Multiphase flow line and Trunk line Basic Hydraulics and Flow Assurance | EveryEng

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Self-paced Beginner

Multiphase flow line and Trunk line Basic Hydraulics and Flow Assurance

4.2(13)

9 enrolled

1786 views

$ 30

106 min

Anytime

English

1786 views

Sanjay Chakraborty

Oil & Gas Upstream

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Foundational Learning
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Why enroll

Participants should join this course to gain a strong practical understanding of how fluids behave and travel from the wellhead to the plant inlet separator—knowledge essential for anyone working in upstream or midstream oil and gas operations. The course bridges theory with real field challenges, enabling learners to perform basic hydraulic calculations, interpret multiphase flow patterns, and anticipate flow-assurance risks such as slugging, wax, and hydrates. By attending, participants will enhance their problem-solving skills, improve design and troubleshooting capability, and build confidence in evaluating flowline and trunkline performance in real operating environments.

Your instructor

Sanjay Chakraborty

Lead Process Engineer

United Arab Emirates

Is this course for you?

You should take this if

You work in Oil & Gas Upstream
You're a Flow Assurance / Petroleum Technology professional
You want to build skills in Engineering & Design
You prefer self-paced learning you can revisit

You should skip if

You need a different specialisation outside Flow Assurance
You need live interaction with an instructor

Course details

Course Objective:

This course aims to equip learners with a foundational understanding of how fluids travel from the wellhead to the plant inlet separator, focusing on the essential principles of hydraulics and flow assurance. Participants will learn to interpret flow behaviour in wellhead and pipeline systems, perform basic hydraulic calculations, and evaluate pressure losses, liquid loading, and multiphase flow characteristics. The course also introduces key flow-assurance challenges such as slugging, wax deposition, hydrates, and sand production, along with mitigation strategies. By the end, learners will be able to analyze and troubleshoot flowline and trunkline performance confidently using practical engineering approaches.

Subject Description:

This course provides a comprehensive overview of the fluid journey from the wellhead to the inlet separator of an oil and gas processing facility. It explains the fundamentals of wellhead systems, flowlines, trunklines, and inlet separation, emphasizing how pressure, temperature, and multiphase flow dynamics influence system performance. Learners will explore basic hydraulic concepts including frictional pressure drop, elevation effects, and flow regimes, supported by simplified calculations. The subject also covers essential flow-assurance topics such as paraffin, hydrates, corrosion, and transient behaviour. Practical examples and field-based insights ensure relevance for engineers involved in upstream and midstream production operations.

Course suitable for

Key topics covered

Introduction
Basic hydraulics and flow assurance
Beggs and Brill and Oil gas correlation
Slugs ?
Why Slugs form?
Why Slugs matter?
Corrosion
Onset Pressure

Course content

The course is readily available, allowing learners to start and complete it at their own pace.

3 lectures1 hr 46 min

Course Overview & Introduction
9 min
Basic Hydraulic and Flow Assurance
67 min
Slug Key Characteristics & Decision tree structure
30 min

Opportunities that await you!

Skills & tools you'll gain

Engineering & Design

Career opportunities

✎ Where this fits — what comes before, what comes next

Course Attachments

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Questions and Answers

Q: You're reviewing a P&ID during an HSE walkdown and search "multiphase flowline P&ID inlet separator symbol meaning". The drawing shows a flowline entering a horizontal separator with a single solid line and no phase annotation. The line list calls it a 10" MP line. What does the solid line most defensibly imply on this drawing set?

A: The discriminator here is the P&ID convention boundary. At P&ID level, a solid line typically marks process hydrocarbon service without embedding flow regime assumptions; phase behavior is handled in line list notes and design documents, not the symbol itself. Treating it as single-phase or liquid-continuous would import an assumption that doesn't belong on this drawing layer.

Q: During design review you google "API 14E erosional velocity multiphase flowline rationale". The client asks why API 14E velocity limits are being applied to a short wellhead-to-separator flowline. What's the defensible justification?

A: The hard boundary is erosion onset, not regulatory coverage. API 14E exists to limit metal loss driven by particle impact and droplet impingement in multiphase flow; it's a screening tool, not a slugging control or a legal shield under COMAH.

Q: On site for pre-commissioning you search "flowline hydrotest vs dewatering sequence multiphase pipeline". The trunkline has been hydrotested and is full of treated water. What sequence best reduces later slugging and hydrate risk?

A: The threshold is free water presence. Bulk removal first limits liquid holdup, and drying to a defined dewpoint before hydrocarbons avoids hydrate conditions; reversing the order traps water and builds slug volume.

Q: Operations call after you search "multiphase flowline pressure drop increases with lower rate". Throughput is reduced 30% and upstream pressure rises. What's the most likely mechanism and response?

A: The tipping point is holdup, not friction. At lower velocities, liquid accumulates in low spots, raising hydrostatic head and upstream pressure; terrain slugging assessment comes before aggressive valve moves or chemical shots.