Application for spraying liquid chemical onto drill pipe
US4433639A · kind A · utility
Inventor
Key dates
| Filing date | Jun 1, 1982 |
| Grant date | Feb 28, 1984 |
| Priority date | — |
| Expiry date | Jun 1, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S118/18
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The applicator is annular in configuration, having top and bottom walls formed of elastic material. The central openings through these walls are undersized, so that the walls seal around the string of pipe passing through the openings. The applicator is mounted on the string and is free to move laterally with it. Thus there is provided a free-floating, sealed, annular spray chamber mounted on the string and free to move laterally with it. A ring of nozzles is mounted within the chamber for spraying the string. A pump and conduit supply pressurized chemical to the nozzles. A vacuum pump and conduit suck excess chemical from the chamber for recovery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.