Method for scale and corrosion inhibition in a well penetrating a subterranean formation
US4779679A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1987 |
| Grant date | Oct 25, 1988 |
| Priority date | — |
| Expiry date | Nov 18, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/927
- WIPO fieldCivil engineering
- WIPO sectorOther fields
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 cation exchange resin loaded with the desired cations into the formation about the well 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 cation exchange resin and becomes fixed in a slightly soluble state either by complexation with the cations or is precipitated by the cations 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.