US PATENT SUBCLASS 175 / 339
.~.~ With drilling fluid conduit details

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

327  DF  BIT OR BIT ELEMENT {21}
331  DF  .~ Rolling cutter bit or rolling cutter bit element {26}
339.~.~ With drilling fluid conduit details {1}
340  DF  .~.~.~> Fluid conduit lining or element (e.g., slush tube or nozzle)

DEFINITION

Classification: 175/339

(under subclass 331) Apparatus in which the bit is provided

with a particular nozzle, passage or conduit to supply drilling fluid to the cutting edge of the rolling cutter element or to the surface of the formation being disintegrated.

(1) Note. Since nearly all earth boring tools under subclass 331 are provided with some form of drilling fluid supply, a mere nominal recitation of a fluid nozzle or passage has been excluded.

(2) Note. The fluid nozzle, passage or conduit need not define a tubular structure, it may form only a portion of the wall of the fluid conducting means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

227+, for storage and conduit means for a bit lubricant other than the drilling fluid.

332+, for a core forming type roller bit provided with fluid conduit details. 337, for a drilling fluid supply to a roller cutter element bearing.