Drill rig at sky harbor

A construction worker is missing and feared dead after a massive drill rig collapsed on the job site at Sky Harbor Airport Monday.. A construction worker is missing and feared dead after a massive drill rig collapsed on the job site at Sky Harbor Airport Monday.. Days after a drilling rig toppled near Phoenix Sky Harbor Airport, a worker's body has been recovered from the scene. The Phoenix Fire Department says the incident happened near the West Economy Lot, west of Terminals 2, 3 and 4 around 9 a.m. on Monday. [pdf]

Electrical control house on drilling rig

VFD House: This is the main electrical room on the rig. It supplies power to all rig equipment and contains the PLC (Programmable Logic Controller), VFDs (Variable Frequency Drives) for all motors, and generator control cubicles. It is the central hub where equipment control takes place. 2. [pdf]