Method for producing normalized grade D sucker rods
US4832757A · kind A · utility
5Cited by
1References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 8, 1987 |
| Grant date | May 23, 1989 |
| Priority date | — |
| Expiry date | Jul 8, 2007 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An article of manufacture is provided in the form of a sucker rod for use in sucker rod pumps. The sucker rod is formed of a medium carbon manganese-molybdenum steel consisting essentially of about 0.25% to 0.45% carbon, about 1.2% to 1.8% manganese, about 0.20% to 0.55% molybdenum, up to about 0.03% niobium, and the balance essentially iron, the sucker rod being in the normalized condition and being characterized by a yield to tensile ratio in excess of about 0.572, a tensile strength of at least about 115 ksi, and by a microstructure consisting essentially of acicular ferrite, fine pearlite and bainite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.