Well heads 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 wel 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 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
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 Duration: 4 days Instructor: Antonio Abreu, Luis Remisio, Cipriano Costa
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 well heads and Xmas trees have a major role in achieving well integrity
Correlation between best practices for well construction and well heads integrity, and how they can affect safety and well production issues
Focus on SAP pressures registered at well heads, 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 (well heads) 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
Topics
Day 1: 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
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 well head
The BOP
Day 3: 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
Day 4: 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