Boring or penetrating the earth – With expansible bore wall anchor
Patent
1992-04-08
1993-12-07
Neuder, William P.
Boring or penetrating the earth
With expansible bore wall anchor
175246, E21B 2502
Patent
active
052676200
ABSTRACT:
A drilling tool, for example a core barrel inner tube assembly or a drilling bit, is attached to the inner end of a latch body which is removably seatable on a landing shoulder of a drill string. A latch retractor is mounted to the latch body for limited axial movement and has a latch assembly chamber opening inwardly to the closed end of the tubular portion of the latch body. The latch assembly includes a rigid transverse link that at opposite ends dependingly pivotally mount a pair of latches, there being no mechanical attachment of the assembly to the retractor or latch body. A transverse stop member limits the latch lateral sections movement inwardly toward the other from a latch seated position to a latch retracted position. At the inner end of the retractor, there are angularly spaced flanges extending radially toward the other in the chamber for retracting the latches as the retractor is withdrawn. The flanges are spaced to permit the assembly being extended therebetween and into the chamber. After the latches are extended angularly between the flanges and moved axially into the chamber, the latches are retracted and rotated about the central axis about 90 degrees, the retractor is extended into the tubular portion and the stop member is mounted to the latch body to extend between the latches.
REFERENCES:
patent: 1326509 (1919-12-01), Humason
patent: 1987119 (1934-10-01), Walker
patent: 2829868 (1958-04-01), Pickard et al.
patent: 2905438 (1959-09-01), Church
patent: 3103981 (1963-09-01), Harper
patent: 3120283 (1964-02-01), Braun
patent: 3266835 (1966-12-01), Hall et al.
patent: 3305033 (1967-02-01), Pickard et al.
patent: 3333647 (1967-08-01), Karich et al.
patent: 3346059 (1967-10-01), Svendsen
patent: 3461981 (1969-08-01), Casper et al.
patent: 3485310 (1969-12-01), Milosevich
patent: 3777826 (1973-12-01), Wolda
patent: 3977482 (1976-08-01), Reed et al.
patent: 4418770 (1983-12-01), Lambot
patent: 4466497 (1984-08-01), Soinski et al.
patent: 4800969 (1989-01-01), Thompson
patent: 4832138 (1989-05-01), Hallez
patent: 4834198 (1989-05-01), Thompson
Johnson Clayton R.
Longyear Company
Neuder William P.
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