Abstract: A system for coupling a first pipe segment to a second pipe segment includes a pin coupled to the first pipe segment, the pin having a first outer diameter and a second outer diameter, the second outer diameter forming a recess along at least a portion of the pin. The system also includes a box coupled to the second pipe segment, the box having an opening, the opening receiving at least a portion of the pin, wherein at least a portion of a wall of the opening includes threads. The system further includes a rotating threaded collar arranged within the recess, at least a portion of the rotating threaded collar including mating threads configured to engage the threads of the box, wherein the rotating threaded collar is rotatable about the pin.

Abstract: A system for coupling a first pipe segment to a second pipe segment includes a pin coupled to the first pipe segment, the pin having a first outer diameter and a second outer diameter, the second outer diameter forming a recess along at least a portion of the pin. The system also includes a box coupled to the second pipe segment, the box having an opening, the opening receiving at least a portion of the pin, wherein at least a portion of a wall of the opening includes threads. The system further includes a rotating threaded collar arranged within the recess, at least a portion of the rotating threaded collar including mating threads configured to engage the threads of the box, wherein the rotating threaded collar is rotatable about the pin.

Abstract: An enclosure having a top and at least one side to surround equipment is disclosed. The enclosure includes a first set of ventilation ports disposed toward the bottom of the enclosure, a second set of ventilation ports disposed toward the top of the enclosure, and a baffle disposed proximate the top at the interior of the enclosure. The top of the opening of the first set of ventilation ports is disposed to be lower than the bottom of the equipment, the bottom of the opening of the second set of ventilation ports is disposed to be higher than the top of the equipment, and the baffle is configured to direct a cooling medium toward the second set of ventilation ports.

Abstract: A propeller is mounted aft of the rear rotor supporting bearing of a gas turbine. The propeller is driven either by the rotor shaft or by the exhaust gases flowing through the exhaust frame of the turbine. The rotating propeller blows cooling air on the rear bearing. The cooling air can then be circulated through the exhaust frame to cool the exhaust frame as well.