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Title: Deployment, release and recovery of ocean riser pipes

Abstract

An ocean thermal energy conversion facility includes a long pipe assembly which is supported at its upper end by the hull of the floating facility. Cold water flows to the facility from deep in the ocean. The pipe assembly comprises an elongate pipe construction and a weight connected to the lower end of the construction by a line of selected length. A floatation collar is connected to the construction at its upper end to cause the construction to have positive buoyancy and a center of buoyancy closer to the upper end of the construction than its center of mass. The weight renders the entire pipe assembly negatively buoyant. In the event that support of the pipe assembly should be lost, as by release of the assembly from the facility hull in an emergency, the assembly sinks to the ocean floor where it is moored by the weight. The pipe construction floats submerged above the ocean floor in a substantially vertical attitude which facilitates recovery of the assembly.

Inventors:
 [1];  [2];  [3]
  1. (Los Alamitos, CA)
  2. (Westminster, CA)
  3. (Santa Ana, CA)
Issue Date:
OSTI Identifier:
863716
Patent Number(s):
4234269
Application Number:
05/935,672
Assignee:
Global Marine, Inc. (Los Angeles, CA) OSTI
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
deployment; release; recovery; ocean; riser; pipes; thermal; energy; conversion; facility; pipe; assembly; supported; upper; hull; floating; cold; water; flows; deep; comprises; elongate; construction; weight; connected; line; selected; length; floatation; collar; positive; buoyancy; center; closer; mass; renders; entire; negatively; buoyant; event; support; lost; emergency; sinks; floor; moored; floats; submerged; substantially; vertical; attitude; facilitates; substantially vertical; ocean thermal; water flows; pipe assembly; water flow; assembly comprises; cold water; ocean floor; thermal energy; energy conversion; vertical attitude; riser pipe; floating facility; conversion facility; /405/114/

Citation Formats

Person, Abraham, Wetmore, Sherman B., and McNary, James F. Deployment, release and recovery of ocean riser pipes. United States: N. p., 1980. Web.
Person, Abraham, Wetmore, Sherman B., & McNary, James F. Deployment, release and recovery of ocean riser pipes. United States.
Person, Abraham, Wetmore, Sherman B., and McNary, James F. Tue . "Deployment, release and recovery of ocean riser pipes". United States. https://www.osti.gov/servlets/purl/863716.
@article{osti_863716,
title = {Deployment, release and recovery of ocean riser pipes},
author = {Person, Abraham and Wetmore, Sherman B. and McNary, James F.},
abstractNote = {An ocean thermal energy conversion facility includes a long pipe assembly which is supported at its upper end by the hull of the floating facility. Cold water flows to the facility from deep in the ocean. The pipe assembly comprises an elongate pipe construction and a weight connected to the lower end of the construction by a line of selected length. A floatation collar is connected to the construction at its upper end to cause the construction to have positive buoyancy and a center of buoyancy closer to the upper end of the construction than its center of mass. The weight renders the entire pipe assembly negatively buoyant. In the event that support of the pipe assembly should be lost, as by release of the assembly from the facility hull in an emergency, the assembly sinks to the ocean floor where it is moored by the weight. The pipe construction floats submerged above the ocean floor in a substantially vertical attitude which facilitates recovery of the assembly.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {11}
}

Patent:

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