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<strong>Well</strong> head<br />
• Casing heads are<br />
attached to surface<br />
casing or to another<br />
casing head to<br />
provide a hanging<br />
point for the next<br />
string of casing.<br />
− If there is one casing<br />
head, it is welded or<br />
screwed (depending on<br />
diameter) to the surface<br />
casing, and the<br />
production casing is hung<br />
from it.
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