| PATENT ASSIGNEE'S COUNTRY | UK |
| UPDATE | 11.00 |
| PATENT ASSIGNEE | This data is not available for free |
| PATENT CLAIMS |
Process for minimizing the number of squeezing & shut-in operations needed to inhibit scale & thereby increase the production rate from an oil well using the precipitation squeeze method, said process comprising injecting into an oil-bearing rock formation matrix a water-miscible formulation comprising (a) Water-miscible surfactant which is a glycol ether in liquid form (b) Soln of water-soluble metal salt comprising multivalent cation & (c) Soln of water-miscible scale-inhibiting compd comprising anionic comp capable of forming scale inhibiting precipitation in situ in the presence of the cations in (b) upon injection into the rock formation matrix, wherein the min. ion concn of scale inhibiting compd (c) is 5,000 ppm based on total a-c being introduced either as a preformed single homogeneous compn., or simultaneously or seq., in either order into the rock formation matrix |
| PATENT PHOTOCOPY | Available on request |
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