EFAT

Extended factory acceptance test

Elevator

A detachable hinged grip mechanism that may be placed around the drill pipe to lift or lower it into the wellbore.

Entrained Gas

Formation gas that enters the drilling fluid in the annulus.

EPC

Engineering procurement construction. A prominent form of contracting agreement, where the engineering and construction contractor carries out the detailed engineering design of the project, procurement of necessary equipment and materials, and then construct to deliver a functioning facility or asset to their clients. Also called the execution phase, this phase usually follows the FEED.

EPCI

Engineering Procurement Construction and Installation. A common contracting arrangement. Unlike an EPC contract, the offshore facility or vessel that is constructed has to be transported and installed at the project location.