Thermally insulated bulkhead for in situ oil shale retort

Details Thermally insulated bulkhead for in situ oil shale retort Thermally insulated bulkhead for in situ oil shale retort

1979-04-09

1981-10-13

Corbin, David H.

Hydraulic and earth engineering

Underground passageway, e.g., tunnel

299 2, E21F 1700

Patent

active

042945631

ABSTRACT:
An insulated bulkhead seals an access drift adjacent a hot portion of a fragmented permeable mass of formation particles containing oil shale in an in situ oil shale retort. The bulkhead includes a steel plate for closing the cross-sectional area of the drift. The periphery of the bulkhead is anchored in concrete in a slot cut into the walls, roof and floor of the drift. A first layer of heat insulating material is applied to a face of the bulkhead plate adjacent the hot portion of the fragmented mass for reducing heat transfer to the bulkhead from the fragmented mass. A second layer of heat insulating material covers the walls, roof and floor of the drift adjacent the insulated face of the bulkhead plate to minimize thermal degradation of formation surrounding the periphery of the bulkhead.

REFERENCES:
patent: 2855757 (1958-10-01), Meade
patent: 3302343 (1967-02-01), Bear
patent: 4076312 (1978-02-01), Cha et al.
patent: 4133580 (1979-01-01), French

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