Improvement Of Sacrificial Anode Life For Internal Surface Of Process Vessels In Upstream of Oil & Gas Facilities www.kockw.com Saleh Al-Sulaiman Hasan Sabri Mohammed Abdul-Fatah Eugene D’souza (Presenter) Inspection and Corrosion Team, Kuwait Oil Company
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Paper 12- Improvement of Sacrificial Anode Life for Internal Surface of Process Vessels in Upstr
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Improvement Of Sacrificial Anode Life For
Internal Surface Of Process Vessels
In Upstream of
Oil & Gas Facilities
www.kockw.com
Saleh Al-Sulaiman
Hasan Sabri
Mohammed Abdul-Fatah
Eugene D’souza (Presenter)
Inspection and Corrosion Team,
Kuwait Oil Company
2
Presentation Overview
Introduction
Gathering Center Process Overview
Types Of Separators
Separator Construction and Operational Details
Comparison between Separators
Case Study
Results
Conclusions
3
The Kuwait Oil Company is one of the major oil producing
companies in the world.
Company mainly executes exploration, drilling, and
extraction of oil and gas within the State of Kuwait.
Oil produced from several oil fields including Burgan,
Ahmadi and Magwa.
Operates 21 Gathering Centers and 4 Booster Stations.
Introduction
4
Oil Fields in Kuwait
5
Gathering Center Satellite Image
6
Serves as a collection (Gathering) location of Crude Oil from wells
Separates the Crude Oil, Gas and Water.
Facilitates Oil Wells Testing
Provides intermediate storage for the Crude Oil prior to pumping to
the Tank Farms
Compresses Tank vapors for condensate recovery
Transports the gas for further compression at the Booster Stations.
Gathering Center (GC)
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Gathering Center Process in Brief
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Wet Separators
Two Phase Separators Three Phase Separators
General Arrangement Drawings
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Operation and function of an Two Phase Separators
The function of a two phase Separator is to separate the associated gas and liquid (oil & water).
The liquid leaves at the bottom of the vessel and gas from top through a mist eliminator to remove small liquid droplets from the gas.
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Operation and function of an Three Phase Separators
The function of a three phase Separator is to separate the associated crude, gas and oily water.
It works on the principle that the three components have different densities allowing the gas being on top, the crude being in the middle and water remains at bottom.
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Comparison between of Two & Three Phase Separator
Two Phase Separator Three Phase Separator
1 The function of a 2-phase
Separator is to separate the
associated gas and liquid (oil &
water)
The function of a 3-phase Separator is to
separate the associated crude , gas and
oily water
2 The liquid leaves at the bottom of the vessel and gas from top through a mist eliminator to remove small liquid droplets from the gas.
It works on the principle that the three components have different densities allowing the gas being on top, the crude being in the middle and water remains at bottom.
3 Oily water resistivity above 1000 ohm-cm.
Oily Water resistivity between 1 to 7 ohm-cm.
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A Case study was performed on a three phase separator vessel which
had been operated for less than year (six months) and found with
sacrificial anodes consumption up to average 85%. The CP design for
this vessel was prepared considering 10 years of service life.
Case Study
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Separator Vessel Design Details
Diameter ID 3,048mm (10 ft)
Length 15,420mm (50 ft)
Heads 2:1 Semi-Ellipsodial
Orientation Horizontal (Saddle mounted)
Process Fluid Crude oil/ Saline water/ Hydrocarbon vapour