JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Course Objective

This course covers general introduction to explain the essential features of core

activities, Project Overview, Codes and Standards practice, Installations and Vessels, offshore structures.

Course Outcome

The students would acquire knowledge for designing offshore structures. They shall

also understand, how the physical environment affects such designs and how the structures respond to the environmental actions.

UNIT - I

Overview of offshore structures: Introduction- Deepwater challenges- Functions of offshore structures- Offshore structure configurations- Bottom-Supported fixed structures- Compliant structures- Floating structures- Classification societies and industry standard groups. Novel and small field offshore structures: Introduction- Overview of oil and gas field developments- Technical basis for developing novel offshore structures- Other considerations for developing novel offshore structures- Novel field development systems- Future field development options.

UNIT - II

Ocean environment: Introduction- Ocean water properties- Wave theory- Breaking waves- Internal waves- Sea spectrum- Sea states- Wave-driven current- Loop current- wind and wind spectrum- Offshore environment by location. Loads and responses: Introduction- Gravity loads- Hydrostatic loads- Resistance loads- Current loads on structures- Steady and dynamic wind loads on structures- Wave loads on structures- Applicability of Morison force vs Diffraction force- Steady wave drift force- Slow-Drift wave forces- Varying wind load- Impulse loads- Response of structure- Applicability of response formula.

UNIT - III

Fixed offshore platform design: Field development and concept selection activities- Basic and detailed design of a fixed jacket-Tower-type offshore platform- Special topics. Floating offshore platform design: Introduction- Floating platform types- Design of floaters- Floating production storage and offloading systems.

UNIT - IV

Semi submersibles- Tension leg platforms- Spar design- Hull structure- Construction and installation. Fundamental aspects of the design of FPSO.

UNIT - V

Drilling and production risers: Introduction- Drilling risers- Production risers- Vortex induced vibration of risers- VIV suppression devices- Riser clashing- Fatigue Analysis.

TEXT BOOK:

• 1. Handbook of Offshore Engineering, S. Chakrabarti, Volume 1 & 2, Elsevier, 2005.