.~ Means other than tool structure to induce fluent flow
DEFINITION
Classification: 175/324
(under subclass 320) Apparatus including structure other than the structure of the tool which is specifically adapted to cause the circulation of flowable material (e.g., cuttings or drilling fluid) within the tool shaft or borehole.
(1) Note. Since most boring tools normally include or are inherently adapted to cause a degree of impelling or conveying, tool structure is excluded as subject matter for this subclass and is classified in the appropriate tool subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
100, for means to induce fluent flow comprising discharge passages for motive fluid of a below ground fluid operated motor directed toward the bore entrance.
102, for a below ground pump for the removal of cuttings combined with a below ground tool drive motor.
213, for a flushing fluid handling system in which a pump inlet communicates with the bore bottom. 217, for an above ground means for handling drilling fluid or cuttings including a pump which may be positioned below ground.
323, and the search there noted for a helix or helically arranged structure on a tool shaft for inducing fluid flow.
SEE OR SEARCH CLASS
166, Wells,
62, 68 and 105+ for an eduction pump or plunger in a well.
417, Pumps, appropriate subclasses for pumps of general utility.
418, Rotary Expansible Chamber Devices, appropriate subclasses for rotary expansible chamber devices, per se.
