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1. A certain crank counterbalance has its center of gravity 33 in. from the center of the crankshaft when stroke length is 44 in. In order to reduce pumping speed, and thereby decrease peak polished rod load, it was decided to change the stroke length to 64 in. What will be the new distance from the center of gravity of the counterbalance to the center of the crankshaft if it is desired to keep the counterbalance effect the same?
2. The overall efficiency of a certain pumping unit (utilizing an electric motor as the prime mover) is 39 percent. If electric power costs $0.03 per kilowatt-hour, calculate the cost (for power only) of lifting a barrel of fluid of specific gravity 0.855 from a depth of 5400 ft.
3. A well in the Steamboat Butt Field (Wyoming) is producing 584 bbl per day of fluid having a specific gravity of 0.90. Pump setting depth is 5125 ft, pumping fluid level is 3200 ft, and tubing pressure is 50 psi. What is the net lift of the fluid?
4. For the well of Prob. 3, the fuel requirement for the prime mover is 3.03 MCF/day of a gas having a net heating value of 1025 Btu/SCF. What is the overall efficiency of the installation?
An angle glass/epoxy lamina is subjected to a shear stress txy = 0.4ksi in the global axes resulting in a shear strain ?xy = 468.3 µin./in.in the global axes. What is the angle of the ply? Use the propertiesof unidirectional glass/epoxy lamina fro..
a pump accepts liquid water at 60 degf and 14 psia and compresses it isothermally to a pressure of 100 psia. the pump
refrigerant 134a at 140f and 125 psia enters a condenser of a chiller at 800 lbh and exits as a saturated liquid at the
The simple beam AB shown in the figure is subjected to a concentrated load P and a clockwise couple M1= PL/3 acting at the third points. Draw the shear-force and bending-moment diagrams for this beam.
If a component of this steel had been subjected to 5000 cycles at 100 ksi and 10,000 cycles at 75 ksi, how many additional cycles at 62 ksi would cause failure?
the radial component of velocity of water leaving the centrifugal pump sketched in figure is 30 fts. the magnitude of
Starting from x = 0 with no initial velocity, the velocity of a race car is defined by the relation v = 154 v1-e-0.00057x, where v and x are expressed in m/s and meters, respectively.
Determine the work required to compress 15.0 kg/min of superheated steam in an uninsulated, reversible compressor from 0.150 MPa, 600.°C to 1.50 MPa, 500.°C in a steady state, steady flow process.
The condition where (at most) one thread is allowed access to a resource that can not be shared. If a second thread wishes access to the resource while the first thread is using it, the second thread is made to wait until the first thread is finis..
A Pelton wheel turbine rotates at 240 rpm, has a pitch diameter of 3.0 m, a bucket angle of 165°, and a jet diameter of 5.0 cm. If the jet velocity at nozzle exit is 60 m/s and the relative velocity leaving the buckets is 0.9 times that at entry t..
Assuming the temperature at the bottom of the mine shaft was 30.0°C, use the compressibility charts to determine the value of the compressibility factor for nitrogen under these conditions.
Assuming that the mass moves on a horizontal surface, as shown in Fig. 2.42(a), determine the position at which the mass comes to rest. Assume the coefficient of friction between the mass and the surface to be 0.12.
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