39 



FiGXTBE 4. — Service capsule (Top sphere) being lowered to couple with well- 

 head cellar (Bottom sphere) encapsulating production equipment. The service 

 capsule provides transportation from the surface to the ocean floor, and con- 

 tains life support and oilfield equipment. The one-atmosphere, shirt-sleeve en- 

 vironment eliminates the need for highly specialized diving personnel and 

 support facilities. Photo courtesy of Lockheed Petroleum Seri>ices, Ltd., British 

 Colnmlia, Canada. 



separator was successfully emplaced on the sea floor in the Zakum 

 Field near Das Island, under 75 feet of water. 



These are only a few of the many approaches to the development of 

 technology for the recovery of offshore petroleum. To minimize re- 

 liance on divers added emphasis is being given to the design and use 

 of submersibles. Submersibles have been used in underwater oilfield 



