Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Submerging – raising – or manipulating line of pipe or cable...
Patent
1994-10-21
1995-10-17
Ricci, John A.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Submerging, raising, or manipulating line of pipe or cable...
405158, 138107, 138155, 138177, F16L 112
Patent
active
054584418
ABSTRACT:
An improved pipe section is disclosed for installation into a subsea pipeline. A pipe section in accordance with the present invention provides a length of pipe having a pipe wall and at least a first bearing shoulder projecting circumferentially outward from the pipe wall whereby the pipe section may be handled by supporting the pipe section from the first bearing shoulder during installation. The first bearing shoulder also prevents propagation of buckling failure in the subsea pipeline constructed from such pipe sections and the first bearing shoulder remains available for pipeline retrieval operations in the event of localized failure in the subsea pipeline.
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"Deepwater Pipeline Repair Methods" by R. R. Ayers, Introduction and Summary, Shell Development Co., Nov. 10, 1988.
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"Diverless Buckle Recovery System for Shell 12" Bullwinkle Pipeline Installation, F. Kopp, R. K. Jeffries, 8th Intnl Conf. Mar. 1989.
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"Deepwater Pipeline Repair Methods", vol. 1, Shell Development Co. Houston, Tex. Jan., 1990.
"Second Generation Diverless Buckle Recovery Tools for Shell's 12" Bullwinkle Gas Pipeline Installation, Apr. 23-24, API Conf.
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Appendix I, Statement of Work, from Deepwater Pipeline Repair Methods, pp. 5-7, plus "Task List", p. 1.
Ricci John A.
Shell Oil Company
Smith Mark A.
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