Weather-resistant and self-draining thread protector
US4487228A · kind A · utility
26Cited by
11References
12Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Dec 19, 1983 |
| Grant date | Dec 11, 1984 |
| Priority date | — |
| Expiry date | Dec 19, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S411/908
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A self-draining composite plastic and steel thread protector for both the pin and box ends of oil field tubulars. The protector completely seals and prevents pressure differentials across the threads as well as provides openings for draining any moisture that may enter the tubular.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.