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Use of a chopper mechanism to add fibers to a well

E - Fixed Constructions – 21 – B
Patent

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Use of a gas-driven foam bank in a secondary recovery process

E - Fixed Constructions – 21 – B
Patent

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Use of a heavy petroleum fraction as a drive fluid in the...

E - Fixed Constructions – 21 – B
Patent

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Use of a high purity imidazoline based amphoacetate...

E - Fixed Constructions – 21 – B
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Use of a solvent-external emulsion for in situ oil recovery

E - Fixed Constructions – 21 – B
Patent

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Use of alkanesulphonic acids as asphaltene dispersants

E - Fixed Constructions – 21 – B
Patent

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Use of aqueous dispersions for tertiary petroleum production

E - Fixed Constructions – 21 – B
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Use of axial accelerometer for estimation of instantaneous...

E - Fixed Constructions – 21 – B
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Use of ball sealers in co.sub.2 or steam injection wells

E - Fixed Constructions – 21 – B
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Use of barite in perforating devices

E - Fixed Constructions – 21 – B
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Use of c02/steam to enhance steam floods in horizontal...

E - Fixed Constructions – 21 – B
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Use of chlorous acid in oil recovery

E - Fixed Constructions – 21 – B
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Use of cutting velocities for real time pore pressure and...

E - Fixed Constructions – 21 – B
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Use of delayed release breakers in gelled hydrocarbons

E - Fixed Constructions – 21 – B
Patent

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Use of dispersion polymers as friction reducers in aqueous...

E - Fixed Constructions – 21 – B
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Use of distributed temperature sensors during wellbore...

E - Fixed Constructions – 21 – B
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Use of downhole high pressure gas in a gas-lift well

E - Fixed Constructions – 21 – B
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Use of elastomers to produce gels for treating a wellbore

E - Fixed Constructions – 21 – B
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Use of flexible member for borehole diameter measurement

E - Fixed Constructions – 21 – B
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Use of foams having opposite ionic properties in secondary...

E - Fixed Constructions – 21 – B
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