Wellhead 07 : Steel equipment installed at the surface of the well containing an assembly of heavy duty hangars and seals -the wellhead is used to support the weight of casing strings hung from it and to contain well pressure
EESiFlo North America, Terminology and Glossary: Oil Well Terms, Pennsylvania, Oil: Oil Well Drilling Science and Technology, USA 2002, flowmeterdirectory.com/flowmeter_terminology, (Oil Well Drilling Sci and Tech - Amer) {555}