Thermoplastic composite pipe with multilayer intermediate lamina

Abstract

The invention relates to a thermoplastic composite pipe with a multilayer intermediate lamina. The invention further relates to a method for manufacturing the thermoplastic composite pipe and use of the thermoplastic composite pipe. Composite formation between identical polymers in the critical process step achieves better quality of adhesion. The pipe thus produced is especially suitable for offshore applications in oil or gas production.

Description

technical field [0001] The present invention provides a flexible, fiber-reinforced composite pipe, which includes an inner liner (Innenliner, hereinafter also referred to as "liner"), one or more tape layers and a And the single-layer or multi-layer intermediate layer which joins them, and their manufacturing method. The material of the inner liner, the matrix of the tape layer and the polymer of the intermediate layer are thermoplastic. The composite pipe according to the invention is used for oil and gas extraction, especially for offshore oil or gas extraction, as a riser, as an umbilical, for extracting oil or gas from the seabed Natural gas is transported from wells to risers or for delivery on land. Background technique [0002] In the prior art, so-called unjoined flexible pipes are frequently used in this field of application. Such pipes comprise an inner lining, usually in the form of a plastic pipe, which serves to prevent the conveying fluid from escaping, and ...

AI Technical Summary

Problems solved by technology

However, good adhesion of the same material combination is more difficult to achieve when the solidified surface first has to be melted by the hot melt to start and there is little time available for the chemical reaction

Even in the case of polymers of the same kind, the joint thus established may have insufficient strength