公开(公告)号：US11339902B2

公开(公告)日：2022-05-24

申请号：US16960614

申请日：2019-01-10

Applicant: NATIONAL OILWELL VARCO DENMARK I/S

Inventor： Jesper Ries ,  Martin Halsteen ,  Lars Rohbock ,  Bo Bøgelund

IPC: F16L17/067 ,  F16L33/01

Abstract: An end-fitting and an unbonded flexible pipe, where the unbonded flexible pipe includes from the inside and out an internal pressure sheath, at least one armor layer and an outer sheath, the end-fitting further includes a sealing element. The sealing element includes a seal casing concentrically arranged around the internal pressure sheath, the seal casing includes a recess in which a first sealing element is concentrically arranged around the internal pressure sheath such that the surface of the first sealing element at least forms a line contact with the internal pressure sheath, and a second sealing element is concentrically arranged around the internal pressure sheath in the recess such that the surface of the second sealing element at least form a line contact with the surface of the seal casing and form a line contact with the surface of the first sealing element.