DOME-TYPE PACKOFF WELLHEAD

摘要

"DOME-TYPE PACKOFF WELLHEAD" A wellhead assembly for wells having tubing carrying hot fluids into or out of the well. The tubing is subject to elongation due to thermal expansion from a fixed portion within the well. The present wellhead accommodates the thermal elongation and provides a noncontacting connection of the tubing from outside the wellhead. The wellhead may also be constructed to accommodate concentric tubing for hot fluids to or from separate portions of the well.