Delft University of Technology
Faculty Mechanical, Maritime and Materials Engineering Transport Technology
J.J. Hanff Operational and Design Aspects in Mudline Suspension Systems
Masters thesis, Report 89.3.OS.2651, Transport Engineering and Logistics / Offshore Engineering.
Mudline suspension systems are used when drilling offshore exploratory or production wells from a jack-up drilling rig. The main function of such systems is to suspend the casing string weight at the seabottom (mudline) and provide a means for mechanical disconnection, to allow relocation of the rig, once the well has been drilled.
By subsequent re-establishment of the connection with the mudline wellhead, production is allowed, either by means of a tieback to a surface platform, or through a subsea completion.
A brief review of the various available systems is provided in this report, and the key problem areas and operational aspects which are experienced when using mudline suspension equipment are identified.
Further attention is paid to the operator's requirements and the boundary conditions are established.
Finally, new conceptual designs for several selected features, including mudline/surface wellhead interaction, suspension technique and hanger lockdown, are discussed and evaluated.
Reports on Transport Engineering and Logistics (in Dutch)
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