Apparatus for plugging a blast hole in an in situ oil shale reto

Details Apparatus for plugging a blast hole in an in situ oil shale reto Apparatus for plugging a blast hole in an in situ oil shale reto

1982-06-30

1984-08-14

Nelson, Peter A.

Ammunition and explosives

Blasting

Plug

102312, 102313, 102319, 405286, 166285, 166292, F42D 700

Patent

active

044649940

ABSTRACT:
A plugging apparatus is provided to reliably plug a bottomless blast hole in underground oil shale retorts and oil and gas wells. The plugging apparatus has a special electrically powered sequencer which automatically lowers and releases a bag of cementatious slurry, supported by a drainpipe-reinforced concrete disc, from a canister to form a composite blasting plug in the blast hole.

REFERENCES:
patent: 2047774 (1936-07-01), Greene
patent: 2216067 (1940-09-01), Clark
patent: 2672200 (1954-03-01), Patterson
patent: 3208521 (1965-09-01), Holland et al.
patent: 3578083 (1971-05-01), Anderson et al.
patent: 3640585 (1972-02-01), Hamilton et al.
patent: 3724550 (1973-04-01), Lanmon
patent: 3872925 (1975-03-01), Owen et al.
patent: 4165690 (1979-08-01), Abrahams

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