US PATENT SUBCLASS 166 / 368
.~ Wellhead
Current as of: June, 1999
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DEFINITION
Classification: 166/368
Wellhead:
(under subclass 335) Device comprising means at the top of the well, generally extending above the surface of the earth, adapted to cap the well, support the well structure inside a well casing, regulate the operation of the well, and/or supply well fluid for distribution.
SEE OR SEARCH THIS CLASS, SUBCLASS:
350, for a wellhead for use beneath the surface of a body of water, which wellhead is buoyantly supported above the surface of the earth.
