US PATENT SUBCLASS 277 / 322
SEAL FOR WELL APPARATUS

Current as of: June, 1999
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277 /   HD   SEAL FOR A JOINT OR JUNCTURE

322SEAL FOR WELL APPARATUS {8}
323  DF  .~> Installation, removal, assembly, disassembly, or repair feature
324  DF  .~> For overpressure control device (e.g., seal for a blowout preventer, etc.) {3}
328  DF  .~> Longitudinally actuated packer for above ground apparatus {1}
331  DF  .~> Inflatable packer {3}
335  DF  .~> Axially facing packing cup
336  DF  .~> For below ground apparatus {1}
343  DF  .~> Seal (e.g., wiper, oil saver, stripper, etc.) accommodates irregular size of inner part
344  DF  .~> Segmented radially actuated packer (e.g., oil saver, gas saver, etc.) for above ground apparatus

DEFINITION

Classification: 277/322

SEAL FOR WELL APPARATUS:

(under the class definition) Sealing means wherein the sealing means is for use in a device or mechanism that extracts fluid from earth (e.g., a well, pump, etc.) or bores or penetrates the earth.

(1) Note. Art terms such as packer, polish rod, stringer, tool, swab, shoe, etc., describe well or well-drilling apparatus.

SEE OR SEARCH CLASS

166, Wells, for well apparatus having a seal where the well apparatus has a distinct feature (e.g.; above ground apparatus preventing upward or downward movement of an inner pipe, rod, or cable part depending into a well casing or tubing; above ground apparatus sealing the annular space between a broadly recited casing supported enclosure and an inner member; lateral port or valve on the tubular member above or below the packing; structural detail of the tubular member not contributing to the sealing function; etc.) other than sealing,

82.1+, for above ground apparatus having a releasable sealing or cleaning means for an inner part extending into the well, subclasses 84.1+ for above ground apparatus with a seal for a reciprocating part (e.g., sucker rod, etc.), subclasses 86.1+ for above ground apparatus having a valve combined with anchoring or sealing means between a casing and an inner part, subclasses 88.1+ for above ground apparatus having a lateral port combined with anchoring or sealing means between a casing and an inner part, or subclasses 179+ for a packer or plug insertable from the top of a well into a well conduit to seal between a longitudinally extending tubular part and the well conduit, especially subclass 87 for a seal expanded by confined fluid from central chamber, pump, or plunger, and subclass 202 for a cup-type seal.

175, Boring or Penetrating the Earth, for processes and means for initially forming or radially enlarging an elongated hole in the earth, in situ,

209+, for above ground means engaging bore entrance directing or receiving fluid or cuttings, subclass 214 for a seal located in a fluid head on a tool shaft, subclass 359 for mutually contacting cutter supports that are circumferentially displaced axes for a rolling cutter bit or rolling cutter bit element with seal details, or subclasses

371+ for a rolling cutter bit or rolling cutter bit element with seal details.