Actuation assembly for riser connection dog
US8316948B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2010 |
| Grant date | Nov 27, 2012 |
| Priority date | — |
| Expiry date | Aug 20, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/085
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A box and pin coupling for a drilling riser having an actuator assembly with an attached dog. The actuator assembly includes an actuation rod having an end affixed to the dog. A portion of the rod is circumscribed by an annular sleeve, where the outer surface of the sleeve is threadingly attached to one of the box or pin. A shoulder is formed on the rod outer circumference between the sleeve and the end of the rod attached to the dog. A retainer cap is provided on the end of the rod opposite where it attaches to the dog. The sleeve abuts the rod on one end, and the retainer cap on the other, so that rotating the sleeve axially moves the actuation rod, that in turn moves the attached dog into or out of engagement with a profile on the other of the box or pin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.