Method and apparatus for sealing drill casing

Details Method and apparatus for sealing drill casing Method and apparatus for sealing drill casing

1976-11-18

1978-04-11

Leppink, James A.

Wells

Processes

Cementing, plugging or consolidating

166300, 166162, 166177, E21B 3313, E21B 4327

Patent

active

040834069

ABSTRACT:
A method and apparatus is disclosed for permanently sealing the lower end of a drill casing to a liquid impermeable layer such as bedrock to prevent contaminating fluid seepage between the casing and the liquid impermeable layer from strata disposed above the impermeable layer. Selected quantities of aggregate, resin monomer and catalyst are introduced into the lower end of the well casing and are caused to mix and polymerize whereafter the resinous mixture is ejected through one or more openings in the casing wall adjacent the bedrock layer to form a plug seal which is chemically and mechanically secured to the well casing and the bedrock layer.

REFERENCES:
patent: 1801983 (1931-04-01), Saye
patent: 3014530 (1961-12-01), Harvey et al.
patent: 3557562 (1971-01-01), McLaughlin et al.
patent: 3637019 (1972-01-01), Lee
patent: 3726340 (1973-04-01), Frazer
patent: 3901319 (1975-08-01), Staley et al.

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