Small screw air compressor adjustment

They are used to keep the pressure in a tank between a pre-set lower and upper pressure. When the tank pressure crosses the upper or lower limit, an electrical switch is operated. Normally Closed (NC) switch. [pdf]

Complex deepwater drilling rigs

Yes, there are drilling rigs that specialize in drilling in extremely deep water, known as ultra-deepwater drilling rigs. These rigs are specially designed to withstand the harsh conditions and challenges of drilling in depths greater than 6,000 feet (1,800 meters). [pdf]