“Shut in” means to close a well’s surface, wellhead, or subsurface valves to halt flow from or into the well, with the completion interval remaining open to the tubing below the closed valves.
Source: Alaska Oil and Gas Conservation Commission, Definitions, Alaska Admin. Code tit. 20, § 25.990, December 7, 2012. Regulations
“Shut-in” means the status of a production well or an injection well that is temporarily closed down, whether by closing a valve or disconnection or other physical means.
Source: Oil and Gas, New Mexico Administrative Code Title 19, Chapter 15, January 2013. Regulations