US PATENT SUBCLASS 175 / 73
MEANS TRAVELING WITH TOOL TO CONSTRAIN TOOL TO BORE ALONG CURVED PATH

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

73MEANS TRAVELING WITH TOOL TO CONSTRAIN TOOL TO BORE ALONG CURVED PATH {3}
74  DF  .~> Sectional guide or shaft having means to lock sections in angular relation while boring
75  DF  .~> Normally curved guide or shaft
76  DF  .~> Axially spaced opposed bore wall engaging guides

DEFINITION

Classification: 175/73

(under the class definition) Apparatus comprising means carried by or movable with a tool while drilling to cause the tool to drill a bore or segment of a bore having a nonlinear axis.

(1) Note. Tools which are asymmetrical in shape or which have a means biasing them laterally of a bore and which would enlarge the bore in a lateral direction if rotated are not included even though they are disclosed as bore deflection tools when used as impact devices, see this class subclasses 398+ for such devices.

SEE OR SEARCH THIS CLASS, SUBCLASS:

61, for processes of drilling curved or redirected bores.

231, for means movable relative to tool below ground to control eccentric fluid emission.

325.1+, and the search there noted for bore wall engaging guide means. 398+, for nonsymmetrical bits which may be disclosed as bore deflecting tools (See (1) Note above).