US PATENT SUBCLASS 285 / 123.2
.~.~ Having plural parallel suspended inner tubes

Current as of: June, 1999
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285 /   HD   PIPE JOINTS OR COUPLINGS

120.1  DF  HAVING PLURAL INDEPENDENT PATHS {4}
123.1  DF  .~ For concentric tubes or pipes (e.g., well casing or wellhead type) {4}
123.2.~.~ Having plural parallel suspended inner tubes

DEFINITION

Classification: 285/123.2

Having plural parallel suspended inner tubes:

(under subclass 123.1) Subject matter comprising a plurality of collateral tubes hung within the outer tube.

(1) Note. This subclass typically provides for connectors, hangers or similar support devices for vertically supporting or suspending a pair of flow lines of a dual flow passage well.