Abstract: An inner tube head assembly for a core barrel assembly having a latch casing coupled to a latch body, a landing shoulder coupled to the latch body and a spindle, and an inner tube cap assembly coupled between the spindle and an inner tube cap adapter. The landing shoulder and the inner tube cap adapter are a first size. The latch casing, the latch body, the spindle, and the inner tube cap assembly are a second size. The inner tube head assembly includes latches configured to work with the inner tube head assembly of the first size and the drill string of the second size. The first size is larger than the second size. The inner tube head assembly engages a drill string sized to cooperate with the first size. A core drilling system is also described.

Abstract: An inner tube head assembly for a core barrel assembly having a latch casing coupled to a latch body, a landing shoulder coupled to the latch body and a spindle, and an inner tube cap assembly coupled between the spindle and an inner tube cap adapter. The landing shoulder and the inner tube cap adapter are a first size. The latch casing, the latch body, the spindle, and the inner tube cap assembly are a second size. The inner tube head assembly includes latches configured to work with the inner tube head assembly of the first size and the drill string of the second size. The first size is larger than the second size. The inner tube head assembly engages a drill string sized to cooperate with the first size. A core drilling system is also described.

Abstract: The steam cooling circuit for a gas turbine includes a bore tube assembly supplying steam to circumferentially spaced radial tubes coupled to supply elbows for transitioning the radial steam flow in an axial direction along steam supply tubes adjacent the rim of the rotor. The supply tubes supply steam to circumferentially spaced manifold segments located on the aft side of the 1-2 spacer for supplying steam to the buckets of the first and second stages. Spent return steam from these buckets flows to a plurality of circumferentially spaced return manifold segments disposed on the forward face of the 1-2 spacer. Crossover tubes couple the steam supply from the steam supply manifold segments through the 1-2 spacer to the buckets of the first stage. Crossover tubes through the 1-2 spacer also return steam from the buckets of the second stage to the return manifold segments. Axially extending return tubes convey spent cooling steam from the return manifold segments to radial tubes via return elbows.

Abstract: A rotor cooling circuit includes a cooling medium supply reservoir for supplying cooling medium to a plurality of axial passages through the turbine wheel and spacer disc rims. A passageway communicates cooling medium from the reservoir for flow in series and in a serpentine manner in and about the cavities between the wheels and discs. The flows are reunited at a plenum for flowing the cooling medium into first and second stage buckets. Return passages through the rims of the wheels and spacer discs return spent cooling medium from the buckets to a return location external of the rotor. Transition elements between the buckets and spacer plates in the rotor rim accommodate any thermal mismatch between the adjoining buckets and spacer plates to prevent cooling medium leakage at the joints.