Machines 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

'amount':18 'contamin':21 'core':11,26 'determin':16 'drill':10,25 'earth':7 'groundwat':12,20 'machin':1 'monitor':13 'packer':14 'permeabl':5 'present':22 'surround':8,23 'test':3

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

'apparatus':1 'borehol':7,25 'cabl':13 'case':10,14,21 'drill':8 'drive':17 'driver':11,15 'name':9 'pull':19 'tubular':20 'use':3 'well':5,24

TIGRE TIERRA

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