Wellhead:

A wellhead includes such equipment as the casinghead and tubing head.

Adj: pertaining to the wellhead (e.g., wellhead pressure).

Terms Related to Wellhead

• Hay pulley

  A pulley that is normally attached to the wellhead at a convenient place for the wireline to pass through as it comes from the stuffing ...

• Blowout preventer stack

  The assembly of well-control equipment including preventers, spools, valves, and nipples connected to the top of the wellhead.

• Stripper head

  A blowout prevention device consisting of a gland and packing arrangement bolted to the wellhead. It is often used to seal the annular space between ...

• Riser pipe

  The pipe and special fittings used on floating offshore drilling rigs to establish a seal between the top of the wellbore, which is on the ...

• Coiled-tubing workover

  A workover performed with a continuous steel tube, normally 3/4 inch to 1 inch outside diameter, which is run into the well in one piece ...

• Nipple up

  In drilling, to assemble the blowout preventer stack on the wellhead at the surface.

• Tree

  The wellhead.