Course description

The purpose of the course is to enable participants to understand the operational & engineering aspect of directional drilling. The course covers the fundamentals, design considerations and operational aspects of drilling a directional well. Additionally, the participants become familiar with the tools and techniques used in directional drilling such as survey instruments, bottom hole assemblies (BHA), motors, steerable motors and steerable rotary systems. Specific problems associated with directional drilling such as torque, drag, hole cleaning, logging and drill string component design are included.


Drilling Engineers, Drilling Supervisors, Trainee Directional Drillers, and service company personnel with basic drilling engineering skills.


Course content

•    Reasons for directional wells 
•    Declination And Convergence 
•    UTM & Grid coordinates 
•    Factors Affecting Hole Deviation Including Formation And Drillstring Factors.
•    Bottomhole assemblies. Placement of stabilisers. 
•    Survey Reference Points 
•    Calculations And Wellpath Plotting 
•    Surveying Tools And Accuracy 
•    Types Of Directional Wells: types 1,2 and three and calculations. 
•    Kick Off Points, Build Up And Drop Off Rates 
•    MWD And LWD 
•    Drillstring design 
•    Directional Drilling Techniques: Wellpath Design Calculations, Course Corrections, Tools 
•    Designing horizontal wells: kick off points, tangent and landing sections 
•    Long-, Medium-, & Short-Radius Wells; Extended Reach Wells, S-Bend Wells. Multi lateral designs. Joints integrity. 
•    Complete Well Planning Exercises 
•    Cluster Wells 
•    Collision Analysis 
•    Survey Errors, Quantification Of Error Sources 
•    Ellipsoid Descriptive Equations 
•    Spider plots & travelling cylinder 
•    Drillstring Design: Drill Pipe Selection, Drill Collar Selection 
•    Buoyancy Factor Method: Procedure For Selecting Drillcollars 
•    Heavy-Walled Drillpipe (HWDP), Stabilisers, Drilling Jars, Shock Subs 
•    Drillstring Design Criteria, Dogleg Severity Analysis

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