US PATENT SUBCLASS 175 / 79
TOOL SHAFT ADVANCED RELATIVE TO GUIDE INSERTABLE IN INACCESSIBLE HOLE TO CHANGE DIRECTION OF ADVANCE

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

79TOOL SHAFT ADVANCED RELATIVE TO GUIDE INSERTABLE IN INACCESSIBLE HOLE TO CHANGE DIRECTION OF ADVANCE {3}
80  DF  .~> Tool telescopes over guide having surface set at angle in hole
81  DF  .~> With anchor for guide engaging hole side wall
82  DF  .~> Guide carried by shaft to operative position {1}

DEFINITION

Classification: 175/79

(under the class definition) Apparatus comprising a tool shaft and a means engageably by the shaft as the shaft is advanced to change the direction of advance of the shaft, said means being insertable in an inaccessible hole.

(1) Note. For the meaning of "inaccessible hole", see the class definition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

4, for processes and devices involving driving a core receiver into the earth formation usually in a lateral direction by a an explosion.

77, for a side wall tool fed laterally without rotation from an inaccessible hole.

78, for means carried by housing insertable in an inaccessible hole to advance side wall tool laterally.

220, and the search there noted for devices with above ground guides for a relatively advancing tool. SEE OR SEARCH CLASS

166, Wells,

55.3, for apparatus for perforating or cutting a slot in a well casing having a cam or wedge actuated cutter, subclass 100 for lateral probes or seals engaging a well wall which have similar structure and subclasses 117.5+ for lateral diverting means (e.g., whipstocks) for tools, per se, which are used in wells or boreholes.