(under subclass 2) Subject matter directed to means engaging the hole wall or a tubular member in the hole to (1) block fluid flow between the explosive apparatus and the hole wall or member or (2) attach the explosive apparatus to the hole wall or other wall in the hole so as to resist the action of gravity or a lifting force.
(1) Note. The means to block fluid flow or attach the explosive apparatus must be insertable from above ground to coact with the hole wall or a prepositioned tubular member in the hole.
SEE OR SEARCH CLASS
102, Ammunition and Explosives,
319, for a well torpedo with anchoring means or a well wall contacting guide or buffer.
