.~ Unsupported abrading particle type (e.g., shot)
DEFINITION
Classification: 175/380
(under subclass 327) Apparatus in which the bit is particularly adapted to receive and restrain unsupported abrasive particles between its outer end and the bore bottom, said particles forming the cutting edge of the bit.
(1) Note. For classification under this definition the abrasive particles must be described as separate elements such as shot or other pellets insertable into the bore. Drilled chip particles which may incidentally function to disintegrate the formation are excluded.
(2) Note. The abrasive particles need not be claimed for classification in this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
54, for shot or pellets which are recirculated by the drilling fluid and act or aid in disintegrating the formation.
