Weather Window

A period of good weather suitable for scheduling drilling or installation operations offshore, before periods of bad weather. Weather windows can be short term, ie between storms, or long term, ie the summer season.

Well Kill

A term referring to a range of oil well control procedures performed to stop a well from flowing.


Temporary storage of subsea equipment after deployment but before installation.


Work-class remotely operated vehicle. A large ROV typically equipped with standard set of tools, a five-function grabber and seven-function manipulators. They also have controls that enable a range of additional tooling packages to be operated without the need for a dedicated umbilical system.