公开(公告)号：US09683411B1

公开(公告)日：2017-06-20

申请号：US15068855

申请日：2016-03-14

Applicant: Chevron U.S.A. Inc.

Inventor： Christopher Allen Kassner ,  Antonio C. F. Critsinelis ,  Helena Miao ,  Keiron Anson

IPC: E21B17/01 ,  F16L1/16 ,  F16L1/028 ,  E21B43/01 ,  E21B19/00

CPC classification number: E21B17/015 ,  B63B35/4413 ,  E21B17/01 ,  E21B17/012 ,  E21B19/004 ,  E21B43/0107

Abstract: Disclosed are riser assemblies for connecting a topside structure and a subsea production facility. The assembly includes an upper riser having an upper end terminating at the topside structure, a flow diverting structure having an upper interface configured to connect to the upper riser and a lower interface configured to connect to at least two lower risers such that the upper riser is in communication with the at least two lower risers. Methods of deployment of the riser assemblies are also disclosed. The method includes connecting an upper riser to the topside structure, and connecting a first lower riser to a lower bore of the flow diverting structure such that the upper riser, the flow diverting structure and the first lower riser are connected, and the upper riser is in fluid communication with the first lower riser. Additional lower risers can be installed at a later time if desired.