Keywords: Subsea blowout preventer stack top kill.svg en Schematic illustration of a subsea blowout preventer stack installed on the seabed with kill and choke lines shown connected ready for a top kill operation Legend red represents the blowout preventer stack grey represents the oil flow passage white tubing represents the kill left and choke right lines light brown represents the larger diameter kill and choke line sections dark brown represents the top of the subsea well casing the five grey rectangles within the lower red shape represent ram-type blowout preventers the two grey rectangles within the upper red shape represent annular-type blowout preventers the dark grey line to the left represents a bent riser Own illustration created with approximate reference to the following sources http //www offshore-mag com/index/article-display/323550/articles/offshore/equipment-engineering/us-gulf-of-mexico/cameron-wins-evo-subsea-bop-stack-contract html BP technical briefing linked at http //www offshore-mag com/index/article-display/5210928327/articles/offshore/deepwater-horizon/deepwater-horizon14 html Kent Wells technical update video linked at http //bp concerts com/gom/kentwells_update24052010 htm especially the illustration at time 6 54 BBC diagram at http //news bbc co uk/2/hi/world/us_and_canada/10159626 stm Economist diagram at http //media economist com/images/images-magazine/2010/21/ST/201021STC294 gif Using Inkscape 0 47 2010-05-27 User 84user thumb left stack without top kill mud lines attached validSVG http //validator w3 org/check uri Created with Inkscape Oceanographic diagrams Blowout preventers Subsea oil wells |