Subterranean disposal of wastes

Details Subterranean disposal of wastes Subterranean disposal of wastes

1994-04-28

1996-02-06

Taylor, Dennis L.

Hazardous or toxic waste destruction or containment

Containment

Geologic, marine, or extraterrestrial storage and containment

405128, A62D 300, B09B 300

Patent

active

054897408

ABSTRACT:
Toxic wastes including naturally occurring radioactive materials are disposed of into subterranean earth formation zones which are bounded both above and below by zones which have higher in situ compressive stresses. The materials are prepared in a slurry of finely ground solids and a carrier liquid and are injected into a fracture created in the disposal zone by a process which includes initiating and extending the fracture with a fracturing fluid having a filter cake building solids material entrained therein to build a sealant layer on the fracture faces, The fracture fluid is followed by injection of the waste material which is followed by injection of more fracture fluid and/or a clear liquid such as fresh water or seawater to remove all toxic material from the injection well and the vicinity thereof. The fracture is then allowed to close to confine the waste material therein.

REFERENCES:
patent: 3292693 (1962-06-01), Hill et al.
patent: 5129469 (1992-07-01), Jackson
patent: 5226749 (1993-07-01), Perkins
patent: 5314265 (1994-05-01), Perkins et al.
patent: 5387737 (1995-02-01), Schmidt et al.

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