Method of sealing and protecting a plastic lined pipe joint
US4507842A · kind A · utility
Inventor
Key dates
| Filing date | Aug 19, 1983 |
| Grant date | Apr 2, 1985 |
| Priority date | — |
| Expiry date | Aug 19, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49895
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for sealing and protecting a plastic lined pipe joint from corrosive fluid passing through the plastic lined pipe involving the placing of a plastic collar seal internally within the pipe joint at the time of assembly of the pipe joint. The plastic collar seal involves concentric O-rings at each end that annularly seal off the end of the pipe and pipe collar. An external ridge on the collar seal allows the collar seal to rest on the end of the pipe section during assembly and assists in assembling the joint. Such a collar seal has been found to be particulrly useful in oil and gas well applications for injecting corrosive fluids into the well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.