US PATENT SUBCLASS 277 / 324
.~ For overpressure control device (e.g., seal for a blowout preventer, etc.)

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


277 /   HD   SEAL FOR A JOINT OR JUNCTURE

322  DF  SEAL FOR WELL APPARATUS {8}
324.~ For overpressure control device (e.g., seal for a blowout preventer, etc.) {3}
325  DF  .~.~> Segmented radially actuated (e.g., ram type, etc.)
326  DF  .~.~> Rotatable
327  DF  .~.~> Axially compressed ring

DEFINITION

Classification: 277/324

For overpressure control device (e.g., seal for a blowout preventer, etc.):

(under subclass 322) Seal for well apparatus wherein the seal is for use in an annular passage formed between an inner part (e.g., cable, drill stem, pipe, rod, rope, string, tubing, etc.) and a surrounding part (e.g., well casing, tubing head, etc.) intended to regulate a higher than normal pressure condition or prevent upward movement of the inner part (e.g., cable, drill stem, pipe, rod, rope, string, tubing, etc.).

SEE OR SEARCH THIS CLASS, SUBCLASS:

584, for a dynamic, circumferential contact seal for other than a piston having an extrusion preventing (i.e., anti-extrusion) structure.

611, for a static contact seal intended for insertion between an end-to-end pipe, conduit, or cable joint having an extrusion preventing (i.e., anti-extrusion) or compression limiting feature.

616+, for a static contact seal intended for use on a pipe, conduit, or cable having an associated mounting or retaining means for the seal.

638, for a static contact seal for other than an internal combustion engine, or a pipe, conduit or cable including a particular extrusion preventing (i.e., anti-extrusion), mounting, or retaining means.

SEE OR SEARCH CLASS

251, Valves and Valve Actuation, for means to close or restrict a flow of fluid through a passage by a definite predetermined motion of the means combined with a seal, 1.1+, for a plurality of relatively movable sealing members that control an annular passage between a well casing and a drill stem, axial rod, or pipe.