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Colorado School of Mines   Department of Geophysics The Center for Rock Abuse Ultrasonic Rock Velocity Measurement in the Pressure Vessel In valve numbers, note that there is a difference between "1" and "I": the first is an arabic "one", the other a roman "one". They will not refer to the same valve. To make this distinction more obvious, arabic 1 will always be preceded by a "number" sign "#". We have 2 kinds of pressures in the system: pressure of fluid in sample (PP) and hydraulic pressure on sample (PC). Behind - blue high pressure pump High pressure+air on "on" dump closed valve X open Sample installation - on pressure vessel Release PP Blow out tubing with N2 Place your jacketed sample on Pressure vessel Connect fluid lines, time measurement wires and ground wires (see image below) Use copper wire to tie everything together so nothing sticks out of perimiter of plattform Start to vacuum sample, with the vacuum only into the green side Check connections on oscilliscope Add grease to O-ring in Pressure vessel Lower outer cylinder Rotate cylinder to engage teeth, around 30° clockwise, till notches match Boot up system - on pressure board Open VII Close I Open II Switch III vent -> pressure Open #3 (oil/air bleed line) Open #1 on vessel Open #8 below board When oil flows through cylindrical glass, close #3 Close #1 on vessel Open #5 Switch on pressure meter below panel (measures PC) Open VIII Open IX Set desired confining pressure Check vacuum: has it reached the vacuum gauge at yellow side yet? Check vacuum: has it sucked out any hydraulic oil yet? (This might mean leak) Increase pressure PC - on pressure board Open VIII Open IX till pressure set DO NOT GO ABOVE 10000 PSI! Set PP as well. Decrease pressure PC - on pressure board Decrease PP Open #4 Shut down system - on pressure board Release PP Close IX Close #5 Open #4 Close #8 under board Switch III pressure -> vent Close II Open I Open VIII Open #3 Open #1 on vessel When starts bubbling in reservoir, close #3 Close VIII Close #4 Wait until bubbles stop, close #1 on vessel Close I Open II Take off sample - on pressure vessel Rotate cylinder to disengage teeth counterclockwise till notches match Raise outer cylinder Disconnet lines and wires Remove sample Blow out tubing w/ N2 How electric plugs inside the vessel and on the panel connect: