Method and apparatus for joining a subsea pipeline to an offshore platform riser
US3967462A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 10, 1975 |
| Grant date | Jul 6, 1976 |
| Priority date | — |
| Expiry date | Mar 10, 1995 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02B2017/0095
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Apparatus includes an offshore platform riser subtended by a joint chamber having port means for receiving a subsea pipeline and access means for a submersible capsule. The riser and chamber are attached to the platform in such manner as to provide for thermal expansion and to permit detachment when an abnormal loading is encountered. Platform winch means attached to cable means passing through the riser and chamber are used to pull an end of the pipeline into the chamber. Personnel utilizing the capsule then enter the chamber for completing the joining of the pipeline and riser. The joining and subsequent inspection operations are conducted at substantially atmospheric conditions in the chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.