52 × fpso   11 × relief   8 × tank
28 × valve   11 × drilling   8 × dehydration
25 × riser   10 × sour   8 × material
17 × pump   10 × corrosion   7 × simulation
16 × compressor   9 × control-valve   7 × methanol
15 × subsea   9 × h2s   7 × tree
12 × flare   9 × offshore   7 × fire
12 × heat-exchanger   8 × control-system   7 × vessel
12 × psv   8 × seal   7 × electrical
12 × pressure   8 × hull   7 × pipeline
...