| PATENT ASSIGNEE'S COUNTRY | USA |
| UPDATE | 06.99 |
| PATENT ASSIGNEE | This data is not available for free |
| PATENT CLAIMS |
Method of sealing a subterranean zone penetrated by w well bore contg a string of drill pipe to prevent the uncontrolled flow of fluids into & out of the zone by way of permeable portions thereof comprising - Prepg pumpable sealing compn which rapidly converts into a high viscosity sealing mass upon mixing & reacting with well bore fluids comprising water contained in said well bore said sealing compn comprised of oil, hydratable polymer, organophilic clay & water swellable clay & - Pumping said compn through one or more openings at the end of said string of drill pipe into said zone at low flow rate rel. to said well bore fluids therein whereby said sealing compn flows through said well bore fluids with a minimum of mixing therewith & whereby portions of sealing compn are converted to sealing masses as said sealing compn flows through said zone, said sealing masses being successively diverted into & sealing said permeable portions of said zo ne through which fluids are flowing out of zone thereby allo wing the hydrostatic pressure exerted in zone to increase until all of said permeable portions in zone are sealed |
| PATENT PHOTOCOPY | Available on request |
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