California Soon to Have Platform in 850 Ft of Water

Serial Information: Civil Engineering—ASCE, 1976, Vol. 46, Issue 4, Pg. 49-50

Document Type: Feature article


Exxon's oil drilling and production platform, to be placed off Santa Barbara, Calif. next July, will stand in water twice as deep�� 850 ft versus about 420 ft�� as any other such platform. The jacket, standing about 900-ft high, has piles driven through its eight legs that are about 1,250-ft high, surely a record; but the portion of the pile above seabed acts not as pile but as leg. The jacket is being fabricated in two pieces, top and bottom, which will be joined near the site. Hydraulic connectors, each consisting of hydraulic cylinders arrayed radially around each leg, lock the two halves together until they are welded. For upending and submerging in a controlled manner, the tall legs must be sealed off at intermediate points; unique bridge plugs do this.

Subject Headings: Offshore platforms | Driven piles | Hydraulics | Welded connections | Submerging | Sea floor | Fabrication | California | United States

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