Traceable well cement compositions and methods

Radiant energy – Geological testing or irradiation – Well testing apparatus and methods

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250302, G01V 500, G01V 510

Patent

active

057838224

ABSTRACT:
The present invention provides improved traceable well cement compositions and methods. The compositions are basically comprised of hydraulic cement, sufficient water to form a pumpable slurry and a normally non-radioactive tracer compound which becomes radioactive and emits detectible rays over a relatively short time period when exposed to neutrons. The methods of the invention relate to cementing a zone in a well and subsequently detecting the subterranean location of the cement composition therein. A traceable well cement composition of the invention is formed and introduced into a subterranean zone to be cemented. Neutrons are then emitted from a source in the well so that the tracer compound emits detectible rays, the rays are detected and the location of the cement composition in the well is determined.

REFERENCES:
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patent: 3019341 (1962-01-01), Monaghan
patent: 4122341 (1978-10-01), Smith, Jr.
patent: 4731531 (1988-03-01), Handke
patent: 5001342 (1991-03-01), Rambow
patent: 5083029 (1992-01-01), Buchanan
patent: 5243190 (1993-09-01), Bandy et al.
patent: 5252832 (1993-10-01), Nguyen et al.
Derwent Publications Ltd., London GB; Class L02, AN 86-244542, XP002028088 & SU 1 209 636A (Perm Poly), Feb. 7, 1986, Abstract.

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