Boring or penetrating the earth – With signaling – indicating – testing or measuring – Indicating – testing or measuring a condition of the formation
Patent
1985-08-26
1988-10-11
Lechert, Jr., Stephen J.
Boring or penetrating the earth
With signaling, indicating, testing or measuring
Indicating, testing or measuring a condition of the formation
166285, 166289, 166290, 175 57, 175 75, 252628, 252630, 252633, 405128, 405129, 405266, 405269, 405131, 405263, 405240, 405241, E21B 4700, E21B 47026, E21B 4900, E21B 700
Patent
active
047764090
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION OF THE PRIOR ART
In various industries it has been common practise to discharge aqueous, dry or semi-solid waste chemicals or radioactive materials into ponds, which waste material after a period of time tends to become pasty or solid due to the evaporation of water therefrom. After the waste material has assumed a substantially solid state, dry particles thereof that are exposed to the ambient atmosphere tend to become airborne and are a health hazard. In addition, the toxic material in such an impoundment tends to leach into the soil adjacent thereto as well as contaminate ground water.
In the past, various methods have been proposed to lessen the danger inherant to such hazardous impounded materials, but such methods have not been effective. One such method includes the removable of a portion of the waste material, and erecting a concrete or betonite isolation wall in an attempt to contain the balance of the impounded material.
Also it has been proposed to excavate the impounded material and transport the same to existing or newly built disposal sites that may or may not be sealed with a liner. However, when either of the above identified methods is used, the impounded material is subjected to mechanical action that renders a portion of it airborne with consequent health hazards.
A major object of the present invention is to provide an insitu method of treating impounded toxic and radioactive materials, and an apparatus for carrying out the method that does not have the operational disadvantage of prior art treatment methods, and one that transforms the impounded material into a solid substantially insoluble mass from which toxic materials will not leach out into adjoining land or water table, nor will any substantial surface particles of the mass become airborne even when the mass is subjected to elements of weather.
Another object of the invention is to supply a method of treating hazardous impounded materials in such a manner that the danger of transporting the same over public highways is eliminated.
A further object of the invention is to furnish a method of treating hazardous waste material that is more rapid in carrying out the less dangerous to the personnel involved than prior art methods that attempted to attain the same results.
A further object of the present invention is to treat an impoundment containing radioactive material to minimize the escape of radon gas therefrom and to render radioactive compounds in the impoundment insoluble to the extent that they will not leach out from the treated impoundment.
SUMMARY OF THE INVENTION
The insitu impoundment treating apparatus includes an assembly of adjacently disposed, power driven, rotating cutter-injectors supported on the lower ends of vertically disposed hollow kelly stems or drill pipe that may move up and down. The assembly is supported by a boom or the like that extends outwardly from a power driven vehicle such as a tractor pipelayer crane or the like. The boom supported assembly may be extended out over the impoundment a substantial distance, while the power driven vehicle remains on solid land adjacent the impoundment.
The assembly cutter-injectors are sequentially lowered into adjacent areas or stations of the impoundment while rotating to homogenize the hazardous waste material therein to a desired depth. After the desired depth has been reached, the cutter-injectors are moved upwardly while rotating, and simultaneously treatment chemicals for the hazardous waste material are injected therefrom.
The depth to which the cutter-injectors are moved downwardly and then raised upwardly as above described produce different results. If the cutter-injectors are moved downwardly and then upwardly in only the land beneath the impoundment, an impervious liner to contain the hazardous waste may be formed without removing the hazardous material from the impoundment. By lowering the cutter-injectors to the bottom of the impoundment and then raising them upwardly, the entire contents of the impoundment may be transformed to an iner
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Lechert Jr. Stephen J.
Locker Howard J.
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