Patent ID: 6257337
Filing Date: 2001-07-10
Classification: E21B

Abstract:
A band-shaped floatation collar for a marine riser,said band-shaped floatation collar comprising a hollow inflatable fabric body filled with gas,said floatation collar having a longitudinal axis and being formed from a sidewall body having a longitudinally extending slit extending through the sidewall body to enable the floatation collar to be transversely mounted onto the marine riser,wherein said floatation collar has a generally cylindrical inside surface and a generally cylindrical outside surface and the slit leads from the generally cylindrical outside surface to the generally cylindrical inside surfacesaid floatation collar further having an upper end and a lower end and a plurality of straps extending from the lower end for securing the floatation collar to the marine riser,wherein the floatation collar is further defined by a plurality of gas impermeable fabric walls which define a closed chamber.