86349711
Jul 28, 2014
Mar 24, 2015
Apparatus for use in well or borehole drilling, namely, casing drivers and cable casing drivers for driving or pulling tubular casing through a well borehole
MachineryMachines for testing the permeability of earth surrounding a drilled core; groundwater monitoring packers for determining the amount of groundwater contamination present surrounding a drilled core
Electrical and Scientific Apparatus