Drill hole plugging method utilizing sodium bentonite nodules

Details Drill hole plugging method utilizing sodium bentonite nodules Drill hole plugging method utilizing sodium bentonite nodules

1997-08-15

1998-09-22

Schoeppel, Roger J.

Wells

Processes

Cementing, plugging or consolidating

166180, 405116, 405263, 405270, E21B 3313

Patent

active

058100857

ABSTRACT:
A method of plugging holes, in particular the plugging of drill holes in the earth. The method utilizes a tubular capsule filled with coarse ground sodium bentonite. The capsule, when inserted into the hole, sinks through any mud or slurry material within the hole to rest at the bottom of the hole. If the hole is filled with overly dense material, a rod may be used to force the capsules to the bottom of the hole. The capsule is constructed of a water soluble material and includes a plurality of slots cut along its exterior wall to facilitate expansion and to allow liquid to easily permeate the container. A plastic cap on its upper end allows rods to be forced thereagainst to push the capsule downward without puncturing the capsule. Alternatively, layers of sand may be interspersed with layers of bentonite nodules.

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