Rotating stabilizer for shaft drilling

Details Rotating stabilizer for shaft drilling Rotating stabilizer for shaft drilling

1978-12-28

1980-10-14

Leppink, James A.

Boring or penetrating the earth

With tool shaft detail

Shaft carried guide or protector

308 4A, E21B 710

Patent

active

042275857

ABSTRACT:
A stabilizer for maintaining a drill string centered during large diameter earth boring. The stabilizer includes a ring with a continuous outer surface. The ring is mounted to the drill string so that it rotates with the drill pipe, its outer surface being in sliding contact with the shaft wall. The mounting system includes an inner plate carried by the drill string. The plate has protruding tabs that mate with tabs attached to the ring. The mating tabs support the ring and allow it to be easily uncoupled.

REFERENCES:
patent: 1721004 (1929-07-01), Debose
patent: 1848762 (1932-03-01), Atkinson
patent: 2234451 (1941-03-01), Ransome
patent: 2495073 (1950-01-01), Morris
patent: 3383946 (1968-05-01), Justman
patent: 4133397 (1979-01-01), Tschirky

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