US PATENT SUBCLASS 166 / 369
.~ Producing the well


Current as of: June, 1999
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166 /   HD   WELLS

244.1  DF  PROCESSES {39}
369.~ Producing the well {3}
370  DF  .~.~> Including varying downhole pressure
371  DF  .~.~> Including non-expulsive material placed in well
372  DF  .~.~> By fluid lift


DEFINITION

Classification: 166/369

Producing the well:

(under subclass 244.1) Process which includes a significant manipulative step of recovering fluid from the earth.

(1) Note. The mere placing of a control device or removing an obstruction is not enough for classification in this subclass. Also the mere broad recitation in a claim that a well is flowed or produced is not enough. Some detail of the flowing steps must be set forth. Processes with a mere broad recitation that a well is flowed or produced are classified on some other basis. Subject matter found in any subclass of this class may have a disclosure of producing the well. Cross-references should be made with restraint, therefore. The subclasses noted below are considered especially pertinent to producing processes.

SEE OR SEARCH THIS CLASS, SUBCLASS:

247, for a process of producing a well involving the use of nuclear energy or radioactivity.

249, for a process of producing a well involving vibrating the earth or material in the earth.

263, for cyclic operation of plural wells.

264, for a process of producing a well merely to take a sample of fluid. 265+, for a process of producing a well comprising separating material leaving a well.

302+, for a process of producing a well involving heating or cooling.

305+, and especially subclass 306, for a process of producing a well involving placing a fluid into or fracturing a formation.

311+, for a process of cleaning or unloading the well.

313+, for a process of producing a parallel, nonconcentric string or multiple completion well.

SEE OR SEARCH CLASS

137, Fluid Handling,

1+, for processes of controlling fluid flow of general application. Sole disclosure or claiming of use in a well causes classification in Class 166.

417, Pumps, appropriate subclasses for methods of and apparatus for recovering earth fluids involving only pumping.