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Concrete double-hulled tank ship

a double-hulled, concrete technology, applied in the direction of hulls, armoured hulls, vessel construction, etc., can solve the problems of limited utility of concrete-hulled ships, hull arising from concrete-hulled ships sinking deeper in water than conventional ships, etc., to achieve high strength

Inactive Publication Date: 2007-05-03
CHEVROU USA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010] In addition to the inner and outer hulls of the vessel, internal structural elements, such as bulkheads and frames also may be fabricated of high strength, light weight, reinforced and prestressed concrete.

Problems solved by technology

Two major disadvantages of concrete hulled ships which have limited their utility are the weight and the thickness of the hull when compared to other materials.
The greater weight of the hull arising from a ship fabricated of concrete made each ship sink deeper in the water than conventional ships.
The greater wave making resistance and hull friction resistance resulted in poor fuel efficiency.
No ships having hydrodynamically faired concrete hulls comparable to modern tank ships in size have ever been built.

Method used

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  • Concrete double-hulled tank ship
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Embodiment Construction

[0016] Recent advances in materials and construction methods have made it possible to efficiently construct very large, strong, relatively lightweight, hollow, concrete structures. The present invention is directed to the application of this recent concrete technology in the construction of double-hulled tank vessels, especially double hulled tank ships. Modern methods for concrete fabrication allow a double-hulled concrete tanker to be optimized in order to minimize hull size and weight. Hull resistance is reduced (fuel efficiency is improved), and the tankers can safely navigate with fewer draft, beam and length restrictions.

[0017] The present invention may be more clearly understood by reference to the drawings which illustrate a representative concrete double-hulled tank ship falling within the scope of the invention which is intended as a non-limiting embodiment of the invention. FIGS. 1, 2, and 3 show different views of a 632 foot long double-hulled concrete tank ship of abou...

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PUM

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Abstract

A double-hulled tanker of not less than of not less than about 2,000 metric tons deadweight in size which is suitable for the transportation of liquid hydrocarbons and meeting the requirements for the United States Pollution Act of 1990 and similar international regulations, said tanker comprising an inner hull and an outer hull separated by a void, said inner and outer hulls being constructed of high strength, light weight, reinforced and prestressed concrete.

Description

FIELD OF THE INVENTION [0001] The present invention is directed to the field of double-hulled tank vessels for over-water transport of liquid hydrocarbons, particularly, petroleum and petroleum products. BACKGROUND OF THE INVENTION [0002] Ships having concrete hulls were being built as early as the late nineteenth century, and cargo ships having concrete hulls were built and used during World War I and World War II when steel was in short supply. See for example U.S. Pat. Nos. 1,297,143; 1,313,592; 1,314,069; and 1,377,153. Two major disadvantages of concrete hulled ships which have limited their utility are the weight and the thickness of the hull when compared to other materials. The greater thickness of the hull necessary for a ship fabricated of concrete translates into a larger “footprint” in the water when compared to a conventional steel hulled ship of comparable cargo volume. Consequently, concrete hulled ships in the past have had significantly greater wavemaking resistance...

Claims

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Application Information

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IPC IPC(8): B63B3/10
CPCB63B3/62B63B5/20
Inventor BALCZEWSKI, JOHN THOMAS
Owner CHEVROU USA INC
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