End-fitting for flexible pipe
AssigneeCoflexip
InventorsEric Buon, Hugues Berton
Life of this patent
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Abstract
A fixing end-fitting for a flexible tubular pipe, the pipe comprising an inner sealing sheath, a pressure vault comprising a short-pitch helical winding of a metal forming wire, an intermediate sheath and at least a web of tensile long-pitch wound armour wires and an outer sealing sheath. The end-fitting comprises a stepped part capable of sliding into a stepped cylindrical housing of the end-fitting. Two crimping elements sealingly fix the inner sheath and the intermediate sheath. Screws enable the stepped part to be brought closer to and be fixed on the end-fitting. The stepped part and the deformable elements constitute three separate elements, thereby facilitating mounting and providing a better control of tightness.
Claims9
A fixing end fitting for a flexible tubular pipe, wherein the pipe comprises from the inside outward:
- at least an internal sealing sheath, a pressure vault formed by a short-pitch helical winding around the internal sheath, an intermediate sheath, at least one external protective sealing sheath;
- the end-fitting comprising:
- a cylindrical housing with a stepped opening therein;
- the end-fitting including a stepped part that is corresponding to the stepped opening and that is slidable in the correspondingly stepped opening in the housing;
- the fitting having a front and a rear;
- a deformable front crimping element positioned and shaped for fixing and sealing at the front at the internal sheath;
- a deformable rear crimping element positioned and shaped for fixing and sealing at the rear at the intermediate sheath;
- bolts attached for enabling the stepped part to be brought up to the end-fitting and fixed thereto;
- and
- wherein the stepped part, and the front and the rear crimping elements form three separate elements.
Dependencies are inferred from the claim text.