Circulation head is an equipment designed to close the inner part of the drill string or of the tubing in case of well blowout starting. The circulation head is formed by two main parts: safety head and circulation cross.

Subassembly
Denomination
Max. Working Press
PSI (bar)
Valve Size (in) Weight kg (lbs)
Safety Head
Circulation Cross
10,000 (700) 3 1/16
2
100 (221)
160 (353)

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