Oil field pig launcher and receiver
US4073303A · kind A · utility
Inventor
Key dates
| Filing date | Sep 28, 1976 |
| Grant date | Feb 14, 1978 |
| Priority date | — |
| Expiry date | Sep 28, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/4891
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pig valve for use with a pigging system of a pipeline has a body insertable into the pipeline and provided with a hollow interior which forms a straight passage through the body. Rotatably disposed surrounding the body is a sleeve having associated therewith an access arrangement for permitting a pig to be transferred between the passage and outside of the passage for launching and receiving the pig. Whether the valve is used as a launcher or receiver depends only on the orientation of the valve relative to the associated pipeline, and on provision of a deflecting grate in the valve employed as a receiver. The sleeve is arranged for rotating about the longitudinal axis of the straight flow passage of the valve body so as not to interfere with fluid flow through the pipeline.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.