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US 10,166,715 B2Granted
Method and device for applying protective sheeting of polymer material to a pipeline
AssigneeSaipem S.P.A.
InventorMomtchil Kaltchev
Life of this patent
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Abstract
A method of applying protective sheeting of polymer material to a pipeline extending along a longitudinal axis and having a cutback bounded at opposite axial ends by two end portions of respective protective coatings of polymer material, the method including directly heating the free faces of the end portions; extruding and simultaneously winding about the pipeline a protective sheeting wide enough to cover the cutback and the end portions; and compressing the protective sheeting against the pipeline, the end portions included.
Claims7
A pipeline protective sheeting application device comprising:
- a carriage rotatable about a pipeline extending along a longitudinal axis and including a cutback bounded at opposite axial ends by two end portions of respective protective coatings of a polymer material;
- an extrusion die mounted on the carriage, wherein in use, the extrusion die simultaneously winds about the pipeline and extrudes a protective sheeting of polymer material wide enough to cover the cutback and the end portions;
- a heat treating unit mounted on the carriage and including at least two heaters, wherein the at least two heaters are located between the extrusion die and the pipeline, and in use, said heat treating unit directs and confines heat onto the end portions to directly heat free faces of the end portions;
- and
- a roller configured to compress the protective sheeting against the pipeline including the end portions.
2 more elements
Dependencies are inferred from the claim text.