Coupling for rods
US11008818B2 · kind B2 · utility
0Cited by
12References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2019 |
| Grant date | May 18, 2021 |
| Priority date | — |
| Expiry date | Sep 24, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C9/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A cold worked and spinodally-hardened copper alloy comprising from about 8 to about 20 wt % nickel, and from about 5 to about 11 wt % tin, the remaining balance being copper, and having a 0.2% offset yield strength of at least 75 ksi, is used to form a sucker rod coupling or subcoupling. Each coupling is formed from a core having two ends, each end having an internal thread. These box ends engage the pin of a sucker rod or other rod. The exterior surface of the core includes grooves running between the two ends.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.