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Pump. t. Slope Inclinometer. Slope Inclinometer. Shear Wave Velocity: V s = x/t. Downhole Hammer (Source). Velocity Transducer (Geophone Receiver). x. packer. Oscilloscope. Crosshole Testing. ASTM D 4428. Test Depth. Note: Verticality of casing
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Pump t Slope Inclinometer Slope Inclinometer Shear Wave Velocity: Vs = x/t Downhole Hammer (Source) Velocity Transducer (Geophone Receiver) x packer Oscilloscope Crosshole Testing ASTM D 4428 Test Depth Note: Verticality of casing must be established by slope inclinometers to correct distances x with depth. PVC-cased Borehole PVC-cased Borehole