Analyzing the safety of removal sequences for piles of an offshore jacket platform

Abstract

An inevitable consequence of the development of the offshore petroleum industry is the eventual obsolescence of large offshore structures. Proper methods for removal of decommissioned offshore platforms are becoming an important topic that the oil and gas industry must pay increasing attention to. While removing sections from a decommissioned jacket platform, the stability of the remaining parts is critical. The jacket danger indices D _σ and D _s defined in this paper are very useful for analyzing the safety of any procedure planned for disassembling a jacket platform. The safest piles cutting sequence can be determined easily by comparing every column of D _σ and D _s or simply analyzing the figures of every row of D _σ and D _s.

Keywords

jacket platform / removal / safety analysis / stress