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Questions and Answers
What is the main purpose of using wellhead chokes?
What is the main purpose of using wellhead chokes?
To limit production rates, protect surface equipment, avoid sand problems, and control flow rate.
What is the difference between positive (fixed) chokes and adjustable chokes?
What is the difference between positive (fixed) chokes and adjustable chokes?
Positive (fixed) chokes have a fixed orifice, while adjustable chokes have a variable orifice.
How can the flowing bottom-hole pressure be determined for a given wellhead pressure?
How can the flowing bottom-hole pressure be determined for a given wellhead pressure?
By calculating pressure loss in the tubing.
What is the significance of the orifice size in flow control devices?
What is the significance of the orifice size in flow control devices?
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What is the relation between orifice size and flow rate when the pressure drop across a valve is fixed?
What is the relation between orifice size and flow rate when the pressure drop across a valve is fixed?
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What is the main purpose of a backpressure control valve in pressure control?
What is the main purpose of a backpressure control valve in pressure control?
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When might it be necessary to add gas to the vessel for pressure control?
When might it be necessary to add gas to the vessel for pressure control?
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How does a level controller maintain the gas/liquid or oil/water interface?
How does a level controller maintain the gas/liquid or oil/water interface?
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What are the two common forms of level controllers mentioned in the text?
What are the two common forms of level controllers mentioned in the text?
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What does a pressure controller sense in the vapor space of the pressure vessel or tank?
What does a pressure controller sense in the vapor space of the pressure vessel or tank?
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