US PATENT SUBCLASS 175 / 325.1
.~ Shaft carried guide or protector

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

320  DF  WITH TOOL SHAFT DETAIL {4}
325.1.~ Shaft carried guide or protector {3}
325.2  DF  .~.~> Coupled between shaft sections or bit and shaft section {2}
325.5  DF  .~.~> Surrounding existing shaft section {2}
326  DF  .~.~> Engaging means advances in adjacent hole

DEFINITION

Classification: 175/325.1

Shaft carried guide or protector:

(under subclass 320) Apparatus in which a means on the tool shaft directs, positions, or shields a drillstring or a portion thereof.

SEE OR SEARCH THIS CLASS, SUBCLASS:

73+, for bore wall engaging guides which act to constrain the tool to bore along a curved path.

97+, for a below ground tool drive motor in which the motor support is provided with means for engaging the bore wall.

323, for a tool shaft having helical impeller or conveyor structure engaging the bore wall.

399, for nonsymmetrical bits provided with bore wall engaging guide means.

408, for bits having means on the bit to centralize of stabilize the bit. SEE OR SEARCH CLASS

166, Wells,

117.5+, for means guiding an insertable element laterally of bore axis and subclasses 241.1+ for means positioning a well device within a well.