Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Submerging – raising – or manipulating line of pipe or cable...
Patent
1978-02-24
1979-05-22
Shapiro, Jacob
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Submerging, raising, or manipulating line of pipe or cable...
405169, F16L 100
Patent
active
041556690
ABSTRACT:
The invention relates to methods and apparatus for effecting deep water repair of pipelines especially during a pipelaying operation. A damaged portion of the pipeline is located and is prepared for receiving a pipeline plug member by cutting away the damaged portion leaving a prepared pipeline end section. The pipeline plug member is secured in a submersible repair frame which is lowered from a floating vessel into an operational relationship with the prepared pipeline end section. The plug member is aligned with the pipeline end section and is inserted into the end section. Thereafter, the plug member is sealingly secured in the pipeline end section and the repair frame is removed from its operational relationship with the pipeline. The pipeline is dewatered and the end section is then raised onto a floating vessel. The repair frame, in addition to including means for holding and manipulating the plug member, also has a manually operable control panel manipulating means for controlling operations of the repair frame, and a submersible vehicle docking station to position a submersible vehicle in an operative relationship to the control panel manipulating means. The repair frame is preferably lowered to the bottom of the body of water with a pick up line or a pilot line attached to the plug member.
REFERENCES:
patent: 3578233 (1971-05-01), Meister
patent: 4028903 (1977-06-01), Dietrich
patent: 4050955 (1977-09-01), Southgate
Brown & Root, Inc.
Shapiro Jacob
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