Method for scale and corrosion inhibition in a well penetrating a subterranean formation
US4787455A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1987 |
| Grant date | Nov 29, 1988 |
| Priority date | — |
| Expiry date | Nov 18, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/927
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method for inhibiting the formation of scale and corrosion in a well penetrating a subterranean formation for the production of fluids from the formation comprising injecting a predetermined amount of microparticles of a basic anion exchange resin providing a source of polycations into the formation about the well and that are trapped and retained by the interstices of the formation without rendering the interstices or the formation impermeable to the flow of fluids. Thereafter a predetermined amount of an aqueous solution of scale and corrosion inhibitor is injected into the formation about the well that contacts the basic anion exchange resin and becomes fixed in a slightly soluble state either by complexation with the polycations or is precipitated by the polycations in the exchange resin. The scale and corrosion inhibitor is released slowly at effective concentration into fluids produced by the well to inhibit scale formation and corrosion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.