Consulting and engineering services, namely, engineering consulting and engineering for the oil and gas industry; Fluid engineering services, namely, fluid engineering for the oil and gas industry; Research, development and engineering services in the field of acidizing, cementing, drilling and fracturing oil and gas wells; Technical consulting services in the field of acidizing, cementing, drilling and fracturing oil and gas wells

'acid':37,53 'cement':38,54 'consult':1,7,47 'develop':29 'drill':39,55 'engin':3,6,9,17,21,31 'field':35,51 'fluid':16,20 'fractur':41,57 'gas':14,26,44,60 'industri':15,27 'name':5,19 'oil':12,24,42,58 'research':28 'servic':4,18,32,48 'technic':46 'well':45,61

Chemical additives and products for use in acidizing, cementing, drilling and fracturing of oil and gas wells; Chemical additives for drilling fluids for use in oil and gas wells; Chemical additives for fracturing fluids for use in oil and gas wells

'acid':8 'addit':2,19,31 'cement':9 'chemic':1,18,30 'drill':10,21 'fluid':22,34 'fractur':12,33 'gas':16,28,40 'oil':14,26,38 'product':4 'use':6,24,36 'well':17,29,41

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