公开(公告)号：US20210301617A1

公开(公告)日：2021-09-30

申请号：US17214238

申请日：2021-03-26

Applicant: CONOCOPHILLIPS COMPANY

Inventor： Eivind Christoffer Eike HALVORSEN ,  Leif Arne KVARME

IPC: E21B33/038 ,  E21B33/06

Abstract: A suspension head (11) is provided for connection between a high pressure riser (8) and a subsea wellhead (9), for use in drilling and completion operations in which a jack-up rig (1) is employed and a blowout preventer (7) is installed on the jack-up rather than on the wellhead. The use of the suspension head (11) offers improved safety and convenience, allowing the riser (8) to be isolated from the wellhead (9) in emergencies or for carrying out certain operations which would otherwise require the installation of a temporary plug.