Technical Considerations in the Certification of Drilling Units for Worldwide Service

Abstract

Abstract Technical considerations in the certification of Drilling Units for World Wide Service. The design of the latest generation of offshore drilling units for operation world-wide has presented the greatest challenge to the offshore industry since drilling operations first moved offshore over thirty years ago. None have been more challenged than the electrical and instrumentation engineers tasked with the design of the power and control systems that enable these units to maintain station and conduct drilling operations under adverse environmental condition. An integral part of their job is to arrange the system and select components in conformance with the requirements of the flag state, various coastal states, certifying authorities and classification societies. Such regulations vary not only in scope but also in the manner in which identical concerns are addressed. Designing for compliance with all the pertinent requirements presents a complex task for the engineer. This paper will outline the major requirements pertinent to electrical and electronic systems of the regulations and rules of IMO, the United States, Canada, United Kingdom, Norway and one major classification society, highlight the major differences in their scope and approach and outline suggestions on how simultaneous compliance can be achieved. The authors will draw on ABS’ experience in the classification and certification of several drilling units recently completed or presently under construction.