Download L02 - FLOW ASSURANCE PDF

TitleL02 - FLOW ASSURANCE
TagsPipe (Fluid Conveyance) Electrical Connector Phase (Matter) Thermal Insulation Subsea (Technology)
File Size3.3 MB
Total Pages27
Table of Contents
                            TORE Sand Removal
                        
Document Text Contents
Page 2

BASIC PRINCIPLES OF SUBSEA PRODUCTION - FLOW ASSURANCE ISSUES

SEPARATOR

PLATFORM OR
FLOATER

GAS

RISER BASE

FLOWLIN ES

SUPPLY LINES

DIS TRIBU TE
CHEMICALS

TREE

2 - 100 km

SEA BED

1
0

0
0

-
1

0
0

0
0

m

OIL

WATER

5
0

-
2

0
0

0
m

RISER
PROCESS
FACILITIES

FLOW ASSURANCE

1) HYDRAULICS - Is there enough energy in the
flow to reach the processing host?

2) CORROSIVE COMPONENTS in the oil i.e.. H2S
and CO2 - It can be corrected by chemical injection.

3) Is there any WAX in the oil that may block the
lines on cooling.

4) Combinations of Gas and Water may form
HYDRATES which block the line.

Page 13

DIPSIS - SUBSEA WATER SEPARATION AND RE-INJECTION

Diagrammatic Representation

SEPARATOR PUMPS

UMBILICAL

SUBSEA CONTROL
SYSTEM

ELECTRIC POWER
CONNECTOR

Page 14

WAX DEPOSITION
• 10% to 20% of Crudes are considered Waxy

• The Formation of Wax can completely Block Flow

• Waxy Crude is characterised by one or more of the following :-

- Cloud Temperature

- Pour Point Temperature

- Inversion Temperature (melting)

• Wax Deposition Prediction

- By Models and Predictions based on Fluid Properties

WAX PREVENTION
• Insulation to Maintain Temperature

• Scraper Pigging

• Heating using Steam or Electricity

• Hot Oil Flushing

• Chemical Injection of Wax Inhibitors

Wax Plug

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