There are two main motives which prompt an Operator to consider diverless technology for installing and maintaining subsea production systems – namely, physical and economic. This paper traces the history of subsea production in the Australasian region, and evaluates worldwide progress in remote intervention by reference to several landmark projects. Present trends indicate a growing preference towards diverless intervention, especially where this is favoured by local physical and economic factors such as those in the Australasian province. A comparison of typical life cycle costs for manned and unmanned intervention systems illustrates the long term potential benefits of remote technology for this area.

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