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X-mas Trees and Well Heads: Operation and Testing (PRE26)

  • 3-6 November 20194 daysDubai, UAECourse Fee: 3990 USDCourse fee is NET. Taxes will be applicable.


X-mas Trees and Well Heads are critical parts of any oil & gas well.
They control the pressures in the casings and production tubing, regulate the production rates and are very important barriers in case of leaks.

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

  • The course will be presented using properly designed slides, some with animation and several videos on relevant issues
  • Teaching methods include also calculations on related issues

The benefits from attending

The main goals of this course are:
  • To revisit the importance of well heads 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
  • To understand how critical good cementations are to avoid future well heads and well integrity problems
  • To understand SAP pressures, their origin and their impact on safety and well life cycle

By the end of this training course, participants will learn to:
  • Develop the knowledge relationship between surface (well heads) and downhole
  • Investigate leaks and identify cause of leak
  • 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


Introduction: Well Heads and X-mas Trees
  • Operational safety
  • Reservoirs, wells and well heads
  • Problems caused by poor cement jobs
  • Well construction and primary cement jobs
  • Construction of a well from casings to well head
  • Productivity index calculated at well head
  • Well head main functions
  • Practical calculations to determine tubing pressures based on several factors
  • Well head classifications
  • API specification 6A
  • Basic components of a well head
  • Well head 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
  • Continuation of tubing hangers
  • Tubing head adapters
  • Typical X-mas tree components
  • Fix chokes and adjustable chokes
  • Flanges (6B and 6BX types)
  • Seals and gaskets
  • Unitised well head
  • The BOP

X-mas Tree Installation, Pressure Testing
  • X-mas tree installation
  • Well head 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 well heads
  • Basic rules for pressure testing well heads
  • Test schematics of well heads
  • Movie: testing well head
  • 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

Well Head Repairs, Well Integrity
  • Well head 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
  • Well head 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
  • Investigation and discussion of SAP case 4
  • SAP wells

Customer Feedback

"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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