Oil and gas well drilling equipment, namely, a coring system comprising a safety joint assembly, swivel assembly, stabilizer, inner tube, outer barrel, upper shoe, low invasion lower shoe, and core catcher used to recover geological core samples

'assembl':15,17 'barrel':22 'catcher':31 'compris':11 'core':9,30,36 'drill':5 'equip':6 'gas':3 'geolog':35 'inner':19 'invas':26 'joint':14 'low':25 'lower':27 'name':7 'oil':1 'outer':21 'recov':34 'safeti':13 'sampl':37 'shoe':24,28 'stabil':18 'swivel':16 'system':10 'tube':20 'upper':23 'use':32 'well':4

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