In oil drilling, a casing headSchumberger: Oilfield Glossary
/ref> is a simple metal

flange A flange is a protruded ridge, lip or rim (wheel), rim, either external or internal, that serves to increase shear strength, strength (as the flange of an iron beam (structure), beam such as an I-beam or a T-beam); for easy attachment/transfer of ...

welded or screwed onto the top of the conductor pipe (also known as ''drive-pipe'') or the casing and forms part of the

wellhead A wellhead is the component at the surface of an oil or gas well that provides the structural and pressure-containing interface for the drilling and production equipment. The primary purpose of a wellhead is to provide the suspension point and ...

system for the well. This is the primary interface for the surface pressure control equipment, for example

blowout preventer A blowout preventer (BOP) (pronounced B-O-P, not "bop") is a specialized valve or similar mechanical device, used to seal, control and monitor oil and gas wells to prevent blowouts, the uncontrolled release of crude oil or natural gas from a ...

s (for well drilling) or the

Christmas tree A Christmas tree is a decorated tree, usually an evergreen conifer, such as a spruce, pine or fir, or an artificial tree of similar appearance, associated with the celebration of Christmas. The custom was further developed in early modern G ...

(for well production). The casing head, when installed, is typically tested to very strict pressure and leak-off parameters to insure viability under

blowout Blowout or Blow out may refer to: Film and television *''Blow Out'', a 1981 film by Brian De Palma * '' The Blow Out'', a 1936 short film * ''Blow Out'' (TV series), a TV series on Bravo * "Blow Out" (''Prison Break''), an episode of ''Priso ...

conditions, before any surface equipment is installed.

References

Oilfield terminology Drilling technology Petroleum engineering {{Petroleum-stub

See also

References