.~ Producing foam or gas in well by foaming or gas producing material
DEFINITION
Classification: 166/309
(under subclass 244.1) A process comprising introducing a material into the well which by interreaction with fluid already in the well acts as a foaming agent in the well or by its own change of state causes production of gas bubbles or foam.
SEE OR SEARCH THIS CLASS, SUBCLASS:
300, for a process involving a chemical interreaction of a plurality of introduced materials which may produce gas or foam.
311, for a process of unloading a well by introduction of gas into the well, which gas may cause generation of a foam or entrained gas bubbles without use of a foaming agent.
SEE OR SEARCH CLASS
516, Colloid Systems and Wetting Agents; Subcombinations Thereof; Processes of Making, Stabilizing, Breaking, or Inhibiting,
10+, for foam colloid systems or agents for such systems or making or stabilizing such systems or agents, when generically claimed or when there is no hierarchically superior provision in the USPC for the specifically claimed art.
