Radiant energy – Geological testing or irradiation – Well testing apparatus and methods
Patent
1988-05-31
1989-08-15
Hannaher, Constantine
Radiant energy
Geological testing or irradiation
Well testing apparatus and methods
250256, 250269, 2504961, G01V 504
Patent
active
048577286
ABSTRACT:
In logging operations in a well borehole where difficulties arise in retrieval of the logging apparatus, drilling through the logging tool is sometimes necessary. This disclosure sets forth a radioactive source material which permits this remedial step. The radioactive source material is either a short half life radioactive isotope or is in fluid form. In fluid form, it is purged out of the sonde by means of a motor controller triggered into operation to operate a piston and cylinder pump arrangement. The outlet from the cylinder is through a flow line and check valve. The purged radioactive source material is then flushed to the bottom of the well borehole and is ideally forced into a selected formation for disposal, thereby safely removing the radioactive materials from the sonde to permit destruction of the sonde.
REFERENCES:
patent: 3515871 (1970-06-01), Johnson, Jr. et al.
patent: 3766388 (1973-10-01), Greaney
patent: 4421982 (1983-12-01), Potter et al.
Beard William J.
Halliburton Logging Services Inc.
Hannaher Constantine
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