Pneumatic riser tensioner
US4808035A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 1987 |
| Grant date | Feb 28, 1989 |
| Priority date | — |
| Expiry date | May 13, 2007 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/006
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A system for supporting one end of a riser or other elongate element from a marine structure. In the preferred embodiment, a plurality of gas springs are symmetrically disposed about the upper end of a riser. The axis of compression of each gas spring is parallel to the axis of the riser. One end of each gas spring is secured to the riser and the other end of each gas spring is secured to the marine structure. Relative motion between the riser and marine structure along the riser axis is accommodated by contraction or extension of the gas springs. A gas reservoir can be provided to reduce pressure changes as the gas springs extend and contract. This reduces changes in the loading applied to the riser as the marine structure moves relative to the ocean bottom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.