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X-mas Trees and Wellheads: Operation and Testing (PRE26)

  • 7-10 October 20244 daysVienna, AustriaCourse Fee: 3100 EUR + VAT


Wellheads and X-mas trees are very important and critical components of any well. To monitor, test and repair any failed component is critical for the safe operation of the well and will boost production and keep the well out of the ‘inactive wells’ list.

The main goals of this course are to:
  • Revisit the importance of wellheads and X-mas trees and to analyse all the problems that may affect well head and X-mas trees integrity and well integrity as a whole
  • Understand how critical good cementations are to avoid future well heads and well integrity problems
  • Understand SAP pressures, their origin and their impact on safety and well life cycle

Course Level: Skill
Instructor: Antonio Abreu

Designed for you, if you are...

  • A field services or operations foreman
  • A petroleum or production engineer
  • A drilling or completion engineer
  • Oil field technical staff

How we build your confidence

  • Discussing and analysing how wellheads and Xmas trees have a major role in achieving well integrity
  • Correlation between best practices for well construction and wellheads integrity, and how they can affect safety and well production issues
  • Focus on SAP pressures registered at wellheads, their causes and mitigation
  • Videos, exercises and case studies will be presented

The benefits from attending

By the end of the course you will feel confident to:

  • Develop the knowledge relationship between surface (wellheads) and downhole
  • Investigate leaks and identify the cause of leaks
  • Determine tubing pressures (based on depth of perfs, density of fluid and BHFP)
  • Investigate SAP pressures based on well pressure monitoring using 2 and 3 pen recorders
  • Explain influence of corrosion models on MAASP pressures and on Well Life Cycle


Day 1: Introduction: Wellheads and X-mas Trees
  • Operational safety
  • Reservoirs, wells and wellheads
  • Problems caused by poor cement jobs
  • Well construction and primary cement jobs
  • Construction of a well from casings to wellhead
  • Productivity index calculated at wellhead
  • Wellhead main functions
  • Practical calculations to determine tubing pressures based on several factors
  • Wellhead classifications
  • API specification 6A
  • Basic components of a wellhead
  • Wellhead installation movie
  • Casing head / casing head function
  • Investigation and discussion of SAP case 1
  • Casing spool / casing spool function
  • Casing hangers
  • Tubing heads and tubing hangers
  • Investigation and discussion of SAP case 2

Day 2: Continuation of Tubing Hangers
  • Casing spool / casing spool function
  • Casing hangers
  • Tubing heads and tubing hangers
  • Investigation and discussion of SAP case 2
  • Tubing head adapters
  • Typical X-mas tree components
  • Fix chokes and adjustable chokes
  • Flanges (6B and 6BX types)
  • Seals and gaskets
  • Unitised wellhead
  • The BOP

Day 3: X-mas Tree Installation, Pressure Testing
  • X-mas tree installation
  • Wellhead repairs
  • Hydraulic and pneumatic actuators
  • Investigation and discussion of SAP case 3
  • Casing hangers and well pressure control
  • Common pack offs and secondary seals
  • Tubing hangers (cross sections)
  • Tests and leak path determination
  • Unitised wellheads
  • Basic rules for pressure testing wellheads
  • Test schematics of wellheads
  • Movie: testing wellhead
  • Example of sealing cavity with sealant
  • Basic requirements of a well completion
  • Casing string types
  • Liners, liner hangers and tie back liners
  • Effects of pressure in “b” and “c” annulus

Day 4: WellHead Repairs, Well Integrity
  • Wellhead repairs and casing repairs
  • Surface casing corrosion
  • Burst and collapse pressure decline with time
  • MAASP calculations for annulus A
  • Short introduction on material selection
  • Corrosion monitoring tools
  • Cathodic protection
  • Well integrity: safety and operational aspects
  • Constructing a well with integrity
  • Well integrity issues
  • The important of SC-SSSV
  • Wellhead components and well integrity assurance guidelines
  • Risk management
  • WIMS: well integrity management system
  • Industry standards and guidelines
  • Well integrity drivers and implementation
  • Well integrity envelope
  • Well integrity, annular pressures and well head monitoring
  • SAP wells
  • Investigation and discussion of SAP case 4

Customer Feedback

"Good animation and explanation video." - Sr. Completion Engineer at Qatar Energy

"I liked the presentation and accommodating instructor." - Wellhead Technician at Qatar Energy

"Excellent material hand book, can be used as quick reference guide at work." - Operation Foreman at ADCO

"Course and tutor skills are excellent." - Operation Foreman at ADCO

"This course should be a refresher every year for everyone." - Field Services Foreman at ADCO

"Subject and presentation, the whole course was interesting due to matching with my job." - Foreman at ADCO



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