System and method for converting a floating drilling rig to a bottom supported drilling rig
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United States of America Patent
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Issued Date -
Jun 17, 2004
app pub date -
Nov 11, 2003
filing date -
Nov 18, 2002
priority date (Note) -
Abandoned
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Abstract
A floating drilling rig configured for performing drilling operations while floating on a body of water is modified to become a converted vessel configured for performing drilling operations while resting on bottom by attaching a support barge component adapted to add rest-on-bottom functionality. The support barge component has a ballast system that alone or by supplementing the ballast system of the floating drilling vessel enables the floating drilling vessel to be ballasted to rest on bottom. The ballast system of the support barge component is adapted to be opened to the water to fill and drain as the water level raises and lowers, and thereby maintain a constant soil pressure. The support barge component may also have a suction breaker system to break suction formed between the support barge and bottom. If the floating drilling rig component was previously classified for service in a defined body of water, the support barge may enable reclassification of the converted vessel for service outside the defined body of water.
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