Internal drilling riser centralizer
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United States of America Patent
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N/A
Issued Date -
Nov 8, 2012
app pub date -
May 3, 2011
filing date -
May 3, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The method of centralizing a rotating string within the bore of a subsea blowout preventer stack and a drilling riser comprising providing a multiplicity of rollers having a first position and a second position, when the rollers are in the first position the rollers defining a first circle which is proximately the size of the bore of the drilling riser, when the rollers are in the second position the rollers defining a second circle which is smaller than the first circle, and when the rollers are in the second position the rollers prevent the rotating string from contacting the bore of the subsea blowout preventer stack or the drilling riser proximate the rollers.
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