公开(公告)号：US20240287855A1

公开(公告)日：2024-08-29

申请号：US18569153

申请日：2022-04-07

Applicant: SAIPEM S.P.A.

Inventor： Amedeo MARCOTULLI

IPC: E21B17/01

CPC classification number: E21B17/015

Abstract: An arrangement of an umbilical of data communication lines and/or electrical energy transmission lines is mounted on a lazy wave catenary riser. The umbilical has a first section extending from an upper hang off location of the riser continuously downward to a first installation point at the riser and a second section extending from a second installation point at the riser continuously downward to the sea bed at a riser touch down location. The first installation point is positioned in an installation region of the riser between a lowest sag bend point and a highest hog bend point of the lazy wave catenary riser extension. The first 1 section is tensioned to a flatter catenary shape than a catenary shape of the riser between the upper hang off location and the first installation point, so that a portion of the first section extends detached from the riser.

公开(公告)号：US20240229576A1

公开(公告)日：2024-07-11

申请号：US18560336

申请日：2022-04-07

Applicant: SAIPEM S.P.A.

Inventor： Amedeo MARCOTULLI

IPC: E21B19/00 ,  E21B43/01

CPC classification number: E21B19/004 ,  E21B43/0107

Abstract: A riser termination connecting a steel riser duct to an I-tube or J-tube connecting interface of a floating unit has an upper hang off portion, lower coupling adapter, steel termination conduit having an upper conduit end rigidly connected to the upper hang off portion, and lower conduit end connected to an adjacent conduit section of the riser duct. The termination conduit extends axially slidable through the coupling adapter. A cylindrical bearing seat inside the coupling adapter defines a bearing seat diameter and axis. An annular rounded bearing body has a bearing body diameter and protrudes outward from the termination conduit inside the bearing seat, the bearing body diameter being smaller than the bearing seat diameter to provide a unilateral gap and allow relative axial sliding and rotation. The termination conduit includes a variable cross-section portion having an external diameter and wall thickness tapering from the bearing body.