Skip to main content
About
Calendar
Contact
Login
Search
Toggle Menu
Publications
Membership
Corporate Membership
Associate Company Scheme
EEMUA Membership brochure 2023
Testimonials
Members and Associates
Events
Training Courses
Search
Search
Login/Register
Basket
About
Calendar
Contact
Search
Search
Tree
Tree
. The assembly of valves fitted onto wellheads for the purpose of controlling flow into and out of the well. Previously called Christmas Trees. Described in ISO 13628‐4 (API Spec 17D) for wells completed on the seabed.