Most of the equipment owned by S.H.I.E.L.D. became owned by HYDRA also due to the infiltration of HYDRA in S.H.I.E.L.D.; that included the Plasma Drill.
HYDRA learned the location of the Kree City was above the Ponce de León Theater in San Juan. After establishing the abandoned theater as a temporary base, the terrorists used the drill to cut through the volcanic rock to make a hole to the city. Raina was watching the drill work when an operative summoned her to a meeting Daniel Whitehall was having.
Melinda May and Phil Coulson saw the plasma drill when they reached the bottom of the theater. Coulson entered the hole to save Skye; May stayed topside and told Bobbi Morse and Lance Hunter to flee when they reached the drill. May was beside the drill as an earthquake occurred.