指是在挪威技術(shù)協(xié)會(huì)中的科學(xué)和研究基金會(huì)。
ABSTRACT
A reliability study of subsea BOPs has been performed. The study is based on information from 83
wells drilled in water depths ranging from 400 meters (1312 feet) to more than 2000 meters (6562 feet)
in the US GoM OCS. These wells have been drilled with 26 different rigs in the years 1997 and 1998.
The main information source from the study has been the daily drilling reports. The collected data have
been fed into a tailor made database system.
Detailed failure statistics for the various BOP systems are presented. Both the downtime aspect and the
safety aspect of the failures have been evaluated. Further, BOP test time consumption has been
investigated. The results from the study have been compared with the results from another deepwater
BOP reliability study carried out for wells drilled in other parts of the world.