Piggable multichamber fluid swivel
US4441522A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 7, 1980 |
| Grant date | Apr 10, 1984 |
| Priority date | — |
| Expiry date | Nov 7, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8807
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fluid swivel is described, of the type which includes an annular chamber formed at the interface between the stationary and rotatable parts of the swivel, which facilitates the passage of a pig through the chamber. A pig diverter device lies beside the outlet formed in one of the parts through which fluid normally exits the chamber, to divert a pig moving through the chamber into the outlet. The diverter device can include a projection lying on the downstream side of the outlet. The projection can extend radially only up to the interface between the two swivel parts, to facilitate disassembly of the swivel. The diverter device can also include a valving mechanism that can shut off fluid flow immediately downstream of the outlet, to direct the fluid stream and pig into the outlet, and the upstream end of the outlet can extend tangent to the chamber to facilitate pig entry therein. The interface between the stationary and rotatable parts of the swivel can lie off of the center of the annular chamber, while the chamber still has a largely circular cross section to facilitate movement of the pig.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.