Simultaneous analysis simplified for mooring and riser systems
A simplified procedure has been developed for an integrated analysis of both monitoring and maring riser design for floating drilling operations. Although the design of mooring and riser systems is an integral part of the design spiral of a drilling rig, there is no direct link between API RP 2Q and API RP 2P. Consequently, marine riser analysis and vessel mooring analysis are often performed separately by engineers in the offshore industry. As a result, the mooring analysis is often based upon an assumed line pretension, and riser analysis is performed by using assumed vessel offsets. Such assumptions can lead to erroneous or even meaningless results. An integrated analysis of both mooring and riser systems requires a simultaneous analysis of both systems which satisfies API RP 2Q and API RP 2P requirements. Furthermore, this design approach will also generate an optimum design which would better utilize the capacities of the mooring and riser equipment. The design procedure presented here is best explained by an example problem. Assume a drilling company intends to determine the operating limits of a drilling rig at various water depths (300-1,050 ft) for a given geographic area. The mooring and riser equipment has been specified, and the weather data for that geographic location is also known.
- Research Organization:
- Stress Engineering Services Inc., Houston, TX
- OSTI ID:
- 5784201
- Journal Information:
- Oil Gas J.; (United States), Journal Name: Oil Gas J.; (United States) Vol. 84:18; ISSN OIGJA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
42 ENGINEERING
420206 -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
423000 -- Engineering-- Marine Engineering-- (1980-)
DESIGN
DRILLING RIGS
GRAPHS
MARINE RISERS
MOORINGS
NATURAL GAS WELLS
OFFSHORE PLATFORMS
OIL WELLS
OPTIMIZATION
PIPES
WELLS