The RDM-R method utilizes a dual pipe where the return of the circulation fluid is the inner pipe. Reelwell Drilling Method Riserless (RDM- R) is one of such riserless drilling methods. The control bundle serves as a means of communication between the well and the rig. Riserless drilling is an unconventional drilling technique where the marine riser is eliminated and replaced with a different method to take the return and a control bundle.
This drilling method without the marine riser is known as Riserless drilling.
Therefore, a method that can eliminate the marine riser would be one of attractive alternatives to explore oil fields in deep and ultra-deep water economically. Because of the heavier weight larger vessels which are very scares and expensive are required. As we move into deeper water, the marine riser and its content get bigger and heavier. In some past years when exploration was done in relatively shallow waters it was easy to move into a deeper waters by only increasing the size of the drill rig. A marine riser connects the drilling rig to the mudline and helps for material circulation between the well and the topside. One of the challenges of deep water operation is therefore the marine riser. This is as a result of the need to accommodate the much heavier weight of the marine riser and its suspension/tensioning systems, the space needed for handling more and advanced equipment, the space required for the mud facilities especially when high density drilling fluid is required and finally, to meet standards set by regulating organization. Over the years, the equipment and facilities needed for exploration in such environments have become more sophisticated, expensive and the technology has become more challenging. Pages: 91 + enclosure: CD Stavanger, June 14, Date/yearĢ ABSTRACT Due to a decline in proven petroleum reserves through continued production, exploration of oil and gas has moved into more challenging environment and into deep and ultra-deep water.
Open / Restricted access (Writer s signature) Title of thesis: Hydrodynamic Analysis of Drill String in Open Water Credits (ECTS): 30 Key words: Analysis, Hydrodynamics, Drill String, Open Water, Riserless Drilling. Prof Arnfinn External Supervisor: Harald Syse Nergaard Reelwell AS, External Norway. 1 Faculty of Science and Technology MASTER S THESIS Study program/ Specialization: Offshore Technology/ Marine and Subsea Technology Spring semester, Writer: Clement Adewale Obadina Faculty supervisor: Prof.