« Back to course list

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


    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




    HOT Engineering GmbH

    Parkstrasse 6
    8700 Leoben, Austria

    HOT Engineering Vienna Office

    Herrengasse 1-3, Floor 2
    1010 Vienna, Austria
    Tel.: +43 3842 43053-0
    Fax: +43 3842 43053-1
    E-Mail: hot@hoteng.com

    HOT Reservoir Solutions GmbH HOT Microfluidics GmbH

    Am Stollen 19
    38640 Goslar, Germany

    Tel.: +49 151 42440 739
    Fax: +43 3842 430 53-1
    E-Mail: hotrs@reservoirsolutions.com
    E-Mail: microfluidics@hoteng.com

    HOT Middle East

    138 Fatimah Bint Mubarak Street
    Al Yasat Tower, P.O. Box: 97
    Abu Dhabi, UAE

    Tel.: +971 2 672 0730
    Fax: +971 2 674 2422
    E-Mail: me@hoteng.com

    HOT Engineering Libyan Branch

    Essyahia City
    Tripoli, Libya

    E-Mail: libya@hoteng.com

    HOT Engineering GmbH   Tel: +43 3842 43 0 53-0   Fax +43 3842 43 0 53-1   hot@hoteng.com