Method of well fluid leak prevention

Details Method of well fluid leak prevention Method of well fluid leak prevention

1978-12-06

1980-09-16

Novosad, Stephen J.

Boring or penetrating the earth

Processes

Boring with specific fluid

166253, 166292, 166 65M, 252 85LC, E21B 33138, E21B 4710

Patent

active

042224446

ABSTRACT:
Magnetic material, such as discarded magnetic tape, is ground into small pieces and mixed with well drilling fluids. When the drilling fluids are lost in porous ground, cracks or fissures in the walls of the well, the magnetic tape will accumulate and serve to block the unwanted loss of the fluid. In the event that the fissures are of a size such that the tape will not block the flow, the magnetic properties of the tape may be utilized in combination with a standard well logging instrument to provide an indication of the exact location of the area of fluid loss. At that time, further remedial measures may be taken to block the undesired flow of fluid. For example, a cement slurry may be pumped into the well in the location of the crevices and thus form a permanent seal against loss of fluid.

REFERENCES:
patent: 2401280 (1946-05-01), Walstrom
patent: 3254064 (1966-05-01), Nevins
patent: 3362476 (1968-01-01), Van Poollen
patent: 3503447 (1970-03-01), Hamby, Jr.
patent: 3993146 (1976-11-01), Poundstone et al.

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