tubing-head adapter flange

tubing-head adapter flange

[′tüb·iŋ ‚hed ə′dap·tər ‚flanj]

(petroleum engineering)

An intermediate flange used in oil wells to connect the top tubing-head flange to the master valve (Christmas tree) and to provide support for the tubing.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.