Close in Definition


Close in:


To shut in a well temporarily that is capable of producing oil or gas.


To close the blowout preventers on a well to control a kick.

The blowout preventers close off the annulus so that pressure from below cannot flow to the surface.


To close a valve to stop or isolate fluid flow.

The term is most commonly applied to “closing-in the well,” meaning isolation of the wellbore¬†by closing the master valve.