US PATENT SUBCLASS 166 / 316
VALVES, CLOSURES OR CHANGEABLE RESTRICTORS


Current as of: June, 1999
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166 /   HD   WELLS

316VALVES, CLOSURES OR CHANGEABLE RESTRICTORS {5}
317  DF  .~> Destructible element
318  DF  .~> Operated by dropped element
319  DF  .~> Fluid operated {4}
330  DF  .~> Rotated operator {1}
332.1  DF  .~> Longitudinally movable operator {8}


DEFINITION

Classification: 166/316

(under the class definition) Devices comprising (1) valves, (2) closure means operable while the device is in the well (e.g., by destroying them) to effect fluid flow, or (3) means for effecting a calculated regulation of fluid flow by a

restriction whose restrictive effect may be varied (e.g., a changeable choke).

(1) Note. The restrictive effect under (3) of the definition may be changed by destroying the restriction.

SEE OR SEARCH THIS CLASS, SUBCLASS:

54, for float controlled valves.

107+, for valved receptacles with eduction pumps or plungers.

112, for valves operated during the operation of an eduction pump to allow liquid to flow into the well. 141, for a packer or plug seal which opens a port when expanded.

142+, and subclasses there noted for a central chamber with a packer or plug and a controllable passage between the chamber and the space beneath the packer.

154, for valves or closures opened by a piston fluid driven into the well.

155, for pistons fluid driven into the well with means permitting flow past the piston.

156, for a stop member positioned in a conduit and having an opening which is adapted to be closed by a piston fluid driven into the well.

162+, for receptacles with valves or closures.

179+, for flow control by means of packers or plugs.

183, for a packer with a controllable bypass outside a central conduit.

184, for a controllable passage between a central conduit and the space above a packer or plug.

188, for a packer or plug with a passage therethrough controlled by a valve, closure or variable restriction.

194, for a sleeve valve operated by a dropped ball type plug.

205, for screens with valves, closures or changeable restrictors. 231+, for spiral well screens constructed so that the spacing between the spirals may be varied.

SEE OR SEARCH CLASS

137, Fluid Handling,

67+, for flow controllers responsive to the destruction, fusion or permanent deformation of an element, subclass 155, for gas lift valves in wells, subclass 515, for line condition change responsive valves in conduit couplings, and other appropriate subclasses for fluid handling means with valves of general utility. See the class definition of Class 166 for the line.

138, Pipes and Tubular Conduits,

37+, for flow regulators of general utility and 89+, for pipe closures and plugs of general utility.

175, Boring or Penetrating the Earth,

232+, for a below ground means movable relative to an earth boring tool to stop flow toward the bore bottom, and subclasses 317+, for an earth boring apparatus with a means movable relative to a tool or shaft to control a below ground passage.

251, Valves and Valve Actuation,

76, for impact actuated valves, subclasses 142+, for a flow path with a single valve, subclasses 341+, for valves in which the valve actuator is the valve casing or a continuation thereof, and other appropriate subclasses, for valve and actuators of general utility not having a specific location in or relationship to the well.