(under subclass 244.1) A process in which there is a heating, cooling, or insulating step or a heated or cooled material is used.
(1) Note. A mere welding step is not included. See the search notes below.
(2) Note. The cooling effect of gas flowing through a choke is not subject matter for this subclass unless said effect forms a part of the method being claimed. Processes involving wells flowing through chokes may be classified in subclass 314.
(3) Note. In processes for attacking a formation heat may be generated by chemical reaction with the formation. Such a process is not classified as an original under this definition, however, unless the heat effect is specifically recited in a claim. Processes for attacking the formation are classified in subclass 307 and the subclasses there mentioned.
(4) Note. The heating due to the natural heat of a formation is not included.
SEE OR SEARCH THIS CLASS, SUBCLASS:
55, for apparatus for perforating, bending or separating a tubing or casing by an explosively propelled projectile. 57+, for well apparatus with heating or cooling means.
63, for apparatus involving means for causing an explosion or gas generation in a well.
247, for a process involving nuclear energy or radioactivity for heating.
248, for a process in which an electric current is passed through the earth for heating the earth.
256+, for a process involving in situ combustion.
265+, for a process in which the heating or cooling is used to effect separation of fluids from the well.
270, for a process involving input and output wells and chemical reaction of introduced materials in the pores of the earth or a surfactant produced in situ in the pores of the earth.
272.1, for a process involving input and output wells, and a heating step.
286, for a cementing, plugging or consolidating process including an explosion.
288, for a cementing, plugging or consolidating process including heating.
297, for a process for perforating, weakening, bending, or separating tubing or casing involving an explosion or heating means. 299, for a process including an explosion.
300, for a process including an exothermic interreaction of chemicals introduced into the well.
315, for a process of joining well parts by welding or soldering.
SEE OR SEARCH CLASS
175, Boring or Penetrating the Earth,
11+, for processes or apparatus for boring by directly applying heat to fluidize or comminute the formation and subclass 17 for processes or apparatus for heating or cooling within the bore hole or heating or cooling the drilling fluid.
405, Hydraulic and Earth Engineering,
56, and 130+ for the application or removal of heat from an earth formation not involving a well.
