Low friction and high wear resistant sucker rod string
US11352838B2 · kind B2 · utility
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32References
20Claims
0Family size
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Key dates
| Filing date | Oct 7, 2020 |
| Grant date | Jun 7, 2022 |
| Priority date | — |
| Expiry date | Oct 7, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/127
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A sucker rod string is formed from sucker rods and sucker rod couplings. The sucker rod couplings are formed from a 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 sliding coefficient of friction of 0.4 or less when measured against carbon steel. The sucker rod string has low friction and improved pumping stroke, enhanced pumping capacity, and less load in the overall system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.