Riser braking clamp apparatus
US4616707A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 8, 1985 |
| Grant date | Oct 14, 1986 |
| Priority date | — |
| Expiry date | Apr 8, 2005 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/006
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Apparatus for use in drilling a well from a floating vessel by means of a riser which connects the vessel's drilling equipment to a wellhead assembly adjacent the ocean floor. The riser is capable of being disconnected from the wellhead assembly and having the motion of its upper end arrested and subsequently secured to the vessel. The present riser braking clamp apparatus comprises braking elements integrally carried by the telescoping joint located at the upper end of the riser. Actuation of these braking elements prevents further telescopic movement of the telescopic joint, thereby preventing movement of the riser upper elements relative to the vessel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.