Mooring, Risers and Drilling Systems

At the end of this course, the students should be able to: 1. identify and analyse mooring systems, the different configurations and components; 2. evaluate mooring design criteria, constraints, equations and failure modes; 3. describe the different types of risers, their applications, design criteria and failures; 4. analyse soil interaction with risers and mooring systems; and 5. discuss the different mooring systems and their comparative advantages.

Mooring configurations: single-leg mooring, spread mooring, turret mooring; mooring components: wire ropes, synthetic fibre ropes, chains, clump weights, drag and suction anchors, piles; winches and windlass; single component and multi-component catenary equations; soil-mooring interaction; mooring failure modes; static, quasi-static, and dynamic mooring analyses; mooring design criteria and considerations. Drilling risers, production risers: flexible, steel catenary; flexible riser configurations: steep/lazy S and wave, free hanging; flexible riser components: bend stiffeners/ bell-mouths, unbonded/bonded flexible risers, bend restrictors; rigid riser components: tieback connectors, stress joints, riser joints and connectors, buoyancy modules, tensioners; riser casing; soil-riser interaction; riser failure modes; structural riser analysis; static and dynamic riser analyses; interference analysis; riser design criteria and considerations. Minimum Academic Standards Equipment Minimum Standards for Laboratories/ Workshops Although other laboratories and workshops not listed here will be shared with many other departments in the faculty and University in general, the laboratories and facilities listed in the table below should be provided and equipped specifically for every Marine Engineering degree programme. Each laboratory or workshop should have sufficient working spaces with safety equipment and relevant manuals. Marine Engineering Workshop Equipment Metalworks and Fabrication Section 1. Work benches with vices for metal work 2. Tool boxes containing hand tools such as screw drivers, wrenches, hammers, hacksaws, files, centre punch, chisel, scrapers, etc. 3. Lathe machines 4. CNC lathe machine 5. Milling machines 6. CNC milling machine 7. Drilling machines 8. Grinding machines 9. Folding machines 10. Power hacksaw 11. Shaping machines 12. Tennoning machine 13. Vertical mortising machine 14. Dovetailing machine 15. Vernier Callipers and Micrometer Screw Gauges 16. Sheet metal folding machine 17. Furnaces (heat treatment facility) 18. Casting facilities 19. Arc welding machines and accessories 20. Gas welding facilities 21. Safety gadgets and first-aid equipment (for fire, electric shocks, impact, etc.) 22. Personal protective equipment (for eye, skin, ear, etc.) 23. Pop riveting machine 24. Guillotine cutting Machine 25. Rolling machine, etc. Carpentry & Woodwork Section 1. Band saw, radial arm saw and circular saw 2. Surfacing machine 3. Mortise machine 4. Thicknessing/Planing machine 5. Wood Lathe machine 6. Portable sander machine 7. Jig saw, rip saw, cross-cut saw, panel saw, tenon saw, compass saw 8. Drilling machine 9. Chest drill 10. Spraying machine 11. Oil stone 12. Wood workbenches with vices 13. G clamp, F clamp, Sash clamp 14. Jack planes, smooth planes 15. Other hand tools such as tri square, claw hammer, pincer, marking gauge, mortise gauge, spirit level, flat chisel, wood rasp, round chisel, wood mallet, spoke shave, screw drivers, tape rule, scraper, etc. Marine Electrical Section 1. Water distillers 2. Hydrometers 3. Multi-meters, voltmeters, ammeters and clamp meters 4. Soldering irons 5. Battery chargers 6. Standard tool boxes for electrical and electronics works 7. Electrical/electronics data books 8. Oscilloscopes 9. Tachometers and phase sequence meters 10. Logic probes 11. Etching machines complete with accessories 12. Coil winding machine, etc. Drafting and Design Studio 1. Drawing tables and chairs 2. Drawing boards, T-squares and instruments 3. Automatic drafting machine 4. Drafting gadgets, stencils, etc 5. Automatic stencil cutter 6. Computer studio or workstation with at least 50 computers 7. Computer graphics and design hall with necessary design software (e.g. AutoCAD, Maxsurf, SACS, Orcaflex, Flexcom, SolidWorks, Inventor, etc.) 8. 3-D printer List of Marine Laboratories S/NO LABORATORY/FACILITY EQUIPMENT/MACHINERY Engine test bed (4- or 6-cylinder turbocharged diesel engine on an engine test bed with Marine Engines and dynamometer and computer interface). 1 Auxiliary Machinery Steam turbine and boiler model Gas turbine model Internal combustion engine model Two-stage compressor Injector testing machine Ship navigation simulator 2 Simulation Laboratory Dynamic positioning simulator Engine room simulator Wave simulator Rigid-rotor balancing machine Bentley Navada rotor Kit Vibrometer 3 Rotordynamics and Proximeters and displacement sensors Vibration Piezoelectric accelerometers Voltage-regulator inverter Fast-fourier transform (FFT) analyzer + frontend Offshore structure models Ship models Fluid bench 4 Marine Structures/ Wind tunnel Hydrodynamics Offshore basin and/or Towing tank Carriage for model Wave makers Underwater Camera (HD) U-tube oscillating water tunnels Cavitation tunnels. Staffing Academic Staff The NUC guidelines on staff/student ratio of 1:15 for Engineering and Technology departments shall apply. However, there should be a minimum of six full-time equivalents of Staff in the department. There is need to have a reasonable number of Staff with doctoral degrees as well as sufficient industrial experience. With a minimum load of 15 Units per semester for students and a minimum of six full-time equivalent of staff in each programme, staff should have a maximum of 15 contact hours per week for lectures, tutorials, practical’s and supervision of projects. NUC requirement encourages all academic staff to have PhD degrees; hence appointment of academic staff is preferably to the Lecturer cadre. Only in exceptional cases are candidates with great promise appointed to Graduate Assistant and Assistant Lecturer positions for the purpose of being developed to the Lecturer cadre as registered PhD candidates. Academic Support Personnel Teaching Assistant/Demonstrators to help lecturers in the conduct of tutorials, practical’s and field work. This category of personnel is not expected to be regular staff as they are to be paid on the basis of approved hourly rate. Administrative Support Staff The services of the administrative support staff are indispensable in the proper administration of the departments and faculty offices. It is important to recruit very competent senior staff that are computer literate. Technical Support Personnel The services of technical support staff, which are indispensable in the proper running of laboratories and workshop/studios are required. It is important to recruit very competent senior technical staff to maintain teaching and research equipment. They are also to undergo regular training to keep them abreast of developments in equipment operation and maintenance. The minimum of academic staff to technical staff ratio of 5:1 should be maintained. Minimum Number of Staff Subject to the general standards specified by NUC: 1. there should be a minimum of two PhDs and four M.Eng degree holders full-time academic staff to mount the programme; 2. each workshop or laboratory should have an adequate number of staff with the right mix, such that each unit or section in that workshop or laboratory can run efficiently; and 3. there should be an adequate number of administrative staff of the appropriate caliber for the office of the Head of Department to run. Student/Staff Ratio The minimum staff-to-student ratio should be 1:15 from 200 level to 500 level. Library Supplementary to the university and faculty libraries, the programme must have adepartmental library well equipped with specialized books, journals, periodicals and bulletines in both physical collections and E-collections from credible academic and professional sources. A compendium of field and research reports of the programme must also be available in the library for staff, students and researchers. In addition, the library must subscribe to the intellectual property/ repositories of: 1. Renowned academic institutions (national and international); 2. Open access sources and E-learning platforms; and 3. Relevant local and international professional Bodies. The library must also have adequate facilities for: 1. Internet services; 2. Reading and e-learning; and 3. Lending and reservation of specialized materials. Classrooms, laboratories, Workshops, Clinics and Offices The NUC recommends the following physical space requirement: Academic m2 Professor’s Office 18.50 Head of Department’s Office 18.50 Tutorial Teaching Staff Space 13.50 Other Teaching Staff Space 7.00 Technical Staff Space 7.00 Science Staff Research Laboratory 16.50 Engineering Staff Research Laboratory 14.50 Seminar Space per student 1.85 Drawing Office Space (A.O. Board) (Per Student) 4.60 Drawing Office Space (A.I. Board) (Per Student) 3.70 Laboratory Space 7.50 Non-Academic Secretarial Space 7.00 Office Facilities S/No Office No in Facilities Room 1. HOD 1 Table, chairs, A/C, filing cabinet, bookshelves, computer unit, Secretary and facilities. 2. Professor 1 Table, chairs, A/C, filing cabinet, bookshelves, computer unit, Secretary and facilities. 3. Reader 1 Table, chairs, A/C, filing cabinet, bookshelves, computer unit. 4. Senior 1 Table, chairs, A/C, filing cabinet, bookshelves, Lecturer computer unit. 5. Lecturer I 2 Table, chairs, fan, filing cabinet, bookshelves. 6. Lecturer II 3 Table, chairs, fan, filing cabinet, bookshelves B.Eng. Materials and Metallurgical