The use of subsea completions for HPHT fields has been discussed for several years. This paper will address the historical work which was performed at the time before there were immediate field applications, and the current development's status. The paper will then describe the work which has been performed under a study funded by Shell UK Exploration & Production, with requirements derived to meet the needs of a real HPHT field. Under this study, the wellhead, the tubing suspension equipment, the xmas tree equipment and the installation equipment has been critically screened and classified. It was classified broadly as either a straight forward technical extension of existing equipment, equipment requiring design work without immediate qualification testing, or as a technical extension with "art" involved, therefore requiring qualification testing to guarantee a viable solution. An overview of the design goals, the resulting equipment, and the test program involved will be given. Finally, the authors will address the question, "is the technology sufficiently developed for an immediate commitment to a field development or is further work required?"
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