Method and apparatus for detecting the presence of hydrocarbons and other substance that fluoresces or absorbs light within a body of water which utilizes a controlled submersible vehicle scanning at or near the water bottom. The method utilizes a selected frequency light source as carried by the submersible to scan the water bottom, and the returned light energy, either at the wavelength of oil fluorescing in water or the source frequency backscatter, is detected and processed for the water bottom as well as a water region that is a selected distance above the water floor. Alternative forms of apparatus are disclosed for carrying out the functions o f both oil fluorescence detection, and for obtaining differential absorption readings as to light source backscatter energy that is created by the ambient water and other factors in the water environment such as marine life, turbidity, etc.
iii
column section which includes at least one buoyancy chamber, and a lower, relatively slender column section. The riser includes, or is adapted to support, at least one conduit for the conveyance of a fluid (e.g. oil or gas) or a control line. The buoyancy provided by the upper section of the riser column is preferably variable, and this facilitates the connection and use of the riser. The riser may be used for drilling operations or for production operations. By employing a riser in accordance with the invention, it is not necessary to use large riser tensions in order to maintain the position and structural integrity of the riser in deep water and rough weather.
4437630 SPRAY BOOM APPARATUS APPLYING CHEMICAL DISPERSANTS TO OCEAN SPILLS
FOR OIL
James C Jefferies assigned to Biegert Aviation Inc
4436451 SELF-STANDING
MARINE
RISER
Harold E Anderson, London, United Kingdom A self-contained spraying boom apparatus for in-flight adaptation of the aircraft for aerial swath spraying.
4437786 ARTIFICIAL I -~
SEAWEED
4/1
John Morrisroe
A self standing marine riser is provided which comprises a base, a riser column, a flexible joint between the base and the riser column, and means for providing a loose coupling between the top of the riser column and a vessel, rig or platform on the surface above the location of the riser. The riser column comprises an upper
Artificial seaweed or reefs for installation on the bottoms of lakes or the like to build up sandbars