US PATENT SUBCLASS 175 / 4.51
.~ With position orienting or indicating


Current as of: June, 1999
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175 /   HD   BORING OR PENETRATING THE EARTH

2  DF  BORING WITH EXPLOSION IN INACCESSIBLE HOLE {12}
4.51.~ With position orienting or indicating


DEFINITION

Classification: 175/4.51

(under subclass 2) Subject matter directed to (1) means to position or aim an explosive charge or projectile relative to a predetermined point or direction in the hole, (2) means to enable an operator at the surface to determine where something (e.g., the explosive charge or projectile) is located in the hole or (3) means to place an indicator (e.g., reference bullet) in the formation or hole wall.

(1) Note. A means which merely centralizes the device in the hole or holds the device against an undetermined point at the side of the hole, or is merely described as engaging the hole bottom is not included as a positioning or aiming means under this definition and is classified on other features.

SEE OR SEARCH THIS CLASS, SUBCLASS:

4.5, for subject matter directed to orienting means for directing successive projectiles or charges along the same path.

SEE OR SEARCH CLASS

166, Wells

255.1+, for a well process including a step of determining the position of an object in the well.