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Wellhead
Wellhead: (1) The control equipment tted to the top of a well casing, incor-
porating outlets, valves, blowout preventers, etc. (2) The equipment installed
at the surface of the wellbore. A wellhead includes such equipment as the
casing head, tubing hanger, and various valves to control ow from the well.
Wellhead Flange: The ange on the rst cemented string of casing to which
the BOP is bolted during drilling and on which the wellhead is built after
drilling.
Wellhead Price: The value at the mouth of the well. In general, the well-
head price is considered to be the sales price obtainable from a third party
in an arm’s length ...