Dimpled riser floatation module
OwnerBarry James McMilesinventor
Life of this patent
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Abstract
An improved subsea riser for use in oil and gas drilling applications having a cylindrical floatation member adapted for attachment to a blow out preventer. The member may be configured with a plurality of generally evenly spaced dimples, indentations or protrusions about the circumference of the member to provide more streamlined water flow around the riser reducing turbulence and oscillations of the riser. The dimples, indentations or protrusions may be arranged in several ways including icosahedral, dodecahedral, octahedral and other polyhedral configurations.
Claims15
A riser comprising:
- a generally cylindrical member adapted for attachment to a blow out preventer from the drilling platform or rig to provide a conduit on a oil field installation;
- and
- a plurality of generally evenly spaced dimples about the circumference of said member, wherein said dimples extend along a predetermined longitudinal dimension of said member.
A riser as claimed in claim wherein said dimples are arranged in an icosahedral pattern based on a polyhedral with identical triangular faces.
A riser comprising:
- a generally cylindrical member adapted for attachment to a blow out preventer from the drilling platform or rig to provide a conduit on a oil field installation;
- and a plurality of generally evenly spaced indentations about the circumference of said member, wherein said indentations extend along a predetermined longitudinal dimension of said member.
A riser comprising:
- a generally cylindrical member adapted for attachment to a blow out preventer from the drilling platform or rig to provide a conduit on a oil field installation;
- and
- a plurality of generally evenly spaced protrusions about the circumference of said member, wherein said protrusions extend along a predetermined longitudinal dimension of said member.
Dependencies are inferred from the claim text.