „ „

The fields formation Economy

5

Production platforms

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

NORWAY – Concrete platforms Statfjord-field

Jack-up NORWAY – FPSO Aasgard A-field

8

9

The vessels

10 - 11

Rig video link

ROV Remote Operated Vehicle

12

Subsea system overview

Workover system Tools

Intervention system Tie-in and connection of Umbilicals and flowlines permanent installed equipment

Completion system (XT) permanent installed equipment

Production control system permanent installed equipment

Structures/Template and Manifold permanent installed equipment

14

15

Field layout

16

X

X

On Template - Cluster

X

Subsea structures

Fixed template (Otter - UK)

Rig installable template (HOST)

8 slot template (Ormen-Lange - Norway) 16

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)

17

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

9m

126 t

2005 Ormenlange

46 m

44 m

18 m

1150 t

17

Snorre A - subsea

X

The rig installable template HOST

18

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 deepwater 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.

18

Installation methods

GL - HOST

GLL - HOST

X

MANIFOLD

Umbilical

Flowline

19

Protection „ „

Falling objects Over-trawl-able

Manifold protection

19

The HOST story

Host video

Well Head system

Blowout preventer BOP

21

Drilling and Wellheads „

UWD 15 Wellhead – 15000 psi system

„

UWD II – 10000 psi system

„

equipment

Anti rotation key Vetco H4 profil 18 3/4” WH

WH housing rt. 30” conductor housing

Casing hg. Seal assy.

22

PGB with guideposts Drilling

Perforating link

Completion System XT

a GL, VXT from 1991 - Statoil

a GLL, VXT from 2000 – the Girasoll project - ELF

a GLL, VXT from 2005 - BP

a GL, HXT for - Statoil

a GL, HXT for - Hydro

a GLL, VXT from 2006 - Woodside

26

Vertical XT „

Vertical XT – Production tubing-hanger is landed under XT in the wellhead – Valves in the vertical bore – 5” tubing

Wing valve

XT PMV

Actuator Tubing Hanger

WellHead Tubing / oil flow 27

Horizontal XT „

HXT – Production tubing hanger is landed on top of the HXT – Valves are in the horizontal bore – 7” tubing

27

Workover System Tools

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

IWOCSystem XT mode

IWOCSystem LS mode

SFT

Marine riser Umbilical

LS

WOR

DP HXTRT HXT

BOP

29

XT installation

29

Bridge connection or bridging

Bridge connections „ „ „ „ „

CB = Choke Bridge FCM = Flow Control Module (Statoil) Horizontal stroking connector Well jumper Choke Module

Choke valve on FCM

30

HXT with FCM FCM HXT

30

Horizontal Stroking Connector

30

Well jumper

30

Choke Choke module

Choke

31

Before choking - well no. 1 – 110 bar at 100% After choking – well no. 1 – 95 bar at 85%

well no. 2 – 105 bar at 100% 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%

31

ROV working

ROV opptak 2

ROV opptak 1

Tie-in & Intervention system

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

32

KOSCON Family 1 UTIS

3 STABCON 4 SPOOLCON 5 VECON 6 FLYCON 2 ROVCON

33

Production control system

Production control system „

Description – Control of wells – Transfer to process

„

Equipment – – – – –

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

34

Control system - no production SUBSEA “A” OS CB

XT

or

FCM Umbilical

Valve

SCM

Flowline

Manifold

HOST

Well

Electric / signal Oil production Hydraulic pressure 207 bar Hydraulic pressure 0 bar

35

Subsea Processing

36

Subsea Well Intervention

37

Riser-less Light Well Intervention

Homer Simpson