This Document contains various methods adopted currently for repair and replacement of subsea pipelinesFull description
Deep sea operation service
Subsea 101 Rev3Full description
Issues and Solutions
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
