(under subclass 244.1) A process comprising (1) removing undesired deposited material from well apparatus, (2) removing undesired deposited material from an existing bore hole or cavity or surrounding formation or (3) removing undesired liquid standing in the well and impeding the production of the desired fluid from the earth.
SEE OR SEARCH THIS CLASS, SUBCLASS:
301, for a process for removing a stuck object, grappling or fishing in the well.
305+, for a process of placing a fluid into the formation, and see (1) Note in subclass 305 for the distinction between subclasses 305+ and 311+.
309, for a process of unloading a well by producing foam or gas in the well by a foaming or gas producing material.
314, for a process of producing the well which may include moving liquid in the well out of the well.
SEE OR SEARCH CLASS 15, Brushing, Scrubbing, and General Cleaning,
1.7, for submerged cleaners with ambient flow guides, and subclass 246.5 for tank cleaners, and see the search notes thereunder.
102, Ammunition and Explosives,
301+, for apparatus and methods for cleaning a bore by exploding a torpedo.
134, Cleaning and Liquid Contact With Solids,
22.1+, for process of cleaning hollow articles other than wells.
137, Fluid Handling,
15, for processes of cleaning fluid handling means of general utility.
