Downhole sampling method and apparatus

Details Downhole sampling method and apparatus Downhole sampling method and apparatus

1980-08-14

1982-07-20

Myracle, Jerry W.

Measuring and testing

Borehole or drilling

Downhole test

175 4, E21B 4904

Patent

active

043399479

ABSTRACT:
Provided is an apparatus for taking core samples from the side of a borehole which comprises a gun body having a transverse shooting bore, a projectile adapted to be shot from the bore, a tether for tethering the projectile to the gun body, and a permanent magnet for holding the projectile to the gun body at the end of the tether.

REFERENCES:
patent: 2848194 (1958-08-01), Porter
patent: 2917280 (1959-12-01), Castel
patent: 3019845 (1962-02-01), Mayall
patent: 3072202 (1963-01-01), Brieger
patent: 3344869 (1967-10-01), Tijmann et al.
patent: 3973862 (1976-08-01), Segal
patent: 4280568 (1981-07-01), McPhee et al.
F. W. Lahaye, "Controlled Explosive Power Units" Jet Propulsion, Oct. 1956, pp. 145, 155 and 165.

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