Sidewall sampling apparatus

Details Sidewall sampling apparatus Sidewall sampling apparatus

1980-02-01

1981-07-28

Leppink, James A.

Boring or penetrating the earth

Boring with explosion in inaccessible hole

Firing control mechanically actuated in bore

175 20, 245404, E21B 2504, E21B 2510

Patent

active

042805686

ABSTRACT:
Apparatus for taking a sample of earth formations surrounding a borehole. A core sampling projectile is provided which has a core-taking barrel with a frontal cutting edge and is releasable secured to a base member of relatively more mass than the barrel. The base member has an enlarged outer diameter annular abutment thereby limiting the depth of penetration of the core-taking barrel to a predetermined distance.

REFERENCES:
patent: 573695 (1896-12-01), Penfield
patent: 2052394 (1936-08-01), Fullman
patent: 2775427 (1956-12-01), Leone
patent: 2848195 (1958-08-01), Porter
patent: 2923530 (1960-02-01), Fields
patent: 2937005 (1960-05-01), Porter
patent: 3142273 (1964-07-01), Dilts
patent: 3419089 (1968-12-01), Venghiattis
patent: 3429383 (1969-02-01), Pardue
patent: 3755962 (1973-09-01), Walters et al.
patent: 4129401 (1978-12-01), Berthier

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