(under the class definition) Apparatus including means which are provided for bringing a stream of gaseous fluid above atmospheric pressure into intimate contact with a body of drilling liquid which liquid is intended to be introduced or directed into a borehole.
(1) Note. Gaseous fluid at normal atmospheric pressure is not considered as "pressurized", for the purposes of this subclass. However, a statement that a stream consists of compresses gas is sufficient to cause classification herein.
SEE OR SEARCH THIS CLASS, SUBCLASS:
69, and 71, for drilling processes including the use of pressurized gas.
SEE OR SEARCH CLASS
173, Tool Driving or Impacting, 74, and see the search noted therein for plural cleansing fluid sources utilized with a tool driving or impacting means.
261, Gas and Liquid Contact Apparatus, appropriate subclasses for gas and liquid contact apparatus of general utility.
