Oil field cementing equipment, namely, drilling rig mechanization machines and devices in the nature of centralisers for casing and tubing [, releasable coupling devices in the nature of couplings for machines, fluid couplings being part of machines, shaft couplings for machines, and coiled tubing connectors ]

'case':18 'cement':3 'centralis':16 'coil':42 'connector':44 'coupl':22,28,32,38 'devic':11,23 'drill':6 'equip':4 'field':2 'fluid':31 'machin':9,30,36,40 'mechan':8 'name':5 'natur':14,26 'oil':1 'part':34 'releas':21 'rig':7 'shaft':37 'tube':20,43

Drill, pipe and casing protectors of metal for use in well boring and for holding the pipes in place thereafter; control line and sucker rod protectors of metal for use in well boring and for holding the pipes in place thereafter [ ; compressible tubular products of metal, namely, collapsible tubes of metal ]

'bore':12,33 'case':4 'collaps':48 'compress':42 'control':21 'drill':1 'hold':15,36 'line':22 'metal':7,28,46,51 'name':47 'pipe':2,17,38 'place':19,40 'product':44 'protector':5,26 'rod':25 'sucker':24 'thereaft':20,41 'tube':49 'tubular':43 'use':9,30 'well':11,32

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