Boring or penetrating the earth – Processes – Sampling of earth formations
Patent
1991-08-16
1993-05-11
Dang, Hoang C.
Boring or penetrating the earth
Processes
Sampling of earth formations
175 77, 175 78, E21B 4906
Patent
active
052093093
ABSTRACT:
A sidewall coring device includes a housing (12) which is operable to be disposed on the end of a drill string. A core tube (18) is disposed on one side of the housing on the interior thereof with an opening (20) provided for receiving core material. A coring mechanism (24) is provided that tilts outward from the housing with blades (26) engaging the sidewall. A passageway (14) allows mud to flow from the drill string downward therethrough to provide a hydraulic force to a hydraulic mechanism (32) to drive saw blades (26). The stabilizing mechanism (32) is provided for forcing the housing (12) against the sidewall of the bore to bore hole (10). The drill string imparts a downward force onto the coring blades (26) to form core segments (40) which are diverted into the core tube (18) by a diverter mechanism (22).
REFERENCES:
patent: 1674117 (1928-06-01), Mason, Jr.
patent: 1705623 (1929-03-01), Mason, Jr.
patent: 3173500 (1965-03-01), Stuart et al.
patent: 3353612 (1967-11-01), Bannister
patent: 3405772 (1968-10-01), Wisenbaker et al.
patent: 3430716 (1969-03-01), Urbanosky
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