What is Wellhead or Xmas Tree?

Wellhead/Xmas Tree

The wellhead provides the basis for the mechanical construction of the well at surface or the sea-bed.

It provides for:

  1. Suspension of all individual casings and tubular, concentrically in the well

  2. Ability to instal a surface closure/flow control
    device on top of the well namely:

i) A blow out preventer stack whilst drilling

ii) A Xmas tree for production or injection

  1. Hydraulic access to the annuli between casing to allow cement placement and between the production casing and tubing for well circulation

1 Like