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US 4,844,660 AGranted
Apparatus and method for removing offshore pilings
OwnerLeon D. Ortemondinventor
Life of this patent
Estimating the term…
Abstract
An assembly for severing tubular piling used to support offshore platforms comprising a support or frame secured adjacent the open, upper end of the piling, a cutting string suspended from the support and comprised of a pipe string, a centralizer and an internal pipe cutter and a power swivel to rotate the cutting string to effect internal severing of the piling.
Claims7
An assembly for severing offshore tubular piling comprising:
- a support means for securing to a tubular piling adjacent the upper, open end thereof such that said open end is substantially unobstructed;
- guide means carried by said support means for positioning around said upper end of said piling;
- a pipe string suspended from said support means for extending into said tubular piling;
- a centralizer means secured in said pipe string for positioning in said tubular piling, said centralizer means having a body, said pipe string being rotatable relative to said body of said centralizer means;
- a cutter apparatus secured in said pipe string at the lower end thereof, said cutter apparatus including means for severing said tubular piling in response to rotational movement of said pipe string;
- and
- means to rotate said pipe string.
4 more elements
A method for removing offshore tubular piling comprising:
- attaching a support means to a tubular piling adjacent the top, open end of said tubular piling;
- providing a guide means for positioning around said upper end of said piling;
- suspending a cutting string from said support means and into said tubular piling, said cutting string including a pipe string, a centralizer means secured in said pipe string, said centralizer means having a body, said pipe string being rotatable relative to said body of said centralizer means and a cutter apparatus secured in said pipe string at the lower end thereof, said cutter apparatus including means for internally severing said tubular piling in response to rotational movement of said pipe string;
- positioning said cutting string such that said centralizer and said cutter apparatus are disposed at a desired location in said tubular piling;
- rotating said pipe string to effect internal severing of said tubular piling;
- and
- removing said severed piling.
4 more elements
Dependencies are inferred from the claim text.