Recovery of fluid fuels by in-situ retorting of carbonaceous deposits

Patent · Tue May 08 00:00:00 EDT 1979

OSTI ID:6083549

Kvapil, R; Clews, K M

In-situ retorts of elongated rectangular shape in horizontal cross section are constructed in subsurface carbonaceous deposits in a plurality of parallel rows in each of which the retorts are arranged end-to-end. The rows are separated by unbroken pillars extending upwardly from rock that is not undermined or penetrated by retorts or tunnels. The ceilings of the retorts slope upwardly at an angle of at least 40/sup 0/ with the horizontal to an apex or crown running longitudinally of the retorts to minimize the danger of roof collapse and provide a broadened pillar through which cross drifts opening into the crown of the retort extend for supplying combustion air. The crown of the ceiling is rounded to minimize the concentration of the forces imposed by the overburden.

• Assignee: Golder Associates, Inc.
• Patent Number(s): US 4153300
• OSTI ID: 6083549
• Country of Publication: United States
• Language: English

Related Subjects

04 OIL SHALES AND TAR SANDS
040401* -- Oil Shales & Tar Sands-- In Situ Methods
True & Modified
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CONFIGURATION
ENERGY SOURCES
FOSSIL FUELS
FUELS
IN-SITU PROCESSING
IN-SITU RETORTING
LIQUID FUELS
MINERAL OILS
OIL SHALES
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PROCESSING
RECOVERY
RETORTING
SHALE OIL
SYNTHETIC FUELS
SYNTHETIC PETROLEUM