Course content

Deviation drilling, history and background. Actually, viewpoints on benefits and problems, methodology for assessment of feasibility of different alternatives of well types. Presentation and analysis of equipment and methodology for deviation, high deviation and horizontal boreholes, axial movements, rotation and pumping, also borehole pressure control equipment and methodology. Analysis on methodology of borehole steering, directional changes and control, design and implementation of complex borehole trajectories, presentation of related equipment and components. Borehole trajectory calculations, accuracies. Forcebalances in the borehole, analysis; tension, compression, buckling criteria, fatigue. Application of borehole tractors, concepts and consequences. Drilling of slimhole; use of coiled tubing: Benefits, problems, changes in force- and power application analysis. Discussions.

Learning outcome

The topic gives an introduction to the methods used for high deviation and horizontal drilling, identifies conditions which are of significant importance and gives an insight into calculations which are necessary for planning and accomplishment of such boreholes.

Learning methods and activities

Lectures and exercises. The course is held in English if international masterstudents attend. The exam can be changed from written to oral at the postponed exams (continuation exam).

Compulsory assignments

• Exercises

Recommended previous knowledge

Basics in drilling engineering.

Course materials

Compendium. Relevant textbooks will be announced at semester start.

Credit reductions