Threaded spacer
US6371224B1 · kind B1 · utility
12Cited by
10References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2000 |
| Grant date | Apr 16, 2002 |
| Priority date | — |
| Expiry date | Mar 9, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49877
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An improved thin walled threaded spacer for use in preventing thread galling in adjacent sections of drill pipe in a drill string is formed by mechanically deforming a strip of copper/beryllium alloy containing 2% beryllium to form a preform having a hollow, truncated conical section and then mechanically deforming the conical section to impart helical grooves therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.