1. CHOKE MANIFOLD
Nwogu, U.D.

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Did you know?
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• Adjustable choke and dynamic sealing
• When choke arrives offshore
• When should you check the adjustable choke?
• What to look out for on the adjustable
• Trouble shooting
• Feedback

3. ®Copyright Expro 2014 WELL FLOW MANAGEMENT
Did you know?
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“It is a good practice to turn the handle of the
adjustable stem during pressure testing whilst it
is under pressure”.
Why?

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Arrival offshore
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• Right size, pressure rating and
service type
• Number of turns to open/close valve
• No instrumentation until all rigged up

6. ®Copyright Expro 2014 WELL FLOW MANAGEMENT
When should you check the
adjustable choke?
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• Before starting operation
• When able after having any problem with the
adjustable choke.
• After flowing any solid through choke
• During shut-ins in preparation for the next flow

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What to look out for
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• Wear on cone
• Pitting and damage to seat and
threads
• Erosion on the internals

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Trouble shooting
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• Ucp is rising and Dcp is falling
• Ucp is dropping and Dcp is rising
• Both Ucp and Dcp are rising
• Both Ucp and Dcp are falling

10. ®Copyright Expro 2014 WELL FLOW MANAGEMENT
Feedback
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• Comments
• Responses
• Questions!!!