477 



Figure 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 Services, Ltd., British 

 Columbia, 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 



