Abstract: The present invention pertains to the technical field of subsea equipment technologies dedicated to the inspection of pipes and risers and describes, according to preferred embodiments of the invention, an inspection tool and a system comprising a compliant feature of passive adaptation for inspection of the annular region of flexible pipes. The inspection tool comprises a mechanical structure with a chamber and a two-way sealing assembly comprising an inner seal and an outer seal that create a tight connection for carrying out inspection operations. Further, a system for the inspection comprising at least the inspection tool, an anchoring mechanism, an approximation mechanism and an ROV is described.

Abstract: The present invention discloses a pig with improvement in the suspension and centralization system, allowing it to behave properly in any diameter within a design range. The seals in the shape of petals and overlapping discs, responsible for the pressure differential that causes displacement of the pig inside the pipe, were designed to close gradually when necessary, until reaching the minimum internal diameter of the pipe. In this configuration, the face of the seals normally generates a lot of friction with the inner wall of the pipe, making it difficult to move. Metal wafers (11) were developed and applied to the seals to reduce friction. A coupling element (4) was also developed to interconnect the different modules of the pig allowing wide movement of the pig inside the pipe, facilitating its passage by sharp curves and inside the equipment. The pig has petal and disk type seals, mechanical centralization and cleaning module (5) and interconnecting tubes (4).

Abstract: This invention offers a method to install a wear-resistant polymeric sleeve in a pipe bend stiffener with a metal inner wall, including the following steps: calculate thickness of the internal wall of the stiffener that can removed; remove the thickness of at least a portion of the calculated inner wall; and apply a polymeric material sleeve in the inner wall of the stiffener, where the polymeric material sleeve has the thickness of the inner wall removed.