Method for retarding mineral buildup in downhole pumps
US4990233A · kind A · utility
8Cited by
6References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 14, 1985 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Jun 14, 2005 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B41/02
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for retarding non-corrosive mineral build-up and plugging in check valves utilized with downhole reciprocating rod pumps, comprising ion implanting or ion plating the interior facing metal surfaces of the check valve with a nonferrous metal or metal oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.