Gas riser apparatus and method
US5326137A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 1993 |
| Grant date | Jul 5, 1994 |
| Priority date | — |
| Expiry date | Mar 23, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4994
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An improved gas riser comprises a pipe nipple, casing, adaptor sleeve, tube, and stiffener. The adaptor sleeve features an internal stop which accurately positions an end of the plastic tube before the tube is plastically deformed into grooves in an internal surface of the adaptor sleeve. Each of the first and second ends of the adaptor sleeve can be manufactured in different diameters to fit pipe nipples and casings that are required by different code regulations. The method of assembling the gas riser comprises inserting a first end of the adaptor sleeve into a second end of a pipe nipple, inserting a second end of the adaptor sleeve into a first end of the casing, welding the second end of the pipe nipple and the first end of the casing to the adaptor sleeve, inserting a stiffener into a tube end, inserting the tube end into the adaptor sleeve, pulling a mandrel through the assembly which plastically deforms the stiffener and forms a seal by urging the tube into grooves on an interior surface of the adaptor sleeve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.