Drilling Fluid

Different types of drilling fluid and selection of these; driling fluid rheology, density and filter properties, clay mineralogy and the clay's reaction with water, polymers, oil-based drilling fluid, chemical and mechanical hole stability; laminar and turbulent pressure loss in pipes and annuli; cuttings transport; hydraulic optimization (of flow rate and bit nozzle).

KNOWLEDGE:
- Composition of different drilling fluids.
- The physical properties of mud’s, like density, rheology and filter building.
- Mud additives to adjust physical properties.
- Cleaning of the mud.
- Chemical and mechanical borehole stability.
- Hydraulic friction during circulation.

SKILLS:
- Design of drilling fluids for different purposes.
- How to adjust and optimize drilling fluid properties.
- Design of flow rate and rheology to optimize the mud pumps hydraulic energy.

GENERAL COMPETENCE:
- Design and evaluate a drilling program with respect to drilling fluid and its hydraulics.

Lectures and compulsory exercises. The lectures will be held in English if international master's students attend. If the teaching is given in English, the examination papers will be given in English only. Students are free to choose Norwegian or English for written assessments. If there is a re-sit examination, the form of assessment may be changed from written to oral examination.