chemical preparations for sealing the drilling of geological formations, particularly preparations and material for sealing formations against leakage of fluids and muds used in the process of drilling the ground

'chemic':1 'drill':6,28 'fluid':20 'format':9,16 'geolog':8 'ground':30 'leakag':18 'materi':13 'mud':22 'particular':10 'prepar':2,11 'process':26 'seal':4,15 'use':23

rubber, asbestos, mica and/or oakum preparations used for caulking, sealing and insulating of oil wells

'and/or':4 'asbesto':2 'caulk':9 'insul':12 'mica':3 'oakum':5 'oil':14 'prepar':6 'rubber':1 'seal':10 'use':7 'well':15

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