Course Overview

Workover is performed after the initial completion to re-establish commercial production or injection, repair of a mechanical problem in the well, or plug and abandon the well. Workover operations are usually initiated as hydrocarbon production rates decline substantially. Undesired fluid production could be the result of a poor primary cement job or water / gas coning. These workovers typically involve a remedial cement job to control the unwanted water / gas production. Well completion is performed at the completion of drilling operations to establish initial production from or injection into a well. Procedures of completion will vary depending on the completion type and the area.

Course Objectives

By the end of this training, participants will be able to:

• Plan, design, manage and execute completion operation
• Improve the overall operational performance during workover operations
• Select or recommend completion equipment for given field conditions and applications
• Select the most commonly used downhole tools and explain their function

Who Should Attend?

• Production Technologists
• Production Engineers
• Operations Engineers
• Field Technicians
• Workover Engineers

Course Contents

Module (01) Types of Completions 

• Introduction
• Wellhead Configuration
• Functional Requirements of a Completion
• Completion Equipment
• Flow Control Devices
• Packers
• Tubing
• Circulation Devices
• Expansion Joints
• Sub-Surface Safety Valves
• Christmas Trees and It’s Types
• Surface Equipment

 Module (02) Reasons for Workovers and Well Preparation 

• Formation Damage
• Sand Control
• Acidizing
• Corrosion
• Hydraulic Fracturing
• Mechanical Problems
• Well Preparations for Work Over
• Tree and BOP Removal / Installation

 Module (03) Overview of Surface and Subsurface Wellbore Equipment and Procedures 

• Blowout Preventer Stacks and Components
• Workstring and Production Tubing
• Auxiliary Well Control Equipment
• Plugs & Packers
• Verification of Shut-in
• Monitoring and Recording During Shut-in
• Preparing for Well Entry
• Wireline Open Hole Operations
• Contingency Procedure for Wireline
• Contingency Procedures for Coiled Tubing
• Contingency Procedure for Coiled tubing

 Module (04) Barriers, Completion and Workover Fluids  

• Philosophy and Operation of Barrier Systems
• Levels of Barriers
• Types of Barriers
• Barrier Management
• Influx Detection
• Gas Characteristics and Behavior
• Pressure and Volume Relationship (Boyles Law)
• Workover / Completion Fluid Functions
• Liquids and Fluid Properties
• Testing of Downhole Completion Equipment
• Testing of Well Control Equipment Connections
• Well Control Drills

 Module (05) Kick Causes, Warning Signs, Kill Methods, Risk Awareness & Organizing a Well Control Operation, Natural Flowing & Artificial Well Work Over Programs 

• Well Shut-in and Well Kill Considerations
• Well Control Problems
• Objective of Well Control Techniques
• Bullheading
• Volumetric Method
• Lube and Bleed
• Forward Circulation
• Driller’s Method
• Reverse Circulation
• Handling Kill Problems
• Potential Impacts of a Well Control Event
• Well Integrity
• Pressure Control Equipment / Barrier Envelope Considerations
• Personnel Assignment
• Plan Responses to Anticipated Well Control Scenarios
• Blockages& Trapped Pressure in Tubing / Wellbore
• Blockage & Restricted Access in Tubing / Wellbore
• Hydrates
• H2S considerations
• Natural Flowing and Artificial Well Work Over Programs