Hot stack25 Oct 2024 09:06
"Gary Willmore
CEO at Lonestar Exploration International Inc.
February 13, 2017
Warm stacked rigs are, in theory, supposed to be maintained almost as if they were on contract. All machinery and systems are run regularly and checked, and the rigs have a reduced, but adequate, crew onboard. Assuming warm stacking is executed properly, rigs can be brought back into service relatively quickly. Depending on the type of rig and its location, daily operational costs for warm stacking are usually around one half of what they are when the rig is in operation. (down-size crew, equipment. support and vessels) = less cost.
Cold stacked rigs, on the other hand, are virtually abandoned, and preservation becomes the focus. While daily operational costs for cold stacking are a much smaller fraction of the cost of full operations, extensive preservation programs require a significant up-front investment. If preservation procedures are not sufficiently implemented before a rig is put into cold stacked mode, the lack of preventative maintenance and operation of generators, station keeping systems (for floaters), marine ballast systems, safety systems, and jacking systems (for jackups) creates a major deferred time and cost risk to owners if the rig has to be put in service again. ( look out for PLC issues during restarts/reactivations) ..."
source: LinkedIn