Radiant energy – Geological testing or irradiation – Well testing apparatus and methods
Patent
1989-06-20
1991-03-19
Hannaher, Constantine
Radiant energy
Geological testing or irradiation
Well testing apparatus and methods
250259, 250266, 250270, 250303, G01V 504, G01V 500
Patent
active
050013424
ABSTRACT:
A process for measuring the thickness of the cement surrounding a casing in a borehole wherein a radioactive tracer is mixed with the cement and the response is monitored to determine the cement thickness. An alternate method is the mixing of a material with the cement that can be activated by a neutron source with the resulting activity being measured to determine the cement thickness.
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"Quantitative Monitoring of Water Flow Behind and in Wellbore Casing," by D. M. Arnold and H. J. Paap, Journal of Petroleum Technology, Jan. 1979, pp. 121-130.
Glick Edward J.
Hannaher Constantine
Shell Oil Company
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